IEC 61111:2026

• Abstract:

  IEC 61111:2026 is applicable to electrical insulating matting made of flexible insulating material for use as a covering of the surface on which the worker is positioned and for worker´s electrical protection on electrical installations up to 36 000 V AC for AC use or 36 000 V AC and 54 000 V DC for AC/DC use.

• Status: Published
• Publication Date: 03-Sep-2026
• ICS: 13.260 - Protection against electric shock. Live working
• ICS: 29.240.20 - Power transmission and distribution lines
• ICS: 29.260.99 - Other electrical equipment for working in special conditions
• Technical Committee: TC 78 - Live working
• Current Stage: PPUB - Publication issued
• Start Date: 04-Sep-2026
• Completion Date: 07-Aug-2026

• Revises: IEC 61111:2009 - Live working - Electrical insulating matting
• Effective Date: 19-Jul-2024

IEC 61111 ®
Edition 3.0 2026-09
INTERNATIONAL
STANDARD
REDLINE VERSION
Live working - Electrical insulating matting
ICS 13.260; 29.240.20; 29.260.99 ISBN 978-2-8327-1496-6
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CONTENTS
FOREWORD . 4
INTRODUCTION . 1
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Requirements . 10
4.1 General . 10
4.2 Electrical classification . 10
4.3 Physical requirements . 10
4.3.1 Composition . 10
4.3.2 Shape . 10
4.3.3 Dimensions and tolerances . 11
4.3.4 Temperature . 12
4.3.5 Workmanship and finish . 12
4.4 Mechanical, climatic and environmental requirements . 12
4.5 Dielectric requirements . 12
4.6 Marking . 12
4.7 Packaging . 13
4.8 Instructions for use . 13
5 Type tests . 14
5.1 General . 14
5.2 Visual inspection and measurements . 14
5.2.1 General . 14
5.2.2 Classification . 14
5.2.3 Composition . 14
5.2.4 Dimensions, workmanship and finish . 14
5.2.5 Thickness . 15
5.3 Marking . 15
5.3.1 Visual inspection and measurement . 15
5.3.2 Durability of marking . 15
5.4 Packaging and instructions for use . 15
5.5 Mechanical tests . 16
5.5.1 General . 16
5.5.2 Mechanical puncture resistance . 16
5.5.3 Test for slip resistance . 17
5.6 Dielectric tests . 17
5.6.1 General . 19
5.6.2 Electrodes . 20
5.6.3 Test equipment . 24
5.6.4 Electrical test procedure . 25
5.7 Ageing test . 26
5.8 Thermal tests . 26
5.8.1 Flame retardance test . 26
5.8.2 Low temperature folding test (except for matting of category C) . 27
5.8.3 Extremely low temperature folding test for matting of category C only. 28
5.9 Acid resistance . 28
5.10 Oil resistance . 28
6 Conformity Method of assessment of defects and verification of performance
applicable to electrical insulating matting having completed the production phase . 29
6.1 General . 29
6.2 Routine test . 29
6.3 Sampling test . 30
7 Modifications . 29
Annex A (informative) Guidelines for the selection of the class of electrical insulating
matting in relation to nominal voltage of a system . 31
Annex B (normative) Suitable for live working, double triangle
(IEC 60417-5216:2002-10) . 32
Annex C (informative)  In-service care and testing . 33
C.1 General . 33
C.2 Storage . 33
C.3 Marking on matting of small dimensions cut from rolls . 33
C.4 Examination before use . 33
C.5 Temperature . 33
C.6 Precautions in use . 34
C.7 Periodic inspection and testing . 34
C.7.1 General . 34
C.7.2 Check-in . 35
C.7.3 Cleaning . 35
C.7.4 Preliminary visual inspection . 34
C.7.5 Electrical test . 35
C.7.6 Final visual inspection. . 36
C.7.7 Record-keeping and marking or stamping . 36
C.7.8 Packing for storage or shipment . 36
Annex D (normative) General type test procedure . 37
D.1 General . 37
D.2 Group size requirements . 38
D.2.1 Group 1 . 38
D.2.2 Group 2 . 38
D.2.3 Group 3 . 38
D.2.4 Group 4 . 38
D.2.5 Group 5 . 39
Annex E (normative) Oil for tests for oil resistance . 40
E.1 Particularities of liquid 102 . 40
E.2 Characteristics of oil no. 1 . 40
Annex F (normative) Classification of defects and tests to be allocated . 41
Annex G (informative) Rationale for the classification of defects . 42
Bibliography . 43

Figure 1 – Test plates and needle for resistance to mechanical puncture . 17
Figure 2 – Test for slip resistance . 19
Figure 3 – Test set-up for voltage proof test of electrical insulating matting
with alternative type of electrodes .
Figure 3 – Test set-up for voltage proof test of electrical insulating matting with
standard type of electrodes . 21
Figure 4 – Test set-up for voltage withstand test . 24
Figure 5 – Test set-up for low and extremely low temperature folding tests . 27
Figure 6 – Example of test set-up for testing the entire length of each roll . 30

Table 1 – Classes and maximum use voltages for electrical insulating matting . 10
Table 1 – Common lengths and widths for electrical insulating matting .
Table 2 – Maximum thickness for electrical insulating matting . 11
Table 3 – Maximum electrode clearance for proof tests. 22
Table 4 – Test voltages . 25
Table 5 – Sampling plan . 30
Table A.1 – Designation maximum use voltage .
Table C.1 – Guide for periodic inspection and testing of matting . 35
Table C.2 – Voltage values for periodic testing . 36
Table D.1 – List and chronological order of type tests . 37
Table E.1 – Characteristics of oil no. 1 . 40
Table F.1 – Classification of defects and associated requirements and tests. 41
Table G.1 – Justification for the type of defect . 42

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Live working -
Electrical insulating matting
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
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with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
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shall not be held responsible for identifying any or all such patent rights.
This redline version of the official IEC Standard allows the user to identify the changes made
to the previous edition IEC 61111:2009. A vertical bar appears in the margin wherever a change
has been made. Additions are in green text, deletions are in strikethrough red text.

IEC 61111 has been prepared by IEC technical committee 78: Live Working. It is an
International Standard.
This third edition cancels and replaces the second edition published in 2009. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) review of the scope;
b) introduction of AC/DC use and AC use only;
c) verification of dated referenced standards;
d) improvement of the marking;
e) rewriting of the test for slip resistance;
f) updating the use of IEC 61318;
g) creation of an alternative test;
h) revision and updating of Annexes A, B, C, D, F, G.
The text of this International Standard is based on the following documents:
Draft Report on voting
78/1559/FDIS 78/1584/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
INTRODUCTION
This document has been prepared according to the requirements of IEC 61477 where
applicable.
The product covered by this document may can have an impact on the environment during some
or all stages of its life cycle. These impacts can range from slight to significant, be of short-term
or long-term, and occur at the global, regional or local level.
Except for a disposal statement in the instructions for use, this document does not include
requirements and test provisions for the manufacturers of the product, or recommendations to
the users of the product for environmental improvement. However, all parties intervening in its
design, manufacture, packaging, distribution, use, maintenance, repair, reuse, recovery and
disposal are invited to take account of environmental considerations.

1 Scope
This document is applicable to electrical insulating matting made of elastomer flexible insulating
material for use as a floor covering for of the surface on which the worker is positioned and for
worker´s electrical protection of workers on electrical installations up to 36 000 V AC for AC
use or 36 000 V AC and 54 000 V DC for AC/DC use.
NOTE 1 For a.c. electrical classification, as well as d.c. use, see 4.2.
NOTE 2 This document gives a.c. test provisions. There is limited history for use in d.c. applications.
NOTE 3 See Annex A for suggested maximum voltage use.
NOTE 1 The electric potential of the surface on which the worker is positioned is usually that of earth.
NOTE 2 See 4.2 for maximum use voltage.
NOTE 3 DC only rated matting is not specified in this document.
NOTE 4 This document does not cover the use of insulating blankets (see IEC 61112)
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60060-1, High-voltage test techniques - Part 1: General terminology and test requirements
IEC 60060-2, High-voltage test techniques - Part 2: Measuring systems
IEC 60068-1, Environmental testing - Part 1: General and guidance
IEC 60212:1971, Standard conditions for use prior to and during the testing of solid electrical
insulating materials
IEC 60417, Graphical symbols for use on equipment
IEC 61318, Live Working – Conformity Methods for assessment of defects and verification of
performance applicable to tools, devices and equipment
IEC 61477, Live working - Minimum requirements for the utilization of tools, devices and
equipment
ISO 2592, Petroleum and related products - Determination of flash and fire points - Cleveland
open cup method
ISO 2977, Petroleum products and hydrocarbon solvents - Determination of aniline point and
mixed aniline point
ISO 3104, Petroleum products - Transparent and opaque liquids - Determination of kinematic
viscosity and calculation of dynamic viscosity
ISO 4649:2017, Rubber, vulcanized or thermoplastic - Determination of abrasion resistance
using a rotating cylindrical drum device
ISO 5904:1981, Gymnastic equipment – Landing mats and surfaces for floor exercises –
Determination of resistance to slipping
ISO 23529, Rubber - General procedures for preparing and conditioning test pieces for physical
test methods
ASTM D 3767:2003 (reapproved 2008), Standard practice for rubber – Measurement of
dimensions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61318 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
– ISO Online browsing platform: available at https://www.iso.org/obp
– IEC Electropedia: available at http://www.electropedia.org/
3.1
disruptive discharge
passage of an electric arc following dielectric electric breakdown
Note 1 to entry: The term “sparkover” is used when a disruptive discharge occurs in a gaseous or liquid dielectric.
Note 2 to entry: The term “flashover” is used when a disruptive discharge occurs at least partly along the surface
of a solid dielectric surrounded by a gaseous or liquid medium.
Note 3 to entry: The term “puncture” is used when a disruptive discharge occurs through a solid dielectric producing
permanent damage.
[IEV 651-01-18 and definition 2.7.7 of IEC 60743, modified]
[SOURCE: IEC 60050-212:2010, 212-11-46, modified – Note to entry deleted and replaced by
notes to entry 1,2 and 3]
3.2
elastomer
macromolecular material which returns rapidly to its initial dimensions and shape after
substantial deformation by a weak stress and release of the stress rapidly to approximately its
initial dimensions and shape
Note 1 to entry: The definition applies to room temperature test conditions.
Note 2 to entry: Elastomer is a generic term that includes rubber, latex and elastomeric compounds that may be
natural or synthetic or a mixture or a combination of both. It also includes thermoplastic elastomer (TPE) material.
[ISO 472 modified]
[SOURCE: IEC 60050-212:2010, 212-14-05, modified – Note 2 to entry has been added.]
3.3
electrical insulating matting
flexible sheeting made of elastomer, used to cover the surface on which the worker is standing
(the potential of this surface is usually that of earth)
NOTE The sheeting is either of various definite shapes or in roll allowing the workers to custom-cut the material to
fit the application.
[Definition 5.2.3 of IEC 60743 and IEV 651-04-07, modified]
flat protective cover made of flexible insulating material, used to provide electrical insulation
between the feet of the worker and the surface on which the worker is standing
Note 1 to entry: The electric potential of the surface on which the worker is standing is usually that of earth.
[SOURCE: IEC 60050-651:2014, 651-22-13, modified – Note 2 to entry has been deleted]
3.4
international rubber hardness degree
IRHD
measure of hardness, the magnitude of which is derived from the depth of penetration of a
specified indentor into a test piece under specified conditions
Note 1 to entry: The IRHD scale is such that 0 degrees represents a material showing no measurable resistance
to indentation and 100 degrees represents a material showing no measurable indentation. The scale is described
fully in ISO 48.
[SOURCE: ISO 1382:2020, 3.264]
3.5
nominal voltage of a system
suitable approximate value of voltage used to designate or identify a system
[SOURCE: IEC 60050-601:1985, 601-01-21]
3.6
proof test
test to demonstrate the safety of the equipment for work by evaluating the
capability of the insulating material or product under prescribed test conditions to conform with
applicable rating
Note 1 to entry: An AC proof test typically involves applying a voltage corresponding to a temporary overvoltage
higher than the equipment's nominal operating voltage for a specified period.
Note 2 to entry: A DC proof test typically involves applying a voltage value gain from long time in-service testing
experience corresponding to DC voltage level able to find harmful physical irregularities in insulating material with
sufficient safety margin.
3.7
proof test voltage
specified voltage that is applied to a device or test piece for the time defined under specified
conditions to assure that the electrical strength of the insulation is above a specified value the
applicable rating
3.8
routine test
conformity test made on each individual item during or after manufacture
[SOURCE: IEC 60050-151:2001, 151-16-17]
3.9
withstand test
test on insulating material or product made by applying a high voltage
across the insulation to determine the adequacy of the dielectric strength
Note 1 to entry: The dielectric strength includes the material integrity.
Note 2 to entry: An AC withstand test typically involves applying a high voltage stress corresponding to a switching
overvoltage.
Note 3 to entry: The value of the DC withstand test is gain from the experience testing and the knowledge of the
insulating material quality and integrity.
3.10
withstand test voltage
voltage that a test piece is required to withstand without disruptive discharge or other electric
failure when voltage is applied under specified conditions
4 Requirements
4.1 General
Electrical insulating matting shall be designed and manufactured to contribute to the safety of
the users provided they are used by skilled persons, in accordance with safe methods of work
and the instructions for use.
4.2 Electrical classification
The electrical insulating matting covered by this document shall be designated as follows:
– by electrical class as given in Table 1
Table 1 – Classes and maximum use voltages for electrical insulating matting
Class Maximum use voltages for AC/DC used matting Maximum use voltage for AC only
used matting
0 1 000 V AC / 1 500 V DC 1 000 V
1 7 500 V AC / 11 250 V DC 7 500 V
2 17 000 V AC / 25 500 V DC 17 000 V
3 26 500 V AC / 39 750 V DC 26 500 V
4 36 000 V AC / 54 000 V DC 36 000 V

– by adding the suffix “C” to the class designation, in case of category C matting (resistance
to extremely low temperature).
Additional guidance for the selection of electrical class (a.c. and d.c.) is given in Annex A.
Guidance as to temperature range at which electrical insulating matting can be used is given in
Annex B.
4.3 Physical requirements
4.3.1 Composition
The electrical insulating matting shall be manufactured of flexible insulating material such as
elastomer.
Both sides of the electrical insulating matting shall be slip resistant. The slip resistance may
can be achieved with surface such as corrugated or diamond design.
Any insert shall not adversely affect the dielectric characteristics of the electrical insulating
matting.
4.3.2 Shape
There is no requirement for the shape of the electrical insulating matting.
Electrical insulating matting may can be supplied in either of various shapes portable style or
stationary style (in roll) to be cut for individual applications.
4.3.3 Dimensions and tolerances
4.3.3.1 Length and width
Electrical insulating matting of class 0,1 and 2 shall not have length and width less than 600 mm.
Electrical insulating matting of class 3 and 4 shall not have length and width less than 914 mm.
Manufacturers shall provide the dimensions of the matting length and width. These dimensions
for each matting shall be within a tolerance of up to ±2 % of the stated dimensions.
Common lengths and widths for electrical insulating matting are indicated in Table 1.
Table 1 – Common lengths and widths for electrical insulating matting
Matting in various shapes Matting in rolls
Length Width Width
mm mm mm
1 000 600 610
1 000 1 000 760
1 000 2 000 915
1 220
Portable matting shall have maximum dimensions of (width x length) less than or equal to
1 220 × 2 000 mm.
Stationary matting shall have longitudinal length above 2 000 mm.
4.3.3.2 Maximum thickness
The maximum thickness of matting shall be as given in Table 2 in order to obtain appropriate
flexibility.
Table 2 – Maximum thickness for electrical insulating matting
Class mm
0 6,0
1 6,0
2 8,0
3 11,0
4 14,0
When corrugations or diamonds are present, measurements shall be made over the
corrugations or diamonds. The corrugations shall not be more than 3 mm deep. The
corrugations of the matting on one side of the matting do not line up with corrugations on the
other surface of the matting. The diamonds shall not be higher than 2 mm.
4.3.3.3 Minimum thickness
The minimum thickness shall be determined only by the ability to pass the tests defined in
Clause 5.
4.3.4 Temperature
Standard electrical insulating matting shall be designed to be used in applications having
ambient temperatures between -25 °C and +55 °C and category C matting in ambient
temperatures between -40 °C and + 55 °C.
4.3.5 Workmanship and finish
Electrical insulating matting shall be free on both surfaces from harmful physical irregularities
that can be detected by thorough test and/or inspection.
Harmful physical irregularities are those defined as any feature that disrupts the uniform,
smooth surface contour, such as pinholes, cracks, blisters, cuts, conductive embedded foreign
matter, creases, pinch marks, voids (entrapped air). Prominent ripples and prominent molded
marks shall not be acceptable.
Non-harmful physical irregularities are those defined as surface irregularities present on either
surface of the matting due to imperfections on forms or molds or other imperfections inherent
to the manufacturing process shall be acceptable. These irregularities appear as mould marks
that look like cuts, even though they are actually a raised ridge of elastomer, indentations, or
protuberances. These irregularities may be considered acceptable provided that:
a) the thickness at any irregularity conforms to the thickness requirements. Surface design to
improve slip resistance shall not be considered as an irregularity;
b) the indentations, protuberances or mold marks blend into a smooth slope upon stretching
of the material mechanical, climatic and environmental requirements.
Any additions to the matting for marking or traceability e.g. identification tags or microchips can
be considered as non-harmful irregularities as long as the matting fulfils the dielectric and
mechanical requirements contained in subclauses 4.1 through 4.3.4, 4.4 and 4.5.
4.4 Mechanical, climatic and environmental requirements
Electrical insulating matting shall support the mechanical, climatic and environmental stresses
occurring during normal working conditions.
All electrical insulating matting shall be resistant to acid, oil, and low temperature and
Category C shall be resistant to extremely low temperature:
– resistant to puncture and verified by test of 5.5.2 and 5.7;
– flame retardant and verified by test of 5.8.1;
– resistant to acid and verified by test of 5.9;
– resistant to oil and verified by test of 5.10;
– resistant to low temperature and verified by test of 5.8.2 (except for category C).
Category C electrical insulating matting shall be resistant to extremely low temperature and
verified by test of 5.8.3.
4.5 Dielectric requirements
Electrical insulating matting shall be capable of withstanding the corresponding electrical
stresses according to its electrical class.
4.6 Marking
Electrical insulating matting complying with the requirements of this document shall be marked
on the product with the following items of marking:
– name, trademark or identification of the manufacturer;
– symbol IEC 60417-5216:2002-10 (Suitable for live working, double triangle), see Annex B;
NOTE The exact ratio of the height of the figure to the base of the triangle is 1,43. For the purpose of convenience,
this ratio can be between the values of 1,4 and 1,5.
– number of the relevant IEC standard immediately adjacent to the symbol, with year of
publication (4 digits);
– month and year of manufacture;
– category C if applicable;
– electrical class designation;
– AC/DC, or AC according to the expected use;
– in the case of matting in rolls, these items of marking shall appear at least every 0,6 meter.
Any additional item of marking shall be subject to agreement between the manufacturer and the
customer.
The marking shall be clearly identifiable by persons with normal or corrected sight without
further magnification; be clearly visible, durable and shall not impair the quality of the electrical
insulating matting.
When a colour code for labels or space is used, the colour of the symbol (double triangle)
marking shall correspond to the following code:
Class 0: red,
Class 1: white,
Class 2: yellow,
Class 3: green,
Class 4: orange.
4.7 Packaging
Electrical insulating matting shall be packaged in containers or packages of sufficient strength
to properly protect the electrical insulating matting from damage during delivery and normal
storage and transportation before first use supplied in suitable packaging for shipping and initial
storage to provide protection until it is opened for use.
NOTE It is the responsibility of the user to provide protective packaging (ex: a specific bag) if cut portions are to
be reused.
The outside of the container or package shall be marked with at least the following information:
– product name and reference or catalog number for example;
– number of the relevant IEC standard immediately adjacent to the symbol with year of
publication (4 digits), (IEC 61111:2009);
– name, trademark, or identification of the manufacturer.
– electrical class designation;
– AC/DC or AC according to the expected use;
– dimensions (length and width) of the product.
4.8 Instructions for use
The manufacturer shall provide written instructions for use with each packaging consignment
of electrical insulating matting covered by this document.
These instructions shall be prepared in accordance with the general provisions of IEC 61477.
The instructions for use shall include as a minimum, information such as storage, handling,
disposal and periodic testing.
The instructions for use shall inform the users about critical hazards the manufacturer is aware
of and offer relevant recommendations, but without intruding into the area of work procedures
(for example, recommendation in case of overlapping matting). Additional information is given
in Annex C.
5 Type tests
5.1 General
This document provides testing provisions to demonstrate compliance of the product to the
requirements of Clause 4. These testing provisions are primarily intended to be used as type
tests for validation of the design input. Where relevant, alternative means (calculation,
examination, tests, etc.), are specified within the test subclauses for the purpose of electrical
insulating matting having completed the production phase.
The allocation of the electrical insulating matting into various test groups, the quantity required
and the order in which the type tests are carried out are given in Annex D.
The test location conditions shall be in accordance with IEC 60068-1:
− ambient temperature: 15 °C to 35 °C;
− relative humidity: 4525 % to 75 %;
− atmospheric pressure: 86 kPa to 106 kPa.
For type tests, electrical insulating matting or test pieces shall be conditioned for a period of
2 h ± 0,5 h at a temperature of 23 °C ± 2 °C and relative humidity of 50 % ± 5 % according to
IEC 60212 standard atmosphere B, unless otherwise specified.
The tolerances for any measured value shall be ±5 %, unless otherwise specified.
5.2 Visual inspection and measurements
5.2.1 General
Visual inspection shall be carried out by people with normal or corrected vision sight without
further magnification.
5.2.2 Classification
ItThe matting shall be checked by visual inspection to ensure that the requirements of 4.2 are
fulfilled.
5.2.3 Composition
ItThe matting shall be checked by visual inspection to ensure that the requirements of 4.3.1 are
fulfilled.
5.2.4 Dimensions, workmanship and finish
The product length and width provided by the manufacturer shall be verified with the electrical
insulating matting in a flattened condition.
The test shall be considered as passed if the requirements of 4.3.3.1 for the minimum
dimensioning is fulfilled and the tolerances are in accordance with 4.3.3.1 are satisfied.
The workmanship and finish shall be verified by visual inspection. In case of Where matting is
supplied in a roll, a length of 2 m shall be submitted to for inspection.
The inspection shall be considered as passed if the requirements of 4.3.5 are satisfied. Non-
harmful physical irregularities are defined as surface irregularities present on either surface of
the matting due to imperfections on forms or moulds or other imperfections inherent to the
manufacturing process and are acceptable provided that:
a) the thickness at any irregularity conforms to the thickness requirements. Surface design to
improve slip resistance shall not be considered as irregularities;
b) the indentations, protuberances or mould marks tend to blend into a smooth slope upon
stretching of the material.
5.2.5 Thickness
Thickness measurements shall be made at five or more points approximately uniformly
distributed over the total area of the electrical insulating matting. In case of Where matting is
supplied in a roll, a length of 2 m shall be submitted to test.
Measurements shall be made with a commercial device designed for use on flexible materials
and that measures the maximum thickness with an accuracy of 0,03 mm. Sufficient support
shall be given to the matting so that it will present an unstressed flat surface at the measurement
point.
According to ASTM D3767 ISO 23529, the pressure exerted by the presser foot of the
measuring device shall be (22 kPa ± 5) kPa for matting material having a hardness equal to or
greater than 35 IRHD, and (10 kPa ± 2) kPa for matting material having a hardness less than
35 IRHD.
The test shall be considered as passed if the requirements of 4.3.3.2 are satisfied.
5.3 Marking
5.3.1 Visual inspection and measurement
The marking requirements of 4.6 shall be verified by visual inspection. In case of Where matting
is supplied in a roll, a length of 2 m shall be submitted to test inspection.
5.3.2 Durability of marking
The durability of the items marked on the electrical insulating matting shall be checked by
rubbing vigorously for 15 s with a piece of lint-free cloth soaked in soapy water and then rubbing
it for a further 15 s with a piece of lint-free cloth soaked in isopropanol (CH -CH(OH)-CH ).
3 3
NOTE It is the employer’s duty to ensure that any relevant legislation and any specific safety instructions regarding
the use of this chemical are fully observed.
The test shall be considered as passed if the items of
...

IEC 61111 ®
Edition 3.0 2026-09
INTERNATIONAL
STANDARD
Live working - Electrical insulating matting

ICS 13.260; 29.240.20; 29.260.99 ISBN 978-2-8327-1470-6

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CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Requirements . 9
4.1 General . 9
4.2 Electrical classification . 10
4.3 Physical requirements . 10
4.3.1 Composition . 10
4.3.2 Shape . 10
4.3.3 Dimensions and tolerances . 10
4.3.4 Temperature . 11
4.3.5 Workmanship and finish . 11
4.4 Mechanical, climatic and environmental requirements . 12
4.5 Dielectric requirements . 12
4.6 Marking . 12
4.7 Packaging . 13
4.8 Instructions for use . 13
5 Type tests . 13
5.1 General . 13
5.2 Visual inspection and measurements . 14
5.2.1 General . 14
5.2.2 Classification . 14
5.2.3 Composition . 14
5.2.4 Dimensions, workmanship and finish . 14
5.2.5 Thickness . 14
5.3 Marking . 14
5.3.1 Visual inspection and measurement . 14
5.3.2 Durability of marking . 15
5.4 Packaging and instructions for use . 15
5.5 Mechanical tests . 15
5.5.1 General . 15
5.5.2 Mechanical puncture resistance . 15
5.5.3 Test for slip resistance . 16
5.6 Dielectric tests . 18
5.6.1 General . 18
5.6.2 Electrodes . 19
5.6.3 Test equipment . 20
5.6.4 Electrical test procedure . 20
5.7 Ageing test . 22
5.8 Thermal tests . 22
5.8.1 Flame retardance test . 22
5.8.2 Low temperature folding test (except for matting of category C) . 23
5.8.3 Extremely low temperature folding test for matting of category C only. 23
5.9 Acid resistance . 24
5.10 Oil resistance . 24
6 Method of assessment of defects and verification of performance applicable to
electrical insulating matting having completed the production phase . 25
6.1 General . 25
6.2 Routine test . 25
6.3 Sampling test . 26
7 Modifications . 26
Annex A (informative) Guidelines for the selection of the class of electrical insulating
matting in relation to nominal voltage of a system . 27
Annex B (normative) Suitable for live working, double triangle
(IEC 60417-5216:2002-10) . 28
Annex C (informative)  In-service care and testing . 29
C.1 General . 29
C.2 Storage . 29
C.3 Marking on matting of small dimensions cut from rolls . 29
C.4 Examination before use . 29
C.5 Temperature . 29
C.6 Precautions in use . 30
C.7 Periodic inspection and testing . 30
C.7.1 General . 30
C.7.2 Check-in . 31
C.7.3 Cleaning . 31
C.7.4 Preliminary visual inspection . 31
C.7.5 Electrical test . 31
C.7.6 Final visual inspection. . 32
C.7.7 Record-keeping and marking or stamping . 32
C.7.8 Packing for storage or shipment . 32
Annex D (normative) General type test procedure . 33
D.1 General . 33
D.2 Group size requirements . 34
D.2.1 Group 1 . 34
D.2.2 Group 2 . 34
D.2.3 Group 3 . 34
D.2.4 Group 4 . 34
D.2.5 Group 5 . 34
Annex E (normative) Oil for tests for oil resistance . 35
E.1 Particularities of liquid 102 . 35
E.2 Characteristics of oil no. 1 . 35
Annex F (normative) Classification of defects and tests to be allocated . 36
Annex G (informative) Rationale for the classification of defects . 37
Bibliography . 38

Figure 1 – Test plates and needle for resistance to mechanical puncture . 16
Figure 2 – Test for slip resistance . 18
Figure 3 – Test set-up for voltage proof test of electrical insulating matting with
standard type of electrodes . 19
Figure 4 – Test set-up for voltage withstand test . 20
Figure 5 – Test set-up for low and extremely low temperature folding tests . 23
Figure 6 – Example of test set-up for testing the entire length of each roll . 25

Table 1 – Classes and maximum use voltages for electrical insulating matting . 10
Table 2 – Maximum thickness for electrical insulating matting . 11
Table 3 – Maximum electrode clearance for proof tests. 19
Table 4 – Test voltages . 21
Table 5 – Sampling plan . 26
Table C.1 – Guide for periodic inspection and testing of matting . 30
Table C.2 – Voltage values for periodic testing . 32
Table D.1 – List and chronological order of type tests . 33
Table E.1 – Characteristics of oil no. 1 . 35
Table F.1 – Classification of defects and associated requirements and tests. 36
Table G.1 – Justification for the type of defect . 37

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Live working -
Electrical insulating matting
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 61111 has been prepared by IEC technical committee 78: Live Working. It is an
International Standard.
This third edition cancels and replaces the second edition published in 2009. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) review of the scope;
b) introduction of AC/DC use and AC use only;
c) verification of dated referenced standards;
d) improvement of the marking;
e) rewriting of the test for slip resistance;
f) updating the use of IEC 61318;
g) creation of an alternative test;
h) revision and updating of Annexes A, B, C, D, F, G.
The text of this International Standard is based on the following documents:
Draft Report on voting
78/1559/FDIS 78/1584/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
INTRODUCTION
This document has been prepared according to the requirements of IEC 61477 where
applicable.
The product covered by this document can have an impact on the environment during some or
all stages of its life cycle. These impacts can range from slight to significant, be of short-term
or long-term, and occur at the global, regional or local level.
Except for a disposal statement in the instructions for use, this document does not include
requirements and test provisions for the manufacturers of the product, or recommendations to
the users of the product for environmental improvement. However, all parties intervening in its
design, manufacture, packaging, distribution, use, maintenance, repair, reuse, recovery and
disposal are invited to take account of environmental considerations.

1 Scope
This document is applicable to electrical insulating matting made of flexible insulating material
for use as a covering of the surface on which the worker is positioned and for worker´s electrical
protection on electrical installations up to 36 000 V AC for AC use or 36 000 V AC and
54 000 V DC for AC/DC use.
NOTE 1 The electric potential of the surface on which the worker is positioned is usually that of earth.
NOTE 2 See 4.2 for maximum use voltage.
NOTE 3 DC only rated matting is not specified in this document.
NOTE 4 This document does not cover the use of insulating blankets (see IEC 61112)
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60060-1, High-voltage test techniques - Part 1: General terminology and test requirements
IEC 60060-2, High-voltage test techniques - Part 2: Measuring systems
IEC 60068-1, Environmental testing - Part 1: General and guidance
IEC 60212, Standard conditions for use prior to and during the testing of solid electrical
insulating materials
IEC 61318, Live Working - Methods for assessment of defects and verification of performance
applicable to tools, devices and equipment
IEC 61477, Live working - Minimum requirements for the utilization of tools, devices and
equipment
ISO 2592, Petroleum and related products - Determination of flash and fire points - Cleveland
open cup method
ISO 2977, Petroleum products and hydrocarbon solvents - Determination of aniline point and
mixed aniline point
ISO 3104, Petroleum products - Transparent and opaque liquids - Determination of kinematic
viscosity and calculation of dynamic viscosity
ISO 4649:2017, Rubber, vulcanized or thermoplastic - Determination of abrasion resistance
using a rotating cylindrical drum device
ISO 23529, Rubber - General procedures for preparing and conditioning test pieces for physical
test methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61318 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
– ISO Online browsing platform: available at https://www.iso.org/obp
– IEC Electropedia: available at http://www.electropedia.org/
3.1
disruptive discharge
passage of an electric arc following electric breakdown
Note 1 to entry: The term “sparkover” is used when a disruptive discharge occurs in a gaseous or liquid dielectric.
Note 2 to entry: The term “flashover” is used when a disruptive discharge occurs at least partly along the surface
of a solid dielectric surrounded by a gaseous or liquid medium.
Note 3 to entry: The term “puncture” is used when a disruptive discharge occurs through a solid dielectric producing
permanent damage.
[SOURCE: IEC 60050-212:2010, 212-11-46, modified – Note to entry deleted and replaced by
notes to entry 1,2 and 3]
3.2
elastomer
macromolecular material which returns after substantial deformation by a weak stress and
release of the stress rapidly to approximately its initial dimensions and shape
Note 1 to entry: The definition applies to room temperature test conditions.
Note 2 to entry: Elastomer is a generic term that includes rubber, latex and elastomeric compounds that may be
natural or synthetic or a mixture or a combination of both. It also includes thermoplastic elastomer (TPE) material.
[SOURCE: IEC 60050-212:2010, 212-14-05, modified – Note 2 to entry has been added.]
3.3
electrical insulating matting
flat protective cover made of flexible insulating material, used to provide electrical insulation
between the feet of the worker and the surface on which the worker is standing
Note 1 to entry: The electric potential of the surface on which the worker is standing is usually that of earth.
[SOURCE: IEC 60050-651:2014, 651-22-13, modified – Note 2 to entry has been deleted]
3.4
international rubber hardness degree
IRHD
measure of hardness, the magnitude of which is derived from the depth of penetration of a
specified indentor into a test piece under specified conditions
Note 1 to entry: The IRHD scale is such that 0 degrees represents a material showing no measurable resistance
to indentation and 100 degrees represents a material showing no measurable indentation. The scale is described
fully in ISO 48.
[SOURCE: ISO 1382:2020, 3.264]
3.5
nominal voltage of a system
suitable approximate value of voltage used to designate or identify a system
[SOURCE: IEC 60050-601:1985, 601-01-21]
3.6
proof test
test to demonstrate the safety of the equipment for work by evaluating the
capability of the insulating material or product under prescribed test conditions to conform with
applicable rating
Note 1 to entry: An AC proof test typically involves applying a voltage corresponding to a temporary overvoltage
higher than the equipment's nominal operating voltage for a specified period.
Note 2 to entry: A DC proof test typically involves applying a voltage value gain from long time in-service testing
experience corresponding to DC voltage level able to find harmful physical irregularities in insulating material with
sufficient safety margin.
3.7
proof test voltage
specified voltage that is applied to a device or test piece for the time defined under specified
conditions to assure that the electrical strength of the insulation is above the applicable rating
3.8
routine test
conformity test made on each individual item during or after manufacture
[SOURCE: IEC 60050-151:2001, 151-16-17]
3.9
withstand test
test on insulating material or product made by applying a high voltage
across the insulation to determine the adequacy of the dielectric strength
Note 1 to entry: The dielectric strength includes the material integrity.
Note 2 to entry: An AC withstand test typically involves applying a high voltage stress corresponding to a switching
overvoltage.
Note 3 to entry: The value of the DC withstand test is gain from the experience testing and the knowledge of the
insulating material quality and integrity.
3.10
withstand test voltage
voltage that a test piece is required to withstand without disruptive discharge or other electric
failure when voltage is applied under specified conditions
4 Requirements
4.1 General
Electrical insulating matting shall be designed and manufactured to contribute to the safety of
the users provided they are used by skilled persons, in accordance with safe methods of work
and the instructions for use.
4.2 Electrical classification
The electrical insulating matting covered by this document shall be designated as follows:
– by electrical class as given in Table 1
Table 1 – Classes and maximum use voltages for electrical insulating matting
Class Maximum use voltages for AC/DC used matting Maximum use voltage for AC only
used matting
0 1 000 V AC / 1 500 V DC 1 000 V
1 7 500 V AC / 11 250 V DC 7 500 V
2 17 000 V AC / 25 500 V DC 17 000 V
3 26 500 V AC / 39 750 V DC 26 500 V
4 36 000 V AC / 54 000 V DC 36 000 V

– by adding the suffix “C” to the class designation, in case of category C matting (resistance
to extremely low temperature).
Additional guidance for the selection of electrical class is given in Annex A.
4.3 Physical requirements
4.3.1 Composition
The electrical insulating matting shall be manufactured of flexible insulating material such as
elastomer.
Both sides of the electrical insulating matting shall be slip resistant. The slip resistance can be
achieved with surface such as corrugated or diamond design.
Any insert shall not adversely affect the dielectric characteristics of the electrical insulating
matting.
4.3.2 Shape
There is no requirement for the shape of the electrical insulating matting.
Electrical insulating matting can be supplied in either portable style or stationary style (in roll)
to be cut for individual applications.
4.3.3 Dimensions and tolerances
4.3.3.1 Length and width
Electrical insulating matting of class 0,1 and 2 shall not have length and width less than 600 mm.
Electrical insulating matting of class 3 and 4 shall not have length and width less than 914 mm.
Manufacturers shall provide the dimensions of the matting length and width. These dimensions
for each matting shall be within a tolerance up to ±2 % of the stated dimensions.
Portable matting shall have maximum dimensions of (width x length) less than or equal to
1 220 × 2 000 mm.
Stationary matting shall have longitudinal length above 2 000 mm.
4.3.3.2 Maximum thickness
The maximum thickness of matting shall be as given in Table 2 in order to obtain appropriate
flexibility.
Table 2 – Maximum thickness for electrical insulating matting
Class mm
0 6,0
1 6,0
2 8,0
3 11,0
4 14,0
When corrugations or diamonds are present, measurements shall be made over the
corrugations or diamonds. The corrugations shall not be more than 3 mm deep. The
corrugations of the matting on one side of the matting do not line up with corrugations on the
other surface of the matting. The diamonds shall not be higher than 2 mm.
4.3.3.3 Minimum thickness
The minimum thickness shall be determined only by the ability to pass the tests defined in
Clause 5.
4.3.4 Temperature
Standard electrical insulating matting shall be designed to be used in applications having
ambient temperatures between -25 °C and +55 °C and category C matting in ambient
temperatures between -40 °C and + 55 °C.
4.3.5 Workmanship and finish
Electrical insulating matting shall be free on both surfaces from harmful physical irregularities
that can be detected by thorough test or inspection.
Harmful physical irregularities are those defined as any feature that disrupts the uniform,
smooth surface contour, such as pinholes, cracks, blisters, cuts, conductive embedded foreign
matter, creases, pinch marks, voids (entrapped air). Prominent ripples and prominent molded
marks shall not be acceptable.
Non-harmful physical irregularities are those defined as surface irregularities present on either
surface of the matting due to imperfections on forms or molds or other imperfections inherent
to the manufacturing process. These irregularities may be considered acceptable provided that:
a) the thickness at any irregularity conforms to the thickness requirements. Surface design to
improve slip resistance shall not be considered as an irregularity;
b) the indentations, protuberances or mold marks blend into a smooth slope upon stretching
of the material mechanical, climatic and environmental requirements.
Any additions to the matting for marking or traceability e.g. identification tags or microchips can
be considered as non-harmful irregularities as long as the matting fulfils the dielectric and
mechanical requirements contained in subclauses 4.1 through 4.3.4, 4.4 and 4.5.
4.4 Mechanical, climatic and environmental requirements
Electrical insulating matting shall support the mechanical, climatic and environmental stresses
occurring during normal working conditions.
All electrical insulating matting shall be:
– resistant to puncture and verified by test of 5.5.2 and 5.7;
– flame retardant and verified by test of 5.8.1;
– resistant to acid and verified by test of 5.9;
– resistant to oil and verified by test of 5.10;
– resistant to low temperature and verified by test of 5.8.2 (except for category C).
Category C electrical insulating matting shall be resistant to extremely low temperature and
verified by test of 5.8.3.
4.5 Dielectric requirements
Electrical insulating matting shall be capable of withstanding the corresponding electrical
stresses according to its electrical class.
4.6 Marking
Electrical insulating matting complying with the requirements of this document shall be marked
on the product with the following items of marking:
– name, trademark or identification of the manufacturer;
– symbol IEC 60417-5216:2002-10 (Suitable for live working, double triangle), see Annex B;
NOTE The exact ratio of the height of the figure to the base of the triangle is 1,43. For the purpose of convenience,
this ratio can be between the values of 1,4 and 1,5.
– number of the relevant IEC standard immediately adjacent to the symbol, with year of
publication (4 digits);
– month and year of manufacture;
– category C if applicable;
– electrical class designation;
– AC/DC, or AC according to the expected use;
– in the case of matting in rolls, these items of marking shall appear at least every 0,6 meter.
Any additional item of marking shall be subject to agreement between the manufacturer and the
customer.
The marking shall be clearly identifiable by persons with normal or corrected sight without
further magnification; be clearly visible, durable and shall not impair the quality of the electrical
insulating matting.
When a colour code for labels or space is used, the marking shall correspond to the following
code:
Class 0: red,
Class 1: white,
Class 2: yellow,
Class 3: green,
Class 4: orange.
4.7 Packaging
Electrical insulating matting shall be supplied in suitable packaging for shipping and initial
storage to provide protection until it is opened for use.
The outside of the container or package shall be marked with at least the following information:
– product name and reference or catalog number for example;
– number of the relevant IEC standard immediately adjacent to the symbol with year of
publication (4 digits);
– electrical class designation;
– AC/DC or AC according to the expected use;
– dimensions (length and width) of the product.
4.8 Instructions for use
The manufacturer shall provide written instructions for use with each consignment of electrical
insulating matting covered by this document.
These instructions shall be prepared in accordance with the general provisions of IEC 61477.
The instructions for use shall include as a minimum, information such as storage, handling,
disposal and periodic testing.
The instructions for use shall inform the users about critical hazards the manufacturer is aware
of and offer relevant recommendations, but without intruding into the area of work procedures
(for example, recommendation in case of overlapping matting). Additional information is given
in Annex C.
5 Type tests
5.1 General
This document provides testing provisions to demonstrate compliance of the product to the
requirements of Clause 4. These testing provisions are primarily intended to be used as type
tests for validation of the design input.
The allocation of the electrical insulating matting into various test groups, the quantity required
and the order in which the type tests are carried out are given in Annex D.
The test location conditions shall be in accordance with IEC 60068-1:
− ambient temperature: 15 °C to 35 °C;
− relative humidity: 25 % to 75 %;
− atmospheric pressure: 86 kPa to 106 kPa.
For type tests, electrical insulating matting or test pieces shall be conditioned for a period of
2 h ± 0,5 h at a temperature of 23 °C ± 2 °C and relative humidity of 50 % ± 5 % according to
IEC 60212 standard atmosphere B, unless otherwise specified.
The tolerances for any measured value shall be ±5 %, unless otherwise specified.
5.2 Visual inspection and measurements
5.2.1 General
Visual inspection shall be carried out by people with normal or corrected sight without further
magnification.
5.2.2 Classification
The matting shall be checked by visual inspection to ensure that the requirements of 4.2 are
fulfilled.
5.2.3 Composition
The matting shall be checked by visual inspection to ensure that the requirements of 4.3.1 are
fulfilled.
5.2.4 Dimensions, workmanship and finish
The product length and width provided by the manufacturer shall be verified with the electrical
insulating matting in a flattened condition.
The test shall be considered as passed if the requirements of 4.3.3.1 are satisfied.
The workmanship and finish shall be verified by visual inspection. Where matting is supplied in
a roll, a length of 2 m shall be submitted for inspection.
The inspection shall be considered as passed if the requirements of 4.3.5 are satisfied.
5.2.5 Thickness
Thickness measurements shall be made at five points approximately uniformly distributed over
the total area of the electrical insulating matting. Where matting is supplied in a roll, a length of
2 m shall be submitted to test.
Measurements shall be made with a commercial device designed for use on flexible materials
and that measures the maximum thickness with an accuracy of 0,03 mm. Sufficient support
shall be given to the matting so that it will present an unstressed flat surface at the measurement
point.
According to ISO 23529, the pressure exerted by the presser foot of the measuring device shall
be 22 kPa ± 5 kPa for matting material having a hardness equal to or greater than 35 IRHD,
and 10 kPa ± 2 kPa for matting material having a hardness less than 35 IRHD.
The test shall be considered as passed if the requirements of 4.3.3.2 are satisfied.
5.3 Marking
5.3.1 Visual inspection and measurement
The marking requirements of 4.6 shall be verified by visual inspection. Where matting is
supplied in a roll, a length of 2 m shall be submitted to inspection.
5.3.2 Durability of marking
The durability of the items marked on the electrical insulating matting shall be checked by
rubbing vigorously for 15 s with a piece of lint-free cloth soaked in soapy water and then rubbing
it for a further 15 s with a piece of lint-free cloth soaked in isopropanol (CH -CH(OH)-CH ).
3 3
NOTE It is the employer’s duty to ensure that any relevant legislation and any specific safety instructions regarding
the use of this chemical are fully observed.
The test shall be considered as passed if the items of marking remain legible and the letters do
not smear.
For marking produced by an engraving or moulding process the test for durability is not
necessary.
5.4 Packaging and instructions for use
The packaging and complete supply of the information required in 4.7 and 4.8 shall be verified
by visual inspection.
5.5 Mechanical tests
5.5.1 General
All mechanical tests shall be performed on test pieces which have been conditioned by storing
each separately in a flat, horizontal position for at least 24 h at a temperature of 23 °C ± 2 °C
and relative humidity of 50 % ± 5 % according to IEC 60212 standard atmosphere B. Where
matting is supplied in rolls, the material taken from the roll necessary to prepare the test pieces
shall be cut before conditioning.
NOTE The properties of vulcanized elastomeric material change continuously with time, these changes being
particularly rapid in the period immediately following vulcanization.
5.5.2 Mechanical puncture resistance
This test shall be carried out on both sides of the matting.
Two circular test pieces 50 mm in diameter shall be cut from the electrical insulating matting
and each shall be clamped between two flat 50 mm diameter test plates such that one test piece
is perforated from one side and the other test piece is perforated from the other side. The top
plate shall have a circular opening 6 mm in diameter and the bottom plate a 25 mm diameter
circular opening. The edges of both openings shall be rounded to a radius of 0,8 mm
(see Figure 1).
A needle shall be produced from a 5 mm diameter metallic rod and one end shall be machined
to produce a taper with an included angle of 12° and with the tip rounded to a radius of 0,8 mm
(see Figure 1). The needle shall be clean at time of use.
The needle shall be positioned perpendicularly above the test piece (clamped between the
plates) and shall be driven into and through the specimen. The rate of traverse shall be
500 mm/min ± 50 mm/min. The force required to perform the puncture shall be measured and
registered.
The test shall be considered as passed if the puncture resistance is greater than 70 N.
Dimensions in millimetres except for angles

Key
1 Top plate
2 Bottom plate
3 Needle
Figure 1 – Test plates and needle for resistance to mechanical puncture
5.5.3 Test for slip resistance
5.5.3.1 General
The test shall be carried out on one test piece of insulating electrical matting of
600 mm × 600 mm.
5.5.3.2 Test apparatus
A suitable test apparatus is shown in Figure 2. The construction of the test apparatus is left to
the initiative of the person carrying out the test.
5.5.3.3 Friction piece
A suitable friction piece is composed of a cuboid metal block and an elastomeric pad stuck
together:
– bearing-surface area: 100 mm × 100 mm with a tolerance of ±1 mm;
– material of the bearing-surface area: stainless steel for general use (such as martensitic),
with a minimum chromium (Cr) content of 12 % (to avoid oxidation);
– the elastomeric pad to be used under the friction piece shall be made in accordance with
the standardized rubber defined in ISO 4649:2017, B.2, with dimensions of:
• 98 mm ± 1 mm in diameter;
• maximum of 8 mm and a minimum of 2 mm in thickness;
• chamfer 45° machined on the pad;
– mass of the total friction piece: 5 kg ± 5 g.
5.5.3.4 Pulling cord
The pulling cord shall be made of stainless-steel wire rope grade 304 (or 316) with a diameter
of 5 mm with 6 strands of 7 wires.
The pulling cord shall be attached at 1/3 of the height of the friction piece, centered vertically
to the friction piece as shown in Figure 2.
The pulling cord length shall be between 1 000 mm and 4 000 mm at the starting point of the
test.
5.5.3.5 Substrate
...

IEC 61111 ®
Edition 3.0 2026-09
NORME
INTERNATIONALE
Travaux sous tension - Tapis isolants électriques

ICS 13.260; 29.240.20; 29.260.99 ISBN 978-2-8327-1470-6

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SOMMAIRE
AVANT-PROPOS . 4
INTRODUCTION . 6
1 Domaine d’application . 7
2 Références normatives . 7
3 Termes et définitions . 8
4 Exigences . 9
4.1 Généralités . 9
4.2 Classification électrique . 10
4.3 Exigences physiques . 10
4.3.1 Composition . 10
4.3.2 Forme . 10
4.3.3 Dimensions et tolérances . 11
4.3.4 Température . 11
4.3.5 Façon et finition . 11
4.4 Exigences mécaniques, climatiques et environnementales . 12
4.5 Exigences diélectriques . 12
4.6 Marquage . 12
4.7 Emballage . 13
4.8 Instructions d’emploi . 13
5 Essais de type . 13
5.1 Généralités . 13
5.2 Examens visuels et dimensionnels . 14
5.2.1 Généralités . 14
5.2.2 Classification . 14
5.2.3 Composition . 14
5.2.4 Dimensions, façon et finition . 14
5.2.5 Épaisseur . 14
5.3 Marquage . 15
5.3.1 Examens visuel et dimensionnel . 15
5.3.2 Durabilité du marquage . 15
5.4 Emballage et instructions d’emploi . 15
5.5 Essais mécaniques . 15
5.5.1 Généralités . 15
5.5.2 Résistance mécanique à la perforation . 15
5.5.3 Essai de résistance au glissement . 17
5.6 Essais diélectriques . 18
5.6.1 Généralités . 18
5.6.2 Électrodes . 19
5.6.3 Appareillage d’essai . 21
5.6.4 Procédure d’essai électrique . 21
5.7 Essai de vieillissement . 22
5.8 Essais thermiques. 22
5.8.1 Essai de non-propagation de la flamme . 22
5.8.2 Essai de pliage à température basse (sauf pour les tapis de
catégorie C) . 23
5.8.3 Essai de pliage à une température extrêmement basse pour les tapis de

catégorie C uniquement . 24
5.9 Résistance à l’acide . 25
5.10 Résistance à l’huile . 25
6 Méthodes d’évaluation des défauts et vérification des performances applicables
aux tapis isolants électriques issus de production . 25
6.1 Généralités . 25
6.2 Essais individuels de série . 26
6.3 Essai d’échantillonnage . 27
7 Modifications . 27
Annexe A (informative) Lignes directrices pour le choix de la classe de tapis isolants
électriques en fonction de la tension nominale d’un réseau . 28
Annexe B (normative) Approprié aux travaux sous tension; double triangle
(IEC 60417-5216:2002-10) . 29
Annexe C (informative)  Précautions d’emploi et essais . 30
C.1 Généralités . 30
C.2 Stockage. 30
C.3 Marquage sur les tapis de faibles dimensions découpés dans des rouleaux . 30
C.4 Examen avant utilisation . 30
C.5 Température . 31
C.6 Précautions d’emploi . 31
C.7 Examen et essais périodiques . 31
C.7.1 Généralités . 31
C.7.2 Enregistrement . 32
C.7.3 Nettoyage . 32
C.7.4 Examen visuel préliminaire . 32
C.7.5 Essai électrique . 33
C.7.6 Examen visuel final . 33
C.7.7 Gestion des enregistrements et marquage ou estampillage . 33
C.7.8 Emballage pour stockage ou expédition . 34
Annexe D (normative) Procédure générale des essais de type . 35
D.1 Généralités . 35
D.2 Exigences pour la taille de groupe . 36
D.2.1 Groupe 1 . 36
D.2.2 Groupe 2 . 36
D.2.3 Groupe 3 . 36
D.2.4 Groupe 4 . 36
D.2.5 Groupe 5 . 36
Annexe E (normative) Huile pour essais de résistance à l’huile . 37
E.1 Particularités du liquide 102 . 37
o
E.2 Caractéristiques de l’huile de référence n 1 . 37
Annexe F (normative) Classification des défauts et essais à assigner . 38
Annexe G (informative) Justification de la classification des défauts . 39
Bibliographie . 40

Figure 1 – Disques d’essai et aiguille pour l’essai de résistance mécanique à la
perforation . 16
Figure 2 – Essai de résistance au glissement . 18
Figure 3 – Montage d’essai pour l’essai de tension d’épreuve de tapis isolants
électriques en utilisant des électrodes normales . 19
Figure 4 – Montage d’essai pour l’essai de tension en tenue . 20
Figure 5 – Montage d’essai pour l’essai de pliage à température basse et extrêmement
basse . 24
Figure 6 – Exemple de montage d’essai pour soumettre à essai toute la longueur de
chaque rouleau . 26

Tableau 1 – Classes et tensions maximales d’utilisation pour les tapis isolants
électriques . 10
Tableau 2 – Épaisseur maximale pour les tapis isolants électriques . 11
Tableau 3 – Distance d’isolement dans l’air maximale entre électrodes pour les essais
d’épreuve . 20
Tableau 4 – Tensions d’essai. 21
Tableau 5 – Plan d’échantillonnage . 27
Tableau C.1 – Guide pour l’examen périodique et les essais des tapis . 32
Tableau C.2 – Valeurs de tension pour les essais périodiques . 33
Tableau D.1 – Liste et ordre chronologique de réalisation des essais de type . 35
o
Tableau E.1 – Caractéristiques de l’huile de référence n 1 . 37
Tableau F.1 – Classification des défauts et exigences et essais associés . 38
Tableau G.1 – Justification du type de défaut . 39

COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
Travaux sous tension -
Tapis isolants électriques
AVANT-PROPOS
1) La Commission Électrotechnique Internationale (IEC) est une organisation mondiale de normalisation composée
de l’ensemble des comités électrotechniques nationaux (Comités nationaux de l’IEC). L’IEC a pour objet de
favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines de
l’électricité et de l’électronique. À cet effet, l’IEC – entre autres activités – publie des Normes internationales,
des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au public (PAS) et des
Guides (ci-après dénommés "Publication(s) de l’IEC"). Leur élaboration est confiée à des comités d’études, aux
travaux desquels tout Comité national intéressé par le sujet traité peut participer. Les organisations
internationales, gouvernementales et non gouvernementales, en liaison avec l’IEC, participent également aux
travaux. L’IEC collabore étroitement avec l’Organisation Internationale de Normalisation (ISO), selon des
conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de l’IEC concernant les questions techniques représentent, dans la mesure du
possible, un accord international sur les sujets étudiés, étant donné que les Comités nationaux de l’IEC intéressés
sont représentés dans chaque comité d’études.
3) Les Publications de l’IEC se présentent sous la forme de recommandations internationales et sont agréées
comme telles par les Comités nationaux de l’IEC. Tous les efforts raisonnables sont entrepris afin que l’IEC
s’assure de l’exactitude du contenu technique de ses publications; l’IEC ne peut pas être tenue responsable de
l’éventuelle mauvaise utilisation ou interprétation qui en est faite par un quelconque utilisateur final.
4) Dans le but d’encourager l’uniformité internationale, les Comités nationaux de l’IEC s’engagent, dans toute la
mesure possible, à appliquer de façon transparente les Publications de l’IEC dans leurs publications nationales
et régionales. Toutes divergences entre toutes Publications de l’IEC et toutes publications nationales ou
régionales correspondantes doivent être indiquées en termes clairs dans ces dernières.
5) L’IEC elle-même ne fournit aucune attestation de conformité. Des organismes de certification indépendants
fournissent des services d’évaluation de conformité et, dans certains secteurs, accèdent aux marques de
conformité de l’IEC. L’IEC n’est responsable d’aucun des services effectués par les organismes de certification
indépendants.
6) Tous les utilisateurs doivent s’assurer qu’ils sont en possession de la dernière édition de cette publication.
7) Aucune responsabilité ne doit être imputée à l’IEC, à ses administrateurs, employés, auxiliaires ou mandataires,
y compris ses experts particuliers et les membres de ses comités d’études et des Comités nationaux de l’IEC,
pour tout préjudice causé en cas de dommages corporels et matériels, ou de tout autre dommage de quelque
nature que ce soit, directe ou indirecte, ou pour supporter les coûts (y compris les frais de justice) et les dépenses
découlant de la publication ou de l’utilisation de cette Publication de l’IEC ou de toute autre Publication de l’IEC,
ou au crédit qui lui est accordé.
8) L’attention est attirée sur les références normatives citées dans cette publication. L’utilisation de publications
référencées est obligatoire pour une application correcte de la présente publication.
9) L’IEC attire l’attention sur le fait que la mise en application du présent document peut entraîner l’utilisation d’un
ou de plusieurs brevets. L’IEC ne prend pas position quant à la preuve, à la validité et à l’applicabilité de tout
droit de brevet revendiqué à cet égard. À la date de publication du présent document, l’IEC n’avait pas reçu
notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa mise en application. Toutefois, il y a lieu
d’avertir les responsables de la mise en application du présent document que des informations plus récentes
sont susceptibles de figurer dans la base de données de brevets, disponible à l’adresse https://patents.iec.ch.
L’IEC ne saurait être tenue pour responsable de ne pas avoir identifié de tels droits de brevet.
L’IEC 61111 a été établie par le comité d’études 78 de l’IEC: Travaux sous tension. Il s’agit
d’une Norme internationale.
Cette troisième édition annule et remplace la deuxième édition parue en 2009. Cette édition
constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition
précédente:
a) revue du domaine d’application;
b) introduction de l’utilisation en courant alternatif/continu et de l’utilisation en courant
alternatif seulement;
c) vérification des normes référencées datées;
d) amélioration du marquage;
e) reformulation de l’essai de résistance au glissement;
f) mise à jour de l’utilisation de l’IEC 61318;
g) création d’un essai alternatif;
h) révision et mise à jour des Annexes A, B, C, D, F, G.
Le texte de cette Norme internationale est issu des documents suivants:
Projet Rapport de vote
78/1559/FDIS 78/1584/RVD
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à son approbation.
La langue employée pour l’élaboration de cette Norme internationale est l’anglais.
Ce document a été rédigé selon les Directives ISO/IEC, Partie 2, il a été développé selon les
Directives ISO/IEC, Partie 1 et les Directives ISO/IEC, Supplément IEC, disponibles sous
www.iec.ch/members_experts/refdocs. Les principaux types de documents développés par
l’IEC sont décrits plus en détail sous www.iec.ch/publications.
Le comité a décidé que le contenu de ce document ne sera pas modifié avant la date de stabilité
indiquée sur le site web de l’IEC sous webstore.iec.ch dans les données relatives au document
recherché. À cette date, le document sera
– reconduit,
– supprimé, ou
– révisé.
INTRODUCTION
Le présent document a été établi en conformité avec les exigences de l’IEC 61477, lorsque
celles-ci sont applicables.
Le produit couvert par le présent document peut avoir un impact sur l’environnement pendant
certaines ou à toutes les étapes de son cycle de vie. Ces impacts peuvent être légers ou
importants, à court ou à long terme et se produire à un niveau local, régional ou global.
À part une exigence relative à un énoncé de mise au rebut à inclure dans les instructions
d’emploi, le présent document ne contient pas d’exigences et de dispositions d’essai
s’adressant au fabricant, ou de recommandations aux utilisateurs du produit ayant pour but
d’améliorer l’environnement. Cependant, tous les intervenants à sa conception, sa fabrication,
son emballage, sa distribution, son utilisation, son entretien, sa réparation, sa réutilisation,
sa récupération et sa mise au rebut sont invités à prendre en compte les questions liées à
l’environnement.
1 Domaine d’application
Le présent document s’applique aux tapis isolants électriques en matériau isolant souple
utilisés comme revêtement de la surface sur laquelle se tient le travailleur et comme protection
électrique du travailleur sur des installations électriques allant jusqu’à 36 000 V en courant
alternatif pour une utilisation en courant alternatif ou 36 000 V en courant alternatif et 54 000 V
en courant continu pour une utilisation en courant alternatif/continu.
NOTE 1 Le potentiel électrique de la surface sur laquelle se tient le travailleur est généralement celui de la terre.
NOTE 2 Voir 4.2 en ce qui concerne la tension maximale d’utilisation.
NOTE 3 Les tapis pour courant continu uniquement ne sont pas spécifiés dans le présent document.
NOTE 4 Le présent document ne traite pas de l’utilisation de nappes isolantes (voir IEC 61112).
2 Références normatives
Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie
de leur contenu, des exigences du présent document. Pour les références datées, seule
l’édition citée s’applique. Pour les références non datées, la dernière édition du document de
référence s’applique (y compris les éventuels amendements).
IEC 60060-1, Technique des essais à haute tension - Partie 1: Terminologie générale et
exigences d'essai
IEC 60060-2, Technique des essais à haute tension - Partie 2: Systèmes de mesure
IEC 60068-1, Essais d’environnement - Partie 1: Généralités et lignes directrices
IEC 60212, Conditions normales à observer avant et pendant les essais de matériaux isolants
électriques solides
IEC 61318, Travaux sous tension - Méthodes d’évaluation des défauts et vérification des
performances applicables aux outils, dispositifs et équipement
IEC 61477, Travaux sous tension - Exigences minimales pour l’utilisation des outils, dispositifs
et équipements
ISO 2592, Pétrole et produits connexes - Détermination des points d’éclair et de feu - Méthode
Cleveland à vase ouvert
ISO 2977, Produits pétroliers et solvants hydrocarbonés - Détermination du point d’aniline et
du point d’aniline en mélange
ISO 3104, Produits pétroliers - Liquides opaques et transparents - Détermination de la viscosité
cinématique et calcul de la viscosité dynamique
ISO 4649:2017, Caoutchouc vulcanisé ou thermoplastique - Détermination de la résistance à
l’abrasion à l’aide d’un dispositif à tambour tournant
ISO 23529, Caoutchouc - Procédures générales pour la préparation et le conditionnement des
éprouvettes pour les méthodes d’essais physiques
3 Termes et définitions
Pour les besoins du présent document, les termes et les définitions de l’IEC 61318 ainsi que
les suivants s’appliquent.
L’ISO et l’IEC tiennent à jour des bases de données terminologiques destinées à être utilisées
en normalisation, consultables aux adresses suivantes:
– ISO Online browsing platform: disponible à l’adresse https://www.iso.org/obp
– IEC Electropedia: disponible à l’adresse http://www.electropedia.org/
3.1
décharge disruptive
passage d’un arc électrique à la suite d’un claquage électrique
Note 1 à l’article: Le terme "amorçage" est utilisé lorsque la décharge disruptive se produit dans un diélectrique
gazeux ou liquide.
Note 2 à l’article: Le terme "contournement" est utilisé lorsque la décharge disruptive longe au moins en partie la
surface d’un diélectrique solide entouré d’un gaz ou d’un liquide isolant.
Note 3 à l’article: Le terme "perforation" est utilisé lorsque la décharge disruptive se produit à travers un diélectrique
solide entraînant un dommage permanent.
[SOURCE: IEC 60050-212:2010, 212-11-46, modifié – La note a été supprimée et remplacée
par les notes 1, 2 et 3 à l’article]
3.2
élastomère
matière macromoléculaire qui retourne rapidement et approximativement à sa forme et à ses
dimensions initiales après cessation d’une contrainte faible ayant produit une déformation
importante
Note 1 à l’article: La définition s’applique pour des conditions d’essai à la température du laboratoire.
Note 2 à l’article: "Élastomère" est un terme général comprenant les caoutchoucs, les latex et les composés
élastomères pouvant être naturels ou synthétiques ou un mélange ou combinaison des deux. Il comprend aussi les
élastomères thermoplastiques (TPE).
[SOURCE: IEC 60050-212:2010, 212-14-05, modifié – La note 2 à l’article a été ajoutée]
3.3
tapis isolant électrique
protecteur plat réalisé en matériau isolant flexible, utilisé pour procurer une isolation électrique
entre les pieds du travailleur et la surface sur laquelle il se tient
Note 1 à l’article: Le potentiel électrique de la surface sur laquelle le travailleur se tient est habituellement celui de
la terre.
[SOURCE: IEC 60050-651:2014, 651-22-13, modifié – La note 2 à l’article a été supprimée]
3.4
degré international de dureté du caoutchouc
DIDC
mesure de la dureté, dont la grandeur dérive de la profondeur d’enfoncement, dans une
éprouvette, d’un pénétrateur prescrit dans des conditions spécifiées
Note 1 à l’article: L’échelle DIDC est telle que le degré 0 représente la dureté d’une matière n’opposant aucune
résistance appréciable à la pénétration, et le degré 100 la dureté d’une matière dans laquelle la pénétration est
négligeable. L’échelle est complètement décrite dans l’ISO 48.
[SOURCE: ISO 1382:2020, 3.264]
3.5
tension nominale d’un réseau
valeur arrondie appropriée de la tension utilisée pour dénommer ou identifier un réseau
[SOURCE: IEC 60050-601:1985, 601-01-21]
3.6
essai d’épreuve
essai visant à démontrer la sécurité de l’équipement pour le travail en
évaluant la capacité du matériau ou du produit isolant, dans des conditions d’essai prescrites,
à se conformer aux valeurs assignées applicables
Note 1 à l’article: Un essai d’épreuve en courant alternatif consiste généralement à appliquer une tension
correspondant à une surtension temporaire supérieure à la tension nominale de service de l’équipement pendant
une période donnée.
Note 2 à l’article: Un essai d’épreuve en courant continu consiste généralement à appliquer une valeur de tension
tirée de la longue expérience en matière d’essais en service, correspondant à un niveau de tension continue capable
de détecter des irrégularités physiques nuisibles dans le matériau isolant avec une marge de sécurité suffisante.
3.7
tension d’essai d’épreuve
tension spécifiée à laquelle est soumis un dispositif ou une éprouvette pour un temps et dans
des conditions spécifiées, dans le but de vérifier que la tenue électrique de l’isolation est
supérieure à la valeur assignée applicable
3.8
essai individuel de série
essai de conformité effectué sur chaque entité en cours ou en fin de fabrication
[SOURCE: IEC 60050-151:2001, 151-16-17]
3.9
essai de tenue
essai sur un matériau ou un produit isolants effectué en appliquant une
tension élevée sur l’isolant pour déterminer l’adéquation de la rigidité diélectrique
Note 1 à l’article: La rigidité diélectrique comprend l’intégrité du matériau.
Note 2 à l’article: Un essai de tenue en courant alternatif consiste généralement à appliquer une tension élevée
correspondant à une surtension de manœuvre.
Note 3 à l’article: La valeur de l’essai de tenue en courant continu est tirée de l’expérience en matière d’essais et
des connaissances sur la qualité et l’intégrité du matériau isolant.
3.10
tension d’essai de tenue
tension qu’une éprouvette est tenue de supporter sans produire de décharge disruptive ou autre
défaillance électrique lorsque cette tension est appliquée selon des conditions spécifiées
4 Exigences
4.1 Généralités
Les tapis isolants électriques doivent être conçus et fabriqués de façon à contribuer à la sécurité
des utilisateurs, sous réserve qu’ils soient utilisés par des personnes qualifiées, conformément
à des méthodes de travail en toute sécurité et aux instructions d’emploi.
4.2 Classification électrique
Les tapis isolants électriques qui font l’objet du présent document doivent être désignés comme
suit:
– par classe électrique telle que donnée dans le Tableau 1.
Tableau 1 – Classes et tensions maximales d’utilisation
pour les tapis isolants électriques
Classe Tensions maximales d'utilisation pour tapis utilisé Tension maximale d'utilisation pour
en courant alternatif/continu tapis utilisé uniquement en courant
alternatif
0 1 000 V en courant alternatif/1 500 V en courant 1 000 V
continu
7 500 V en courant alternatif/11 250 V en courant
1 7 500 V
continu
2 17 000 V en courant alternatif/25 500 V en courant 17 000 V
continu
3 26 500 V en courant alternatif/39 750 V en courant 26 500 V
continu
4 36 000 V en courant alternatif/54 000 V en courant 36 000 V
continu
– par l’adjonction du suffixe "C" à la classe, dans le cas de tapis de catégorie C (résistance à
une température extrêmement basse).
Des recommandations supplémentaires pour le choix de la classe électrique sont données à
l'Annexe A.
4.3 Exigences physiques
4.3.1 Composition
Les tapis isolants électriques doivent être fabriqués dans un matériau isolant souple tel que
l’élastomère.
Les deux surfaces d’un tapis isolant électrique doivent être résistantes au glissement.
La résistance au glissement peut être obtenue au moyen d’une surface à motif strié ou à pointe
de diamant.
Toute pièce incluse ne doit pas affecter négativement les caractéristiques diélectriques du tapis
isolant électrique.
4.3.2 Forme
Il n’y a pas d’exigence reliée à la forme des tapis isolants électriques.
Les tapis isolants électriques peuvent être fournis soit en version portable, soit en version fixe
(en rouleaux) à couper selon les applications particulières.
4.3.3 Dimensions et tolérances
4.3.3.1 Longueur et largeur
Les tapis isolants électriques de la classe 0,1 et 2 ne doivent pas avoir de longueur et de largeur
inférieures à 600 mm.
Les tapis isolants électriques de la classe 3 et 4 ne doivent pas avoir de longueur et de largeur
inférieures à 914 mm.
Les fabricants doivent fournir les valeurs de la longueur et la largeur des tapis. Pour chaque
tapis, ces dimensions doivent respecter une tolérance de ±2 % des dimensions déclarées.
Le tapis portable doit avoir des dimensions maximales de (largeur × longueur) inférieures ou
égales à 1 220 × 2 000 mm.
Le tapis fixe doit avoir une longueur longitudinale supérieure à 2 000 mm.
4.3.3.2 Épaisseur maximale
L’épaisseur maximale du tapis doit être celle donnée dans le Tableau 2, de manière à obtenir
la flexibilité appropriée.
Tableau 2 – Épaisseur maximale pour les tapis isolants électriques
Classe mm
0 6,0
1 6,0
2 8,0
3 11,0
4 14,0
Le cas échéant, les mesures doivent être faites au-dessus des stries ou des diamants.
Les stries ne doivent pas dépasser 3 mm de profondeur. Les stries du tapis d’un côté du
tapis ne correspondent pas aux stries de l’autre surface du tapis. Les diamants ne doivent pas
dépasser 2 mm de hauteur.
4.3.3.3 Épaisseur minimale
L’épaisseur minimale doit être déterminée uniquement par la possibilité de satisfaire aux essais
définis à l’Article 5.
4.3.4 Température
Les tapis isolants électriques normalisés doivent être conçus pour être utilisés dans des
applications ayant des températures ambiantes comprises entre –25 °C et +55 °C et les tapis
de catégorie C dans des températures ambiantes comprises entre –40 °C et +55 °C.
4.3.5 Façon et finition
Aucune des deux surfaces des tapis isolants électriques ne doit comporter d’irrégularités
nuisibles décelables par un essai ou un examen, approfondis.
Les irrégularités nuisibles telles que définies comme étant toutes les caractéristiques qui
rompent l’uniformité et la planéité de la surface et qui comportent, par exemple, des trous
d'épingle, des craquelures, des cloques, des coupures, des matières étrangères conductrices
incrustées, des faux plis, des traces de pincement, des vides (inclusion d’air). Des nervures
proéminentes ou des traces de moulage proéminentes ne doivent pas être acceptables.
Les irrégularités non nuisibles sont les irrégularités de surface présentes sur l’une ou l’autre
des surfaces du tapis dues aux imperfections des formes et des moules ou à d’autres
imperfections inhérentes aux procédés de fabrication. Ces irrégularités peuvent être
considérées comme acceptables à condition que:
a) l’épaisseur à toute irrégularité soit conforme aux exigences d’épaisseur. Le motif de surface
prévu pour améliorer la résistance au glissement ne doit pas être considéré comme une
irrégularité;
b) les saillies, protubérances ou marques de moulage tendent à se fondre en une surface lisse
lors de l’étirement du matériau.
Tout ajout au tapis pour le marquage ou la traçabilité, par exemple des étiquettes
d’identification ou des puces électroniques, peut être considéré comme une irrégularité non
nuisible tant que le tapis satisfait aux exigences diélectriques et mécaniques de 4.1 à 4.3.4,
4.4 et 4.5.
4.4 Exigences mécaniques, climatiques et environnementales
Les tapis isolants électriques doivent supporter les contraintes mécaniques, climatiques et
environnementales qui surviennent en utilisation normale.
Tous les tapis isolants électriques doivent être:
– résistants à la perforation et vérifiés par les essais de 5.5.2 et 5.7;
– ignifuges et vérifiés par l'essai de 5.8.1;
– résistants à l'acide et vérifiés par l'essai de 5.9;
– résistants à l'huile et vérifiés par l'essai de 5.10;
– résistants à une température basse et vérifiés par l'essai de 5.8.2 (sauf pour la catégorie C).
Les tapis isolants électriques de catégorie C doivent résister à une température extrêmement
basse et être vérifiés par l'essai de 5.8.3.
4.5 Exigences diélectriques
Les tapis isolants électriques doivent pouvoir supporter les contraintes électriques qui
correspondent à leur classe électrique.
4.6 Marquage
Les tapis isolants électriques qui satisfont aux exigences du présent document doivent porter
sur le produit lui-même, les éléments de marquage suivants:
– le nom, la marque de commerce ou l’identification du fabricant;
– le symbole IEC 60417-5216:2002-10 (Approprié aux travaux sous tension, double triangle),
voir l’Annexe B;
NOTE Le rapport exact de la hauteur du chiffre sur la base du triangle est de 1,43. Pour des raisons de commodité,
ce rapport peut être compris entre 1,4 et 1,5.
– le numéro de la norme IEC applicable immédiatement adjacent au symbole avec l’année de
publication (4 chiffres);
– le mois et l’année de fabrication;
– la catégorie, le cas échéant;
– la désignation de la classe électrique;
– courant alternatif/continu, ou courant alternatif selon l’usage attendu;
– dans le cas de tapis en rouleaux, ces éléments de marquage doivent apparaître au moins
tous les 0,6 m.
Tout élément de marquage supplémentaire doit faire l’objet d’un accord entre le fabricant et le
client.
Le marquage doit être clairement identifiable par les personnes ayant une vue normale ou
corrigée sans autre grossissement; être clairement visible, durable et ne doit pas altérer la
qualité du matelas isolant électrique.
Lorsqu’un code de couleur est utilisé pour les étiquettes ou les espaces, le marquage doit
correspondre au code suivant:
classe 0: rouge,
classe 1: blanc,
classe 2: jaune,
classe 3: vert,
classe 4: orange.
4.7 Emballage
Le tapis isolant électrique doit être fourni dans un emballage approprié pour la livraison et le
stockage initial de manière à les protéger jusqu’à l’ouverture de l’emballage pour usage.
L’extérieur d’un paquet ou d’un conteneur doit être marqué au moins des informations
suivantes:
– le nom et la référence du produit ou le numéro de catalogue, par exemple,
– le numéro de la norme IEC applicable immédiatement adjacent au symbole avec l’année de
publication (4 chiffres),
– la désignation de la classe électrique;
– courant alternatif/continu ou courant alternatif selon l’usage attendu;
– les dimensions (longueur et largeur) du produit.
4.8 Instructions d’emploi
Le fabricant doit fournir des instructions d’emploi écrites, pour chaque livraison de tapis isolants
électriques couverts par le présent document.
Ces instructions doivent être préparées en conformité avec les dispositions générales de
l’IEC 61477.
Les instructions d’emploi doivent inclure au moins des informations sur le stockage,
la manipulation, la mise au rebut, et les essais périodiques.
Les instructions d’emploi doivent informer les utilisateurs de toute situation dangereuse dont le
fabricant est informé et offrir des recommandations pertinentes, sans pour autant s’immiscer
dans les procédures de travail (par exemple des recommandations en cas de tapis qui se
chevauchent). Des informations supplémentaires sont données à l'Annexe C.
5 Essais de type
5.1 Généralités
Le présent document fournit les dispositions d’essai qui permettent de démontrer que le produit
satisfait aux exigences de l’Article 4. Ces dispositions d’essai sont principalement destinées à
être utilisées comme essais de type permettant de valider la conception.
L’Annexe D présente la répartition des tapis isolants électriques en différents groupes d’essai,
la quantité exigée, ainsi que l’ordre dans lequel les essais de type sont réalisés.
Les conditions des locaux d’essai doivent être conformes à l’IEC 60068-1:
− température ambiante: 15 °C à 35 °C,
− humidité relative: 25 % à 75 %,
− pression atmosphérique: 86 kPa à 106 kPa.
Pour les essais de type, les tapis isolants électriques ou les éprouvettes d’essai doivent être
conditionnées pendant (2 ± 0,5) h à une température de (23 ± 2) °C et une humidité relative de
(50 ± 5) % selon l’IEC 60212, atmosphère normale B, sauf spécification contraire.
La tolérance applicable sur toute valeur mesurée doit être ±5 %, sauf spécification contraire.
5.2 Examens visuels et dimensionnels
5.2.1 Généralités
L’examen visuel doit être réalisé par des personnes dont la vue est normale ou corrigée, sans
moyen de grossissement supplémentaire.
5.2.2 Classification
Un examen visuel doit permettre de s’assurer que les exigences de 4.2 concernant le tapis sont
satisfaites.
5.2.3 Composition
Un examen visuel doit permettre de s’assurer que les exigences de 4.3.1 concernant le tapis
sont satisfaites.
5.2.4 Dimensions, façon et finition
La longueur et la largeur du produit indiquées par le fabricant doivent être contrôlées lorsque
le tapis isolant électrique est déposé à plat.
L’essai doit être considéré comme réussi si les exigences de 4.3.3.1 sont satisfaites.
La façon et la finition doivent être vérifiées par un examen visuel. Si le tapis est fourni en
rouleau, une longueur de 2 m doit être soumise à l’examen.
L’examen doit être considéré comme satisfaisant si les exigences de 4.3.5 sont satisfaites.
5.2.5 Épaisseur
Les mesures d’épaisseur doivent être effectuées sur cinq points approximativement,
uniformément répartis sur la surface totale du tapis isolant électrique. Pour un tapis en rouleau,
une longueur de 2 m doit être soumise à l’essai.
Les mesures doivent être effectuées avec un dispositif disponible commercialement, conçu
pour un usage sur des matériaux flexibles et qui mesure l’épaisseur avec une précision de
0,03 mm. Il faut assurer au tapis isolant électrique un support suffisant pour qu’il présente une
surface plane, sans contraintes au point de mesure.
En conformité avec l’ISO 23529, la pression exercée par la pointe de pression du dispositif de
mesure doit être de (22 ± 5) kPa dans le cas du matériau de tapis ayant un degré de dureté
supérieur ou égal à 35 DIDC et de (10 ± 2) kPa dans le cas du matériau de tapis ayant un degré
de dureté inférieur à 35 DIDC.
L’essai doit être considéré comme réussi si les exigences de 4.3.3.2 sont satisfaites.
5.3 Marquage
5.3.1 Examens visuel et dimensionnel
Les exigences de marquage de 4.6 doivent être vérifiées par un examen visuel. Si le tapis est
fourni en rouleau, une longueur de 2 m doit être soumise à un examen.
5.3.2 Durabilité du marquage
La durabilité des éléments marqués sur le tapis isolant électrique doit être vérifiée en frottant
vigoureusement pendant 15 s avec un chiffon non pelucheux trempé dans de l’eau savonneuse,
puis en frottant à nouveau pendant 15 s avec un chiffon non pelucheux trempé dans de
l’isopropanol (CH -CH(OH)-CH ).
3 3
NOTE Il incombe à l’employeur de s’assurer que la législation applicable, ainsi que les instructions
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