Live working - Conductive clothing for use at nominal voltage up to 800 kV a.c. and ± 600 kV d.c.

Applicable to conductive clothing, either assembled from component parts or forming a single complete clothing, worn by (electrically) skilled persons during live working (especially bare-hand working) at a nominal power system voltage up to 800 kV a.c. and ±600 kV d.c. It is applicable to conductive jackets, trousers, coveralls (one-piece clothing), gloves or mitts, hoods, shoes, overshoe socks and socks. The main changes with respect to the previous edition are listed below: - the scope has been extended to cover the use of conductive clothing to ±600 kV d.c.; - revision of the electrical resistance requirements of the fabrics used in conductive clothing; - revision of the testing procedures for complete clothing.

Arbeiten unter Spannung - Leitfähige Kleidung für die Verwendung bei Nenn-Wechselspannungen bis 800 kV und Gleichspannungen bis 600 kV

Travaux sous tension - Vêtements conducteurs pour usage jusqu'à 800 kV de tension nominale en courant alternatif et ± 600 kV en courant continu

Applicable aux vêtements conducteurs, qu'ils soient constitués de plusieurs éléments ou d'une seule pièce, portés par des personnes (électriquement) qualifiées lorsqu'elles travaillent sous tension (en particulier lors du travail au potentiel) pour des tensions nominales allant jusqu'à 800 kV en courant alternatif et à ±600 kV en courant continu. Elle est applicable aux vestons, pantalons, combinaisons (d'une seule pièce), aux gants ou moufles, aux cagoules, aux chaussures, aux couvre-chaussures (chausses) et aux chaussettes conducteurs. La plupart des changements respectants l'édition précédante sont listées ci-dessous: - le domaine d'application a été étendu pour s'appliquer aux vêtements conducteurs utilisés à ±600 kV en courant continu; - révision des exigences de résistance électrique des matériaux utilisés pour les vêtements conducteurs; - révision des procédures d'essai pour les vêtements complets

Delo pod napetostjo – Prevodne obleke za uporabo pri nazivni izmenični napetosti do 800 kV in enosmerni napetosti ±600 kV (IEC 60895:2002, spremenjen)

General Information

Status
Published
Publication Date
26-Nov-2003
Current Stage
6060 - Document made available
Due Date
27-Nov-2003
Completion Date
27-Nov-2003

RELATIONS

Effective Date
16-Jun-2020

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SLOVENSKI SIST EN 60895:2004
STANDARD
februar 2004
Delo pod napetostjo – Prevodne obleke za uporabo pri nazivni izmenični
napetosti do 800 kV in enosmerni napetosti ±600 kV (IEC 60895:2002,
spremenjen)

Live working - Conductive clothing for use at nominal voltage up to 800 kV a.c. and

± 600 kV d.c.
ICS 13.260; 13.340.10 Referenčna številka
SIST EN 60895:2004(en)

© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

---------------------- Page: 1 ----------------------
NORME CEI
INTERNATIONALE IEC
60895
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2002-08
Travaux sous tension –
Vêtements conducteurs pour usage jusqu'à 800 kV
de tension nominale en courant alternatif et
±±600 kV en courant continu
Live working –
Conductive clothing for use at nominal voltage
up to 800 kV a.c. and ±±±±600 kV d.c.
 IEC 2002 Droits de reproduction réservés  Copyright - all rights reserved

Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any

utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including

électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from

microfilms, sans l'accord écrit de l'éditeur. the publisher.

International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland

Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch

CODE PRIX
Commission Electrotechnique Internationale PRICE CODE
International Electrotechnical Commission
Международная Электротехническая Комиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
---------------------- Page: 2 ----------------------
60895  IEC:2002 – 3 –
CONTENTS

FOREWORD .......................................................................................................................... 9

INTRODUCTION ...................................................................................................................13

1 Scope .............................................................................................................................15

2 Normative references......................................................................................................15

3 Terms and definitions .....................................................................................................17

4 Technical requirements...................................................................................................19

4.1 General .................................................................................................................19

4.2 Technical requirements for conductive material .....................................................19

4.2.1 Flame retardancy.......................................................................................19

4.2.2 Electrical resistance...................................................................................19

4.2.3 Current-carrying capability .........................................................................21

4.2.4 Shielding and screening efficiencies ..........................................................21

4.2.5 Requirements to withstand cleaning...........................................................21

4.2.6 Spark-discharge protection ........................................................................21

4.3 Specific requirements for component parts ............................................................21

4.3.1 Conductive gloves, overshoe socks and socks...........................................21

4.3.2 Conductive footwear ..................................................................................21

4.3.3 Conductive head cover and face screen.....................................................21

4.4 Marking .................................................................................................................23

4.5 Packaging..............................................................................................................23

4.6 Manufacturer’s instructions ....................................................................................23

5 Type tests of conductive material (specimen)..................................................................23

5.1 Flame-retardancy test............................................................................................23

5.1.1 Principle of test..........................................................................................23

5.1.2 Test apparatus...........................................................................................23

5.1.3 Test specimens..........................................................................................25

5.1.4 Test procedure...........................................................................................27

5.1.5 Results ......................................................................................................29

5.2 Electrical resistance test........................................................................................29

5.2.1 Test equipment ..........................................................................................29

5.2.2 Preparation of test specimens....................................................................31

5.2.3 Procedure..................................................................................................31

5.2.4 Test results................................................................................................31

5.3 Current-carrying capability.....................................................................................33

5.3.1 Test equipment ..........................................................................................33

5.3.2 Preparation of test specimens....................................................................33

5.3.3 Procedure..................................................................................................33

5.3.4 Test results................................................................................................33

5.4 Shielding efficiency................................................................................................33

5.4.1 Test equipment ..........................................................................................33

5.4.2 Test mounting............................................................................................33

5.4.3 Earth connection........................................................................................35

5.4.4 Line connection .........................................................................................35

5.4.5 Test procedure...........................................................................................35

---------------------- Page: 3 ----------------------
60895  IEC:2002 – 5 –

5.5 Resistance to cleaning...........................................................................................35

5.5.1 Laundering.................................................................................................35

5.5.2 Dry-cleaning ..............................................................................................37

5.5.3 Acceptability of material.............................................................................39

6 Type tests of garment .....................................................................................................39

6.1 General .................................................................................................................39

6.2 Electrical resistance ..............................................................................................39

6.2.1 Test procedure...........................................................................................39

6.2.2 Measurement locations ..............................................................................41

6.2.3 Acceptable values......................................................................................41

7 Type tests of the complete clothing.................................................................................41

7.1 Bonding test ..........................................................................................................41

7.2 Efficiency of conductive clothing ............................................................................41

8 Type test of the component parts....................................................................................43

8.1 Conductive gloves and mitts ..................................................................................43

8.2 Conductive overshoe socks and normal socks .......................................................43

8.3 Conductive footwear ..............................................................................................43

8.4 Conductive head cover and face screen ................................................................45

9 Routine tests ..................................................................................................................45

9.1 Parts of conductive clothing from a single manufacturer ........................................45

9.2 Parts of conductive clothing from multiple manufacturers.......................................45

10 Acceptance checks and tests..........................................................................................45

11 Modification ....................................................................................................................47

Annex A (normative) Suitable for live working (double triangle) (IEC-60417-5216) ...............63

Annex B (normative) Classification of tests ..........................................................................65

B.1 Tests on conductive material .................................................................................65

B.2 Tests on the conductive garment ...........................................................................65

B.3 Tests on the conductive component parts ..............................................................65

B.4 Tests on the complete clothing ..............................................................................67

Annex C (normative) Sampling procedure ............................................................................69

C.1 General .................................................................................................................69

C.2 Classification of defects.........................................................................................69

C.3 General sampling plan...........................................................................................69

C.4 Procedure when testing is carried out in a laboratory

other than the manufacturer’s ................................................................................69

Annex D (informative) Electrodes for determining electrical resistance properties

of material specimen and garments.......................................................................................71

D.1 General .................................................................................................................71

D.2 Conductive paint....................................................................................................71

Annex E (informative) Recommendations for the in-service care, maintenance and

periodic testing of conductive clothing and component parts .................................................73

E.1 Care, storage and repair........................................................................................73

E.2 Inspection before use ............................................................................................75

E.3 Non-destructive periodic testing.............................................................................75

Bibliography..........................................................................................................................79

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60895  IEC:2002 – 7 –
Figure 1 – Example of general arrangement of complete conductive clothing

(see clause 3) .......................................................................................................................47

Figure 2 – Flame-retardancy test – Test chamber (see 5.1)...................................................49

Figure 3 – Flame-retardancy test – Specimen holder and support (see 5.1) ..........................51

Figure 4 – Electrical resistance test – Test set-up (see 5.2.3) ...............................................53

Figure 5 – Orientation of test specimens for electrical resistance

and current-carrying capability tests (see 5.2.2) ....................................................................53

Figure 6 – Electrical resistance test – Electrical circuit (see 5.2.3) ........................................53

Figure 7 – Shielding efficiency (see 5.4)................................................................................55

Figure 8 – Efficiency of conductive clothing (see 7.2)............................................................57

Figure 9 – Electrical resistance test – Conductive gloves and mitts (see 8.1) ........................59

Figure 10 – Electrical resistance test – Conductive overshoe socks

and normal socks (see 8.2) ...................................................................................................59

Figure 11 – Electrical resistance test – Conductive footwear (see 8.3) ..................................61

Table B.1 – List of tests to be carried out on the conductive material ....................................65

Table B.2 – List of tests to be carried out on the conductive garment ....................................65

Table B.3 – List of tests to be carried out on the component parts.........................................67

Table B.4 – List of tests to be carried out on the complete clothing .......................................67

Table C.1 – Sampling plan (AQL 10) .....................................................................................69

---------------------- Page: 5 ----------------------
60895  IEC:2002 – 9 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LIVE WORKING –
CONDUCTIVE CLOTHING FOR USE AT NOMINAL VOLTAGE
UP TO 800 kV AC AND ±600 kV DC
FOREWORD

1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.

3) The documents produced have the form of recommendations for international use and are published in the form

of standards, technical specifications, technical reports or guides and they are accepted by the National

Committees in that sense.

4) In order to promote international unification, IEC National Committees undertake to apply IEC International

Standards transparently to the maximum extent possible in their national and regional standards. Any

divergence between the IEC Standard and the corresponding national or regional standard shall be clearly

indicated in the latter.

5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any

equipment declared to be in conformity with one of its standards.

6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject

of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 60895 has been prepared by IEC technical committee 78: Live

working.

This second edition cancels and replaces the first edition, published in 1987 and constitutes a

technical revision of several sections:

– the scope has been extended to cover the use of conductive clothing to ±600 kV d.c.;

– revision of the electrical resistance requirements of the fabrics used in conductive

clothing;
– revision of the testing procedures for complete clothing.
The text of this standard is based on the following documents:
FDIS Report on voting
78/469/FDIS 78/478/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.

---------------------- Page: 6 ----------------------
60895  IEC:2002 – 11 –

The committee has decided that the contents of this publication will remain unchanged

until 2007. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.

The contents of the corrigendum of February 2003 have been included in this copy.

---------------------- Page: 7 ----------------------
60895  IEC:2002 – 13 –
INTRODUCTION

This International Standard provides specifications for protective conductive clothing currently

being used without incident in live work by qualified electrical workers throughout the world.

The adequacy of this clothing is established by its screening efficiency and the electrical

resistance of material and component parts of the conductive clothing. Based on resistance

measurements carried out by manufacturers and utilities of used clothing being successfully

worn in the field, differences of up to 1 000 fold have been reported.

Verification tests have shown that the clothing is equally effective against the electric field

existing in the vicinity of installations up to 800 kV a.c. and ±600 kV d.c.

This standard has been prepared according to the requirements of IEC 61477, where

applicable.
---------------------- Page: 8 ----------------------
60895  IEC:2002 – 15 –
LIVE WORKING –
CONDUCTIVE CLOTHING FOR USE AT NOMINAL VOLTAGE
UP TO 800 kV AC AND ±600 kV DC
1 Scope

This International Standard is applicable to conductive clothing, either assembled from

component parts or forming a single complete clothing, worn by (electrically) skilled persons

during live working (especially bare-hand working) at a nominal power system voltage up to

800 kV a.c. and ±600 kV d.c.

It is applicable to conductive jackets, trousers, coveralls (one-piece clothing), gloves or mitts,

hoods, shoes, overshoe socks and socks.
2 Normative references

The following referenced documents are indispensable for the application 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 60050-151:2001, International Electrotechnical Vocabulary (IEV) – Part 151: Electrical and

magnetic devices

IEC 60050-651:1999, International Electrotechnical Vocabulary (IEV) – Part 651: Live working

IEC 60050-826:1982, International Electrotechnical Vocabulary (IEV) – Chapter 826: Elect-

rical installations of buildings

IEC 60212:1971, Standard conditions for use prior to and during the testing of solid electrical

insulating materials
IEC 60417 (all parts), Graphical symbols for use on equipment

IEC 60456:1998, Clothes washing machines for household use – Methods for measuring the

performance
IEC 60743:2001, Live working – Terminology for tools, equipment and devices
IEC 61318/TR2:1994, Live working – Guidelines for quality assurance plans

IEC 61477:2001, Live working – Minimum requirements for the utilization of tools, devices and

equipment

ISO 2859-1:1999, Sampling procedures for inspection by attributes – Part 1: Sampling

schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
ISO 3175:(all parts), Textiles – Professional textile cleaning and finishing
ISO 3290:2001, Rolling bearings – Balls – Dimensions and tolerances
---------------------- Page: 9 ----------------------
60895  IEC:2002 – 17 –

ISO 6330:2000, Textiles – Domestic washing and drying procedures for textile testing

ISO 9000:2000, Quality management systems – Fundamentals and vocabulary
ISO 9001:2000, Quality management systems – Requirements

ISO 9004:2000, Quality management systems – Guidelines for performance improvements

3 Terms and definitions

For the purposes of this International Standard, the following definitions apply.

NOTE Further information on terminology is illustrated in figure 1.
3.1
conductive clothing

clothing made of natural or synthetic material with integral interwoven conductive fibres, or

layers, used to provide electrical continuity between all parts of the clothing and a reduction of

electric field
[IEC 60743, definition 8.2.7, modified]
3.2
conductive material

material composed of metallic threads or non-metallic conductive substances and natural or

synthetic threads closely woven, knitted, or layered
3.3
equipotential bonding lead (bonding lead)

flexible metallic connection used by the worker to connect or disconnect his or her conductive

clothing, bucket or screen, to or from another conductive part to create equipotential bonding

NOTE 1 This lead is not an earthing device.

NOTE 2 The means of securing or connecting the lead shall be such that under emergency conditions, for

example, a fall, the lead can separate.
[IEV 651-07-07, modified]
3.4
head cover (hood)

part of the clothing, either as a separate item or integrated into a complete garment, that

covers the head
3.5
face screen for electrical works
protective device made of conductive, solid, or meshed material

NOTE It provides electrical continuity with the conductive clothing of the worker and a reduction of electric field to

the face, or part thereof
[IEC 60743, definition 8.4.3]
3.6
conductive overshoe sock
sock made of conductive material and worn over shoe/boot
3.7
garment
main body of the clothing consisting of jacket and trousers
---------------------- Page: 10 ----------------------
60895  IEC:2002 – 19 –
3.8
component parts

additional elements of the complete clothing such as gloves, socks, head protection, and

footwear worn in addition to the main garment and bounded to it
3.9
shielding efficiency

base log 10 of the ratio of a voltage without the conductive clothing to the voltage measured

at the spot with conductive clothing
3.10
screening efficiency

per cent ratio of the total current injected into the conductive clothing to the current flowing in

the body
3.11
equipotential bonding

electrical connection putting various exposed conductive parts and extraneous conductive

parts at a substantially equal potential
[IEV 826-04-09]
4 Technical requirements
4.1 General

The conductive clothing shall constitute an electrically continuous assembly for the worker.

If press studs, zip fasteners, hooks and eyes or any other method of fastening are used in the

assembly of the complete clothing, care should be taken to ensure that the electrical

conductivity of the clothing is not impaired.

Bonding lead shall be capable of withstanding anticipated electrical and mechanical stresses.

4.2 Technical requirements for conductive material

The material used to manufacture the conductive clothing shall have the following properties.

NOTE The material used to manufacture the conductive clothing should be resistant to abrasion and to tearing.

4.2.1 Flame retardancy

The material used in conductive clothing shall not ignite and continue to burn when exposed

to an ignition source.
4.2.2 Electrical resistance

This quality can be considered as a basic element which determines the current-carrying

capability and the spark-discharge properties of the material.

The only direct consequence for a worker of the correct value of electrical resistance is the

low potential difference between two points of the cloth in contact with the skin, which is thus

an element of comfort.
---------------------- Page: 11 ----------------------
60895  IEC:2002 – 21 –
4.2.3 Current-carrying capability

During the worker's travel to his working position (from the metallic structure of the tower or

from the ground in an aerial device) and at the moment of his connection to the live

conductor, capacitive currents flow through his clothing. It is necessary for the clothing to be

able to conduct them. There shall be no damage to the material.
4.2.4 Shielding and screening efficiencies

The material used for the conductive clothing or the component parts shall attenuate the

electric field. The attenuation of the material is determined by shielding efficiency, and that of

the conductive clothing by screening efficiency. Shielding and screening efficiencies are

defined in 3.9 and 3.10.
These efficiencies shall meet the requirements of this standard.
4.2.5 Requirements to withstand cleaning

To ensure that the efficiency and flame-retardant properties of the conductive clothing do not

deteriorate excessively after repeated cleaning, the material shall be subjected to 10 wash-

dry cycles in accordance with ISO 6330 and/or 10 dry-cleaning cycles in accordance with

ISO 3175. After completion of the 10 washing/cleaning cycles, the shielding efficiency and

flame-retardant properties of the material shall still meet the specified requirements.

4.2.6 Spark-discharge protection

To provide protection to the worker from direct spark discharges, the spacing between any

individual adjacent conducting components in the conductive material (except for the face

screen) shall not exceed 5 mm under all normal wearing conditions including stretching (such

as at the elbows or knees).
4.3 Specific requirements for component parts
4.3.1 Conductive gloves, overshoe socks and socks

The maximum resistance value of gloves and overshoe socks or socks, when measured using

the specified electrodes, is determined by the manufacturer to meet the bonding requirements

of 7.1.
4.3.2 Conductive footwear

The maximum resistance value, when measured using the specified electrodes, is determined

by the manufacturer to meet the bonding requirements of 7.1.
4.3.3 Conductive head cover and face screen

A conductive head cover is necessary to provide the worker with a full screening effect.

Further screening protection can be provided by a conductive screen for the face.

If no face screen is provided, protective flaps, conductive visor and the shape of the hood

shall ensure face protection. Provision shall be made for an effective and efficient electrical

bond between any head cover, screen or face screen and the total garment.
The resistance of the bond shall be checked and meet the requirements of 7.1.
---------------------- Page: 12 ----------------------
60895  IEC:2002 – 23 –
4.4 Marking

Each conductive item shall carry, as a minimum, the following permanent markings:

– name or trade mark of the manufacturer;
– type reference and size (in accordance with ISO standards);
– year of manufacture;

– symbol IEC-60417-5216 – suitable for live working; double triangle (see annex A),

attached by sewing, adhesion or other suitable means;

– number of the relevant IEC standard immediately adjacent to the symbol with year of

publication (four digits) (IEC 60895:2002).

Markings shall be clearly visible and legible to a person with normal or corrected vision

without additional magnification.
4.5 Packaging

The conductive material may become oxidized when stored in the ambient air conditions. The

manufactured clothing shall be packaged for shipment in such a way that oxidation is

retarded. If the parts of clothing are to be issued by the user separately, individual packaging

of parts should be requested by the user. For example, the conductive clothing may be

packaged inside an airtight plastic bag with tissue paper protecting the conductive clothing

from contact with the plastic bag.
4.6 Manufacturer’s instructions

Each piece of the conductive clothing shall come with the manufacturer’s instructions for use

and care. These instructions shall include, as a minimum, recommendations for cleaning,

storage and periodic testing.
5 Type tests of conductive material (specimen)

These tests shall apply to specimens of the material used in the manufacturing of conductive

clothing.
5.1 Flame-retardancy test
5.1.1 Principle of test

Ignition of a rectangular test specimen, vertically hung, by a standard ignition source

according to prescribed conditions constitutes the principle of the test, which includes the

measurement of the burned area and classification of the tested material according to

the results.
5.1.2 Test apparatus
The test equipment shall consist of
– a test chamber,
– a specimen holder,
– accessories.
---------------------- Page: 13 ----------------------
60895  IEC:2002 – 25 –
5.1.2.1 Test chamber

The test chamber (see figure 2) shall be made of steel plate not less than 1,5 mm thick.

The interior walls of the chamber shall be painted matt black.
The chamber shall be composed of
a) a steel box 570 m
...

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