ISO/DIS 16653-2

Mobile elevating work platforms -- Design, calculations, safety requirements and test methods relative to special features

Plates-formes élévatrices mobiles de personnel -- Conception, calculs, exigences de sécurité et méthodes d'essai concernant les caractéristiques spéciales

Standards Content (sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 16653-2
ISO/TC 214 Secretariat: ANSI
Voting begins on: Voting terminates on:
2020-10-30 2021-01-22
Mobile elevating work platforms — Design, calculations,
safety requirements and test methods relative to special
features —
Part 2:
MEWPs with non-conductive (insulating) components

Plates-formes élévatrices mobiles de personnel — Conception, calculs, exigences de sécurité et méthodes

d'essai concernant les caractéristiques spéciales —
Partie 2: PEMP avec composants non conducteurs (isolants)
ICS: 53.020.99
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
This document is circulated as received from the committee secretariat.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 16653-2:2020(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2020
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ISO/DIS 16653-2:2020(E)
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© ISO 2020

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ii © ISO 2020 – All rights reserved
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ISO/DIS 16653-2:2020(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ..............................................................................................................................................................................................................................vii

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Safety requirements and/or protective/risk reduction measures .................................................................. 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Structural requirements ................................................................................................................................................................. 3

4.3 Hydraulic liquid ...................................................................................................................................................................................... 3

4.4 Non-conductive hydraulic and pneumatic hoses ...................................................................................................... 3

4.5 Work platforms ....................................................................................................................................................................................... 3

4.5.1 Work platform materials ........................................................................................................................................... 3

4.5.2 Work platforms designed for use without an insulating liner ................................................. 3

4.5.3 Work platforms designed for use with an insulating liner .......................................................... 3

4.5.4 Non-conductive (insulating) work platforms ......................................................................................... 3

4.6 Electrical requirements ................................................................................................................................................................... 3

4.6.1 Non-conductive (insulating) components ................................................................................................. 3

4.6.2 Hydraulic and pneumatic hose ............................................................................................................................ 3

4.6.3 Lower test electrode system for MEWPs with non-conductive (insulating)

components .......................................................................................................................................................................... 3

4.6.4 Chassis insulating system......................................................................................................................................... 4

5 Verification of the safety requirements and/or protective/risk reduction measures ................4

5.1 Examinations and tests .................................................................................................................................................................... 4

5.1.1 General...................................................................................................................................................................................... 4

5.2 Design check ............................................................................................................................................................................................. 4

5.3 Manufacturing check ......................................................................................................................................................................... 5

5.4 Tests .................................................................................................................................................................................................................. 5

5.4.1 Type tests ............................................................................................................................................................................... 5

5.4.2 Dielectric tests ................................................................................................................................................................... 5

5.4.3 Test criteria for MEWPs with a chassis insulating system ........................................................... 6

5.5 Electrical tests ......................................................................................................................................................................................... 6

5.5.1 Test criteria for MEWPs with non-conductive (insulating) boom including

lower test electrode system ................................................................................................................................... 6

5.5.2 Test criteria for MEWPs having non-conductive (insulating) components

without lower test electrode system .............................................................................................................. 7

5.5.3 Test criteria for aerial ladder and vertical tower MEWPs with non-

conductive (insulating) components (sections) ................................................................................11

5.5.4 Test criteria for chassis insulating systems ...........................................................................................11

5.5.5 Test criteria for insulating platform liners .............................................................................................12

5.5.6 Verification of tests in Section 5.5 ..................................................................................................................13

5.6 Initial inspection and test ...........................................................................................................................................................13

6 Information for use .........................................................................................................................................................................................13

6.1 General ........................................................................................................................................................................................................13

6.2 Operator's manual ............................................................................................................................................................................13

6.3 Markings ....................................................................................................................................................................................................13

6.3.1 General...................................................................................................................................................................................13

6.3.2 Manufacturer's plate .................................................................................................................................................13

6.3.3 Work platform .................................................................................................................................................................13

7 Safety principles, inspection, maintenance, and operation .................................................................................14

7.1 General ........................................................................................................................................................................................................14

7.2 Maintenance ...........................................................................................................................................................................................14

7.2.1 Pre-start inspection ....................................................................................................................................................14

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ISO/DIS 16653-2:2020(E)

7.2.2 Annual mechanical inspection/testing ......................................................................................................14

7.2.3 Annual confirmation electrical test ..............................................................................................................15

7.2.4 Electrical tests .................................................................................................................................................................16

7.2.5 Electrical test equipment .......................................................................................................................................18

7.2.6 Electrical certification ..............................................................................................................................................18

7.3 Modifications or alterations .....................................................................................................................................................18

Annex A (normative) List of hazards .................................................................................................................................................................19

Annex B (informative) Sample of manufacturer's plate information ..............................................................................20

Bibliography .............................................................................................................................................................................................................................21

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ISO/DIS 16653-2:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 214, Elevating work platforms.

This second edition cancels and replaces the first edition (ISO 16653-2:2008), which has been

technically revised.
The main changes compared to the previous edition are as follows:
— Introduction
• Editorial changes
— Clause 1
• Clarified in scope the limitation of applicability to 46 kV and below.
— Clause 2
• Updated references
— Clause 3
• Updated format and added boiler-plate language.
— Clause 4
• Moved Hazard List to Annex and updated clause numbering.
• Aligned bursting safety factors with ISO 16368.
• Removed requirements for vacuum flashover.
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ISO/DIS 16653-2:2020(E)
• Clarified and reorganized work platform requirements
— Clause 5
• Added examination and test general requirements.
• Updated Table 2 and Table 3. Added notes.
• Added and updated Figures.
A list of all parts in the ISO 16653 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
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ISO/DIS 16653-2:2020(E)
Introduction

The object of this document is to define rules for safeguarding persons and objects against the risk of

accident associated with the operation of special-application mobile elevating work platforms (MEWPs).

The requirements of this document are intended to supplement or modify those of ISO 16368. Unless

specified otherwise within this document, all the relevant provisions of ISO 16368 are applicable in

addition to the provisions of this document.

This document does not repeat all the general technical rules applicable to every electrical, mechanical

or structural component.

The safety requirements of this document have been drawn up on the basis that MEWPs are periodically

maintained according to the manufacturer's instructions, working conditions, frequency of use and

applicable regulations.

It is assumed that MEWPs will be checked for proper function daily before start of work and that the

MEWP will not be put into operation unless all required controls and safety devices are available and in

working order. If a MEWP is seldom used, the checks may be made before start of work.

Where, for clarity, an example of a safety measure is given in the text, the example is intended as a

possible solution. Any other safety measure solution leading to an equivalent level of safety is

permissible.
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DRAFT INTERNATIONAL STANDARD ISO/DIS 16653-2:2020(E)
Mobile elevating work platforms — Design, calculations,
safety requirements and test methods relative to special
features —
Part 2:
MEWPs with non-conductive (insulating) components
1 Scope

This document specifies the design, calculations, safety requirements and test methods for mobile

elevating work platforms (MEWPs) with non-conductive (insulating) components. It is intended to be

used in conjunction with ISO 16368.

It is applicable to all types and sizes of MEWPs with non-conductive (insulating) components, including

dielectric components designed and tested to meet the specific electrical properties consistent with the

manufacturer's identification plate. This equipment is intended to move persons, tools and equipment to

working positions where they can carry out work from a work platform located above a non-conductive

(insulating) boom section.

This document covers structural design calculations and the application of stability criteria,

construction, safety examinations and tests done before MEWPs with non-conductive (insulating)

components are first put into service. It identifies, in Annex A, the hazards arising from the use of

MEWPs with non-conductive (insulating) components and describes methods for the elimination or

reduction of these hazards.

MEWPs covered in this document are not intended to have any of their components make contact with

live parts of electrical installations. The electrical properties of a MEWP's non-conducting (insulating)

components can provide electrical protection in case of inadvertent contact above the non-conductive

boom component at the platform end. If a MEWP is equipped with a chassis insulating system, it can

provide electrical protection for ground personnel in case of inadvertent contact above that system.

This document is not applicable to MEWPs designed for or capable of live working (see IEC 61057). The

electrical insulation level is limited to voltages experienced in electrical distribution systems 46 kV

and below.
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.

ISO 12100, Safety of machinery — General principles for design — Risk assessment and risk reduction

ISO 16368, Mobile elevating work platforms — Design, calculations, safety requirements and test methods

ISO 18893, Mobile elevating work platforms — Safety principles, inspection, maintenance and operation

IEC 61057, Live working — Insulating aerial devices for mounting on a chassis
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ISO/DIS 16653-2:2020(E)
3 Terms and definitions

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/

For the purposes of this document, the terms and definitions in ISO 12100, ISO 18893, ISO 16368 and

the following apply.
3.1
chassis insulating system

system of non-conductive (insulating) components installed between the chassis and the structure

supporting the upper non-conductive (insulating) boom

Note 1 to entry: to entry Such a system, when properly maintained, can provide insulation of the chassis should

the portion of the MEWP between the upper non-conductive (insulating) boom and this system inadvertently

contact an energized conductor or other apparatus.
3.2
electrical insulation level

level of phase-to-earth (ground) electrical insulation offered by the non-conductive (insulating)

components of the upper boom and expressed by the maximum nominal voltage of an electrical

installation (line or equipment) in case of inadvertent contact with this installation above the non-

conductive (insulating) components at the platform end of the MEWP

Note 1 to entry: to entry The electrical insulation level is established by the MEWP's responsible entity.

Note 2 to entry: to entry The electrical insulation level is limited to voltages experienced in electrical distribution

systems (46 kV and below).
3.3
insulating liner

insert made of non-conductive (insulating) material and designed to fit inside the work platform

3.4
non-destructive testing

examination by various means of devices or their components without alteration of the original

components, so that they may function as before the testing

Note 1 to entry: to entry These include acoustic emissions (AE), magnetic particle (MT), liquid penetrant (PT),

ultrasonic (UT), radiography (RT), dielectric (DT), and visual (VT).
4 Safety requirements and/or protective/risk reduction measures
4.1 General

4.1.1 Machinery shall comply with the safety requirements and/or protective/risk reduction measures

of this clause.

4.1.2 In addition, the machine shall be designed according to the principles of ISO 12100:2010 for

relevant but not significant hazards which are not dealt with by this document.

4.1.3 Except where otherwise specified in this document, the machine shall be in accordance with

ISO 16368.
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ISO/DIS 16653-2:2020(E)
4.2 Structural requirements
Structural requirements shall be in accordance with ISO 16368.
4.3 Hydraulic liquid

Hydraulic liquid (usually oil or similar fluid) shall meet the requirements of the responsible entity and

the insulating requirements of the MEWP.
4.4 Non-conductive hydraulic and pneumatic hoses

Non-conductive hydraulic hoses and pneumatic hoses shall meet the requirements of IEC 61057.

4.5 Work platforms
4.5.1 Work platform materials

The work platform shall be constructed of non-conductive materials that will not sustain a flame after

an ignition source has been removed.
NOTE UL 94 – H-B or IEC 60695-11-10 can be used for guidance.
4.5.2 Work platforms designed for use without an insulating liner

A work platform designed for use without an insulating liner shall meet the requirements of

ISO 16368:202X, 4.6.16.
4.5.3 Work platforms designed for use with an insulating liner

A work platform designed for use with an insulating liner shall be identified as non-insulating. The

insulating liner shall be constructed from non-conductive materials and tested in accordance with

IEC 61057. The insulating liner shall be supported by the inside bottom surface of the work platform. A

work platform designed for use with an insulating liner shall not have drain holes or access openings.

4.5.4 Non-conductive (insulating) work platforms

A non-conductive (insulating) platform shall have no drain holes or access openings and shall be tested

in accordance with the dielectric tests for insulating liners as defined in IEC 61057.

4.6 Electrical requirements
4.6.1 Non-conductive (insulating) components

All components crossing non-conductive (insulating) portions of the applicable MEWP shall have

appropriate electrical insulating properties in order that it complies with the test requirements of this

document. All non-conductive (insulating) systems shall maintain the electrical insulating values in all

working boom positions, as defined by the responsible entity.
4.6.2 Hydraulic and pneumatic hose

All hydraulic and pneumatic hoses crossing the non-conductive (insulating) portion of the upper boom

shall be tested in accordance with IEC 61057.

4.6.3 Lower test electrode system for MEWPs with non-conductive (insulating) components

MEWPs with non-conductive (insulating) components equipped with a lower test electrode system

shall meet the lower test electrode system requirements of IEC 61057.
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ISO/DIS 16653-2:2020(E)
4.6.4 Chassis insulating system

MEWPs with a chassis insulating system shall have a means provided to bypass the chassis insulating

system during dielectric tests. See Figure 1.
Key
1 insulating system
2 temporary shunt (to be removed after test)
3 stainless steel stud with 25 mm thread exposed
Figure 1 — Example of shunting arrangement for chassis insulating systems
5 Verification of the safety requirements and/or protective/risk reduction
measures
5.1 Examinations and tests
5.1.1 General

5.1.1.1 The MEWP shall comply with the safety requirements and/or protective measures of ISO 16368

and this document.

5.1.1.2 Examinations and tests to ensure that the MEWP complies with this document shall consist of:

a) design checks (see 5.2),
b) manufacturing checks (see 5.3), and
c) tests (see 5.4).
5.1.1.3 The results of examinations and tests shall be recorded.
5.2 Design check

The design check shall verify that the MEWP is designed in accordance with this document. It shall

include verification of the following:
a) drawings containing the main dimensions of the MEWP;
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ISO/DIS 16653-2:2020(E)
b) description of the MEWP, with necessary information about its capabilities;
c) information about the materials used;
d) diagrams of the electrical, hydraulic and pneumatic circuits;
e) the operator's manual;
f) calculations.
5.3 Manufacturing check
The manufacturing check shall verify that:
a) the MEWP is manufactured in accordance with the design check documents,
b) the components are in accordance with the drawings,

c) test certificates are available for each type of rope, chain and hydraulic or pneumatic hose, and that

these certificates indicate the minimum breaking force or bursting pressure, as appropriate,

d) the quality of welds is ensured by use of the appropriate standard(s), and

e) the construction and installation of parts, components and systems are in accordance with this

document.
5.4 Tests
5.4.1 Type tests

Each MEWP with non-conductive (insulating) components shall be type-tested in accordance with

ISO 16368:202X, 5.2. This identifies the test to be performed in lieu of ISO 16368:202X, 5.1.3 a) and

5.1.3 b).
5.4.2 Dielectric tests
5.4.2.1 Test criteria for MEWPs with a non-conductive (insulating) boom

5.4.2.1.1 Each MEWP with non-conductive (insulating) upper boom shall undergo one of the tests

described in Table 2 to verify the insulating performance of the components of the non-conductive

(insulating) boom assembly. This test may be conducted before or after installation on a chassis.

5.4.2.1.2 When a MEWP is modified or altered after the dielectric test prior to mounting, the test shall

be performed again following the modification or alteration.

NOTE Modifications or alterations can include the addition of other devices (for example, another platform,

a jib, a winch auxiliary devices).

5.4.2.1.3 The installer shall acquire written approval from the responsible entity for modifications or

alterations to verify that design testing requirements have been met.
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ISO/DIS 16653-2:2020(E)
Table 2 — Dielectric test values for MEWPs with non-conductive (insulating) boom
Test for MEWPs with lower test electrode system

Required 50 Hz to 60 Hz test voltage (rms kV) for 1 min Maximum allowable current

a b

Line-to-earth (ground) voltage of nominal line voltage X 2 1 µA per kilovolt of test voltage

Test for MEWPs without lower test electrode system

Required 50 Hz to 60 Hz test voltage (rms kV) for 3 min Maximum allowable current

a b

Line-to-earth (ground) voltage of nominal line voltage X 2 10 µA per kilovolt of test voltage

Earth (ground) to line voltage is equal to the rated voltage divided by the square root of 3.

Nominal line voltage (rms kV) reflects the responsible entity's rated electrical insulation level and shall be not more

than 46 kV.
5.4.3 Test criteria for MEWPs with a chassis insulating system

5.4.3.1 Each MEWP equipped with a chassis insulating system shall undergo a dielectric test to verify

the non-conductivity or insulating quality of the non-conductive (insulatin
...