Luminaires - Part 2-20: Particular requirements - Lighting chains

IEC 60598-2-20:2022 is available as IEC 60598-2-20:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60598-2-20:2022 specifies requirements for lighting chains fitted with series, parallel or a combination of series/parallel connected light sources for use either indoors or outdoors on supply voltages not exceeding 250 V. This fifth edition cancels and replaces the fourth edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- specific provisions for temporarily installed protected lighting (TPL) chains have been added;
- new terms and definitions have been added.

Luminaires - Partie 2-20: Exigences particulières - Guirlandes lumineuses

IEC 60598-2-20:2022 est disponible sous forme de IEC 60598-2-20:2022 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 60598-2-20:2022 spécifie les exigences applicables aux guirlandes lumineuses équipées de sources lumineuses montées en série, en parallèle ou en combinaison série/parallèle pour utilisation à l'intérieur ou à l'extérieur, pour des tensions d'alimentation qui ne dépassent pas 250 V. Cette cinquième édition annule et remplace la quatrième édition parue en 2014. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- des dispositions spécifiques aux guirlandes lumineuses protégées installées temporairement (TPL) ont été ajoutées;
- de nouveaux termes et définitions ont été ajoutés.

General Information

Status
Published
Publication Date
30-Jan-2022
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
31-Jan-2022
Ref Project

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IEC 60598-2-20
Edition 5.0 2022-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Luminaires –
Part 2-20: Particular requirements – Lighting chains
Luminaires –
Partie 2-20: Exigences particulières – Guirlandes lumineuses
IEC 60598-2-20:2022-01(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60598-2-20
Edition 5.0 2022-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Luminaires –
Part 2-20: Particular requirements – Lighting chains
Luminaires –
Partie 2-20: Exigences particulières – Guirlandes lumineuses
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.40 ISBN 978-2-8322-1071-3

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 60598-2-20:2022 © IEC 2022
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

20.1 Scope .......................................................................................................................... 7

20.2 Normative references .................................................................................................. 7

20.3 Terms and definitions .................................................................................................. 8

20.4 General test requirements ......................................................................................... 10

20.5 Classification of luminaires ........................................................................................ 10

20.5.1 General ............................................................................................................ 10

20.5.2 Protection against electric shock ...................................................................... 10

20.5.3 Protection against dust, solid objects and moisture .......................................... 10

20.6 Marking ..................................................................................................................... 10

20.6.1 General ............................................................................................................ 10

20.6.2 Lighting chain marking ..................................................................................... 11

20.6.3 Lighting chain and packaging marking .............................................................. 11

20.6.4 Packaging or instructions marking .................................................................... 11

20.7 Construction .............................................................................................................. 12

20.7.1 General ............................................................................................................ 12

20.7.2 Lampholders .................................................................................................... 12

20.7.3 Terminal blocks ................................................................................................ 12

20.7.4 Terminals and supply connections .................................................................... 13

20.7.5 Gaskets ............................................................................................................ 13

20.7.6 Mechanical strength ......................................................................................... 13

20.7.7 Lamp bridging devices ...................................................................................... 13

20.7.8 Control units and controlgear ........................................................................... 13

20.7.9 Lamp rotation ................................................................................................... 14

20.7.10 Lamp insertion and withdrawal force ................................................................. 14

20.7.11 Lamp mechanical requirements ........................................................................ 14

20.7.12 Temporarily installed protected lighting (TPL) chains ........................................ 14

20.8 Creepage distances and clearances .......................................................................... 15

20.9 Provisions for earthing ............................................................................................... 15

20.10 Terminals .................................................................................................................. 15

20.11 External and internal wiring ....................................................................................... 15

20.11.1 General ............................................................................................................ 15

20.11.2 Cables for lighting chains ................................................................................. 15

20.11.3 Cord anchorage test ......................................................................................... 16

20.11.4 Plugs and cable length ..................................................................................... 16

20.11.5 Maximum length of extendable class II lighting chains ...................................... 16

20.12 Protection against electric shock ............................................................................... 17

20.12.1 General ............................................................................................................ 17

20.12.2 Divisible plug .................................................................................................... 17

20.12.3 Electrification of decorations ............................................................................ 17

20.12.4 Contacts of push-in lampholders ...................................................................... 18

20.12.5 Blanking plugs .................................................................................................. 18

20.13 Endurance tests and thermal tests ............................................................................. 19

20.13.1 General ............................................................................................................ 19

---------------------- Page: 4 ----------------------
IEC 60598-2-20:2022 © IEC 2022 – 3 –

20.13.2 Test voltage ..................................................................................................... 19

20.13.3 Lamp bridging devices ...................................................................................... 19

20.13.4 Short-circuit test of rectifier .............................................................................. 19

20.14 Resistance to dust, solid objects and moisture .......................................................... 19

20.15 Insulation resistance and electric strength ................................................................. 20

20.16 Resistance to heat, fire and tracking .......................................................................... 20

Annex A (normative) Requirements for interconnecting connectors for use in lighting

chains ................................................................................................................................... 21

Bibliography .......................................................................................................................... 23

Figure 1 – Examples of different types of lighting chains ....................................................... 10

Figure 2 – Example of a connector to a divisible plug for lighting chains ............................... 17

Figure 3 – Example of test device suitable for checking security of lampholder contacts ....... 18

Table 1 – Cable or cord types for lighting chains ................................................................... 15

Table 2 – Conductor size for lighting chains .......................................................................... 16

---------------------- Page: 5 ----------------------
– 4 – IEC 60598-2-20:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LUMINAIRES –
Part 2-20: Particular requirements – Lighting chains
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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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

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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

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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) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

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

IEC 60598-2-20 has been prepared by subcommittee 34D: Luminaires, of IEC technical

committee 34: Lighting. It is an International Standard.

This fifth edition cancels and replaces the fourth edition published in 2014. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:

a) specific provisions for temporarily installed protected lighting (TPL) chains have been

added;
b) new terms and definitions have been added.
---------------------- Page: 6 ----------------------
IEC 60598-2-20:2022 © IEC 2022 – 5 –
The text of this International Standard is based on the following documents:
Draft Report on voting
34D/1646/FDIS 34D/1651/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/standardsdev/publications.

This Part 2-20 is to be used in conjunction with the latest edition of IEC 60598-1 and its

amendment(s). It was established on the basis of the ninth edition (2020) of that standard.

NOTE 1 When "Part 1" is mentioned in this document, it refers to IEC 60598-1.
NOTE 2 In this document, the following print types are used:
– compliance statements: in italic type.

A list of all the parts in the IEC 60598 series, published under the general title Luminaires can

be found on the IEC website.

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,
• replaced by a revised edition, or
• amended.
---------------------- Page: 7 ----------------------
– 6 – IEC 60598-2-20:2022 © IEC 2022
INTRODUCTION
This new edition includes the following technical changes:

a) Inclusion of specific provisions for temporarily installed protected lighting (TPL) chains.

This form of lighting chain was not previously addressed with specific provisions in previous

editions of the standard. A temporarily installed protected lighting chain is a physical impact

protected rough service lighting chain intended for temporary installation on building sites

during the construction or demolition phases of a building project.
b) Addition of terms and definitions

New terms and definitions have been added to include the expanded typology for lighting chains

and to include a connector with breaking capacity (CBC).
c) Inclusion of graphical depictions of lighting chains

Graphical depictions have been added to clarify and differentiate the construction and

installation configurations of the various different types of lighting chains. Word descriptions

alone had limitations in clearly and precisely defining the characteristics of the numerous

variants in this luminaire sector.

The illustrations show the three main types of lighting chains: permanently installed lighting

chains, temporarily installed lighting chains and temporarily installed protected lighting (TPL)

chains, as well as further differentiating by installation and/or fixing method where applicable.

---------------------- Page: 8 ----------------------
IEC 60598-2-20:2022 © IEC 2022 – 7 –
LUMINAIRES –
Part 2-20: Particular requirements – Lighting chains
20.1 Scope

This part of IEC 60598 specifies requirements for lighting chains fitted with series, parallel or a

combination of series/parallel connected light sources for use either indoors or outdoors on

supply voltages not exceeding 250 V.

For combinations where rope lights (also known as sealed lighting chains) are included, see

IEC 60598-2-21.

Lighting chains provided with fixed or detachable attachments for example ornamental or

decorative, are considered to be covered by this document.

For lighting chains fitted with lampholders of the push-in type, the appropriate requirements of

this document applies.
This document covers the following lighting chains:
a) permanently installed lighting chains;
b) temporarily installed lighting chains;
c) temporarily installed protected lighting (TPL) chains.

NOTE 1 Festoon lighting chain – a lighting chain that is supported by the supply cable or fixed at the lampholder

and is permanently connected to the fixed wiring. Festoon lighting chains are primarily suitable for permanent indoor

or outdoor lighting applications.

NOTE 2 Decorative lighting chain – a lighting chain that is supported by the supply cable and is temporarily

connected to the fixed wiring. Decorative lighting chains are primarily suitable for domestic, indoor or indoor/outdoor

temporary lighting applications, see Figure 1 for examples.

NOTE 3 Temporarily installed protected lighting (TPL) chain – a lighting chain where each lampholder is fixed to

the building or structure and the light source is enclosed by a protective enclosure and is temporarily connected to

the fixed wiring. Temporarily installed protected lighting chains are primarily suitable for use in rough service lighting

applications.

For lighting chains with non-standardized lamps (e.g. lamps of the push-in type) the lamps are

regarded as a part of the lighting chain and consequently included in the testing.

NOTE 4 For products where the lighting chain is permanently fixed to a frame or pre-lit Christmas tree the relevant

clauses of IEC 60598-2-4 can also apply.
NOTE 5 In some countries the term "strings" is used instead of "chains".
NOTE 6 Candlestick luminaries are tested according to IEC 60598-2-4.
20.2 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 60227-5:2011, Polyvinyl chloride insulated cables of rated voltages up to and including

450/750 V – Part 5: Flexible cables (cords)
---------------------- Page: 9 ----------------------
– 8 – IEC 60598-2-20:2022 © IEC 2022
IEC 60238:2016, Edison screw lampholders
IEC 60238:2016/AMD1:2017
IEC 60238:2016/AMD2/2020

IEC 60309-1, Plugs, socket-outlets and couplers for industrial purposes – Part 1: General

requirements

IEC 60320 (all parts), Appliance couplers for household and similar general purposes

IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 60598-1, Luminaires – Part 1: General requirements and tests

IEC 60906 (all parts), IEC system of plugs and socket-outlets for household and similar

purposes
IEC 61184:2017, Bayonet lampholders
IEC 61184:2017/AMD1:2019

IEC 61347-2-11, Lamp controlgear – Part 2-11: Particular requirements for miscellaneous

electronic circuits used with luminaires

IEC 61347-2-13, Lamp controlgear – Part 2-13: Particular requirements for d.c. or a.c. supplied

electronic controlgear for LED modules
IEC 61984:2008, Connectors – Safety requirements and tests

ISO 4046-4:2016, Paper, board, pulps and related terms – Vocabulary – Part 4: Paper and

board grades and converted products
20.3 Terms and definitions

For the purpose of this document, the terms and definitions given in IEC 60598-1 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
20.3.1
lighting chain

luminaire comprising an assembly of series-connected lamps, parallel-connected lamps or

series/parallel-connected lamps and interconnecting insulated conductors

Note 1 to entry: For lighting chains with non-standardized lamps (e.g. lamps of the push-in type) the lamps are

regarded as part of the chain.

Note 2 to entry: For lighting chains with non-removable lamps, the lamps are regarded as part of the chain.

Note 3 to entry: A lighting chain may incorporate control devices (e.g. flasher units, see 20.7.8).

Note 4 to entry: Unless otherwise stated, references to lamps within this document also refer to LEDs.

---------------------- Page: 10 ----------------------
IEC 60598-2-20:2022 © IEC 2022 – 9 –
20.3.2
rope light
sealed lighting chain

lighting chain with non-replaceable light sources enclosed in a rigid or flexible insulating

translucent pipe or tube, sealed at the ends, with or without joints
Note 1 to entry: Rope lights are covered by IEC 60598-2-21.
20.3.3
connector with breaking capacity
CBC

connector specially designed to be engaged or disengaged in normal use when live or under

load
[SOURCE: IEC 60050-581:2008, 581-27-72]
20.3.4
permanently installed lighting chain

lighting chain that is supported by the supply cable or attached at the lampholder and is

permanently connected to the fixed wiring
EXAMPLE Lighting chain for illuminating ski-tracks or promenades.

Note 1 to entry: Permanently installed lighting chains are primarily suitable for permanently installed indoor or

outdoor lighting applications, see Figure 1 a) for examples.

Note 2 to entry: In some countries permanently installed lighting chains are called festoon lighting chains.

20.3.5
temporarily installed lighting chain

lighting chain that is supported by the supply cable and is temporarily connected to the fixed

wiring
EXAMPLE Christmas tree lighting chain.

Note 1 to entry: Temporarily installed lighting chains are suitable for domestic, indoor or indoor/outdoor temporarily

installed lighting applications, see Figure 1 b) for examples.

Note 2 to entry: In some countries temporarily installed lighting chains are called decorative lighting chains.

20.3.6
temporarily installed protected lighting (TPL) chain

lighting chain where each lampholder is attached to the building or structure and the light source

is enclosed by a protective enclosure and is temporarily connected to the fixed wiring

EXAMPLE Construction site lighting chain.

Note 1 to entry: Temporarily installed protected lighting chains are primarily suitable for use in rough service lighting

applications, see Figure 1 c) for example.
---------------------- Page: 11 ----------------------
– 10 – IEC 60598-2-20:2022 © IEC 2022
(i) Attached at lampholder (ii) Supported by supply cable
a) Permanently installed lighting chains
(i) Decorative lighting chain (ii) Decorative lighting chain
b) Temporarily installed lighting chains
c) Temporarily installed protected lighting (TPL) chain
Figure 1 – Examples of different types of lighting chains
20.4 General test requirements

The provisions of Section 0 of Part 1 apply. The tests described in each appropriate section of

Part 1 shall be carried out in the order listed in this document.
20.5 Classification of luminaires
20.5.1 General

Lighting chains shall be classified in accordance with the provisions of Section 2 of Part 1

together with the requirements of 20.5.2 and 20.5.3.
20.5.2 Protection against electric shock
Lighting chains shall be classified as Class II or Class III.
20.5.3 Protection against dust, solid objects and moisture
Lighting chains for outdoor use shall have a protective index IP 44 or higher.
20.6 Marking
20.6.1 General

The provisions of Section 3 of Part 1 apply together with the requirements of 20.6.2 to 20.6.4.

---------------------- Page: 12 ----------------------
IEC 60598-2-20:2022 © IEC 2022 – 11 –
20.6.2 Lighting chain marking
The following information shall be marked on the lighting chain:
– rated voltage of the complete chain;
– rated wattage of the complete chain.

Where the information is on the cable, it shall be marked on a durable non-removable sleeve

or label.
20.6.3 Lighting chain and packaging marking

The following marking shall be placed on the lighting chain and on the accompanying packaging

of lighting chains for indoor use only.
– "FOR INDOOR USE ONLY".

– As an alternative to the text, the lighting chain can be marked with the symbol

IEC 60417-5957 (2004-12). The symbol shall be explained in the instructions.

NOTE In some countries (UK and Australia) national requirements are such that a plug must be fitted to a portable

appliance. In situations where this plug does not provide the same ingress protection of the lighting chain, information

concerning the location of the plug/transformer may be given e.g. "Plug/transformer for indoor use only".

20.6.4 Packaging or instructions marking

The following or similar marking shall be placed on the accompanying packaging or instructions.

a) For all lighting chains where the packaging has not been adapted for display purposes:

– "Do not connect the chain to the supply whil
...

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