SIST HD 60364-4-42:2011/A11:2022

Low voltage electrical installations - Part 4-42: Protection for safety - Protection against thermal effects

NEXT ACTION: TC action by 2021-11-01
2021-06-24 MDC: Document on hold awaiting BT approval of A-deviations
2019-10-01: upcoming CLC/TC 64 request to CLC/BT to proceed with a second formal vote.

Errichten von Niederspannungsanlagen - Teil 4-42: Schutzmaßnahmen - Schutz gegen thermische Auswirkungen

Installations électriques basse tension - Partie 4-42: Protection pour assurer la sécurité - Protection contre les effets thermiques

Nizkonapetostne električne inštalacije - 4-42. del: Zaščitni ukrepi - Zaščita pred toplotnimi učinki - Dopolnilo A

General Information

• Status: Published
• Publication Date: 09-Jan-2022
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: ELI - Electrical and communication installations
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 03-Jan-2022
• Due Date: 10-Mar-2022
• Completion Date: 10-Jan-2022
• Ref Project: HD 60364-4-42:2011/A11:2021 - Low voltage electrical installations - Part 4-42: Protection for safety - Protection against thermal effects

Overview

HD 60364-4-42:2011/A11:2021 is a CENELEC harmonization amendment to the European guidance on low voltage electrical installations focused on protection for safety - protection against thermal effects. Amendment A11 (approved 2021-07-13) updates the 2011 document to reflect fire-performance rules for cables and cable systems, integrates the Construction Products Regulation (CPR) approach to reaction to fire, and adds national “A-deviations” and special national conditions for implementation. Key national implementation deadlines were set (latest publication date dop 2022-06-17; conflicting national standards withdrawn by dow 2024-12-17).

Key topics and technical requirements

• Reaction to fire for cables: The amendment aligns cable requirements with the CPR and EN 13501-6 fire classification. It introduces minimum fire-test classes (EN 13501-6) as benchmarks and notes national authorities may require higher classes.
• Minimum cable classes: Normative guidance and recommendations in the amendment reference classes such as C‑s1,d2,a1, B2‑s1,d2,a1 and minimums (e.g., class E or D depending on clause and country). Several clauses recommend C‑s1,d2,a1 for higher-risk environments (BD2/BD3) and B2 for BD4.
• Cable management systems: Conduit, trunking, tray, ladder and powertrack systems are required to be non-flame propagating per their respective EN standards (EN 61386, EN 50085, EN 61537, EN 61534).
• Enclosures and boxes: Hollow-wall boxes and enclosures must comply with EN 60670-1; fire-safe enclosures and suitable cable classes are required where installations could promote fire spread.
• Clause modifications and annexes: The amendment modifies Clauses 420.1, 420.2, 422.2.1, 422.3.4, 422.5.1 and updates Annexes ZA/ZB/ZC to reflect normative references, special national conditions and A-deviations.

Practical applications and users

This document is essential for:

• Electrical designers and specifiers selecting cable types and management systems for buildings.
• Installers and contractors implementing low voltage electrical installations with attention to fire safety.
• Cable and accessory manufacturers declaring reaction to fire performance under CPR and meeting EN 13501-6 classes.
• Fire safety engineers, building authorities and compliance bodies assessing national deviations and statutory requirements.
• Test labs and certification bodies applying the referenced EN tests.

Related standards

• EN 13501-6 (fire classification of power/control/communication cables)
• EN 60332 series / EN 60332-1-2 / EN 60332-3 (cable flame tests) - referenced/updated by national texts
• EN 60670-1 (boxes and enclosures)
• EN 61386, EN 50085, EN 61537, EN 61534 (cable management and powertrack systems)
• EN 50575 (CE marking / CPR for cables)

This amendment highlights the interplay between harmonized electrical installation rules, the CPR, and national safety requirements - a must-read when specifying cables and cable systems for fire-safe low-voltage installations.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2022
Nizkonapetostne električne inštalacije - 4-42. del: Zaščitni ukrepi - Zaščita pred
toplotnimi učinki - Dopolnilo A
Low voltage electrical installations - Part 4-42: Protection for safety - Protection against
thermal effects
Errichten von Niederspannungsanlagen - Teil 4-42: Schutzmaßnahmen - Schutz gegen
thermische Auswirkungen
Installations électriques basse tension - Partie 4-42: Protection pour assurer la sécurité -
Protection contre les effets thermiques
Ta slovenski standard je istoveten z: HD 60364-4-42:2011/A11:2021
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

HARMONIZATION DOCUMENT HD 60364-4-42:2011/A11

DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT
December 2021
ICS 29.120.50; 91.140.50
English Version
Low voltage electrical installations - Part 4-42: Protection for
safety - Protection against thermal effects
Installations électriques basse tension - Partie 4-42: Errichten von Niederspannungsanlagen - Teil 4-42:
Protection pour assurer la sécurité - Protection contre les Schutzmaßnahmen - Schutz gegen thermische
effets thermiques Auswirkungen
This amendment A11 modifies the Harmonization Document HD 60364-4-42:2011; it was approved by CENELEC on 2021-07-13.
CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of
this amendment at national level.
Up-to-date lists and bibliographical references concerning such national implementations may be obtained on application to the CEN-
CENELEC Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German).
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. HD 60364-4-42:2011/A11:2021 E

Contents Page
European foreword . 3
1 Modifications to the “Foreword” . 4
2 Modification to Clause 420.1, “Scope” . 4
3 Modification to Clause 420.2, “Normative references” . 4
4 Modification to 422.2.1 . 4
5 Modification to 422.3.4 . 5
6 Modification to 422.5.1 . 5
7 Modification to Annex ZA, “Normative references to international publications with their corresponding
European publications” . 5
8 Additions to Annex ZB, “Special National Conditions” . 5
9 Additions to Annex ZC, “A-Deviations” . 8
10 Modifications to the “Bibliography” . 9
European foreword
This document (HD 60364-4-42:2011/A11:2021) has been prepared by CLC/TC 64 “Electrical installations and
protection against electric shock”.
The following dates are fixed:
• latest date by which this document has to (dop) 2022-06-17
be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2024-12-17
standards conflicting with this document
have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A complete
listing of these bodies can be found on the CENELEC website.
1 Modifications to the “Foreword”
At the end of the third paragraph of the Foreword (starting with “The main changes with respect to the previous
edition are listed below”), add the following new bullet point and Note:
— “For cables, the provisions of the Construction Products Regulation ((EU) No. 305/2011 (CPR)) came fully
into force on 1st July 2017 in respect of Reaction to Fire. These requirements are now expressed by
reference to the relevant class according to EN 13501-6.
NOTE See also Note 3 in the Scope.”
2 Modification to Clause 420.1, “Scope”
In the Scope, add the following after Note 2:
“In respect of cables and their reaction to fire, these protective measures can be expressed by reference to
the Construction Products Regulation (CPR), and the relevant classes according to EN 13501-6.
NOTE 3 Whilst the CPR requires the manufacturer to declare the reaction to fire performance of the cable in
accordance with procedures and classifications that are common across the EU, it is the responsibility of the Member State
to determine which classification is required for any particular application or installation. National statutory requirements
could therefore override the levels quoted here.”
3 Modification to Clause 420.2, “Normative references”
In Clause 420.2, add the following references:
“EN 13501-6, Fire classification of construction products and building elements - Part 6: Classification using
data from reaction to fire tests on power, control and communication cables
EN 60670-1, Boxes and enclosures for electrical accessories for household and similar fixed electrical
installations - Part 1: General requirements (IEC 60670-1)”
4 Modification to 422.2.1
In 422.2.1, replace Note 1 with the following Note:
“
NOTE 1
For cables, compliance with this requirement is achieved by using at least class C -s1,d2,a1 for cables installed in
ca
environment BD2, BD3, and to apply at least class B2 -s1,d2,a1 for cables installed in environment BD4.
ca
For conduit systems, cable trunking systems, cable tray systems and powertrack systems, compliance with this
requirement is achieved by using the following products:
—  conduit systems classified as non-flame propagating according to EN 61386 series;
—  cable trunking systems classified as non-flame propagating according to EN 50085 series;
—  cable tray systems and cable ladder systems classified as non-flame propagating according to EN 61537;
—  powertrack systems complying with EN 61534 series.”
Replace Note 3 with the following normative text:
“It is recommended to apply at least class C -s1,d2,a1 for cables installed in environment BD 2 or BD 3 and
ca
to apply at least class B2 -s1,d2,a1for cables installed in environment BD 4.”
ca
5 Modification to 422.3.4
In 422.3.4, replace the first bullet point:
— “Cables shall satisfy the test under fire conditions specified in EN 60332 series”
with:
— “Cables shall satisfy as a minimum the fire test requirements of class E as described in EN 13501-6”
ca
Replace Note 1 with the following normative text:
“Where the risk of flame propagation is high, e.g. in long vertical runs of bunched cables, it is recommended
to apply cables at least fulfilling the requirements of class C -s1,d2,a1 as defined in EN 13501-6.”
ca
Delete Note 2.
6 Modification to 422.5.1
Replace the Note with the following normative text:
“Fire detectors may be provided which ensure the implementation of measures for preventing propagation of
fire, for example, the closing of fire-proof shutters in ducts, building voids and the like. Boxes and enclosures
according to EN 60670-1 for hollow walls shall be used. Cables shall fulfil the requirements of EN 13501-6, at
least a minimum of a class C -s1,d2,a1.”
ca
7 Modification to Annex ZA, “Normative references to international publications
with their corresponding European publications”
Add the following new references to the Annex ZA:
“
Publication Year Title EN/HD Year
Fire classification of construction products and EN 13501-6 -
building elements - Part 6: Classification using
data from reaction to fire tests on electric cables
Boxes and enclosures for electrical EN 60670-1 -
accessories for household and similar fixed
electrical installations - Part 1: General
requirements
“
8 Additions to Annex ZB, “Special National Conditions”
Add the following Special National Conditions:
“
Country Clause Special national condition
420.1 In the Netherlands, the class for “reaction to fire” in accordance to EN 13501-6 shall
NL
comply with NEN 8012.
SK 420.1 In Slovakia, for the fire protection of buildings STN 92 0203 applies.
AT 422.2.1 In Austria, for wiring in escape routes there are special conditions established by federal
state authorities.
Country Clause Special national condition
422.2.1 Change the wording NOTE 1 for cables by the following:
Note 1 For cables
It is recommended to use cables in accordance with clause 4.1 of EN 50575: 2014 + A1:
2016 for reasons of evacuation according to 422.2, which have at least performance
DE
B1 -s1 (flame-retardant and with low smoke emission). Cable systems that supply
ca
circuits for safety purposes must be protected or designed in such a way that they can
fulfill their function for the duration of the national fire protection regulations or, if these
regulations do not exist, for a duration of at least 1 hour.
422.2.1 In Switzerland:
CH
d2 is considered as “critical behaviou
...