SIST HD 60364-4-42:2011/A1:2015

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

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

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 A1

General Information

• Status: Published
• Publication Date: 15-Mar-2015
• 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: 16-Jan-2015
• Due Date: 23-Mar-2015
• Completion Date: 16-Mar-2015
• Ref Project: HD 60364-4-42:2011/A1:2015 - Low voltage electrical installations - Part 4-42: Protection for safety - Protection against thermal effects

Relations

• Amends: SIST HD 60364-4-42:2011 - Low voltage electrical installations - Part 4-42: Protection for safety - Protection against thermal effects
• Effective Date: 28-Jan-2023

Overview

HD 60364-4-42:2011/A1:2015 is the CENELEC harmonization document that adopts IEC 60364-4-42:2010 with Amendment 1 (2014). It covers protection for safety against thermal effects in low-voltage electrical installations, with a particular emphasis on risk reduction from electrical fires caused by arcing. This amendment introduces requirements and recommendations for arc fault detection devices (AFDDs) and updates normative references relevant to fire performance and protective devices.

Key Topics

• Scope: Protection against thermal effects (overheating and fire ignition) in low-voltage installations.
• Arc fault mitigation: Introduction of AFDDs as a recommended measure to reduce ignition risk from series and parallel arcing faults.
• Recommended locations for AFDDs:
  • Premises with sleeping accommodation
  • Locations with materials prone to fire (BE2)
  • Buildings with combustible construction materials (CA2)
  • Fire-propagating structures (CB2)
  • Locations with irreplaceable goods
• Device placement: An AFDD should be installed at the origin of the final circuit it protects.
• AFDD types (per IEC 62606):
  • AFDD as a separate AFD unit plus an opening device (used with a compatible overcurrent device)
  • AFDD integrated with a protective device (e.g., circuit-breaker)
  • AFDD unit declared to be assembled with a specified protective device on site
• Limitations: AFDDs complement but do not replace other protective measures (e.g., overcurrent protection, RCDs).
• Country notes: The amendment adds national notes such as USA requirements (NFPA 70 article 210.12) where arc-fault protection (AFCI) is mandated in specific living areas.

Applications

Who uses this standard and why:

• Electrical designers and specifiers - to select appropriate protective devices and layout final circuits to reduce fire risk.
• Installers and contractors - for correct placement and integration of AFDDs in residential, agricultural, and combustible-material environments.
• Building owners and facility managers - to apply proven measures that reduce the risk of fire and protect property and occupants.
• Product manufacturers and test laboratories - to design, test and certify AFDDs in compliance with IEC 62606 referenced by this amendment.
• Regulators and code committees - to incorporate AFDD recommendations into national standards and building codes.

Related Standards

• IEC 60364-4-42 (base document)
• IEC 62606 - General requirements for arc fault detection devices (added normative reference)
• IEC 60898-1, IEC 61009-1, IEC 61008-1, IEC 60269, IEC 62423 (protective devices)
• ISO 1182, ISO 1716 (reaction to fire / non-combustibility)
• NFPA 70 (USA: AFCI requirements)

Keywords: HD 60364-4-42:2011/A1:2015, IEC 60364-4-42, AFDD, arc fault detection devices, low voltage installations, protection against thermal effects, electrical fire prevention, IEC 62606, NFPA 70.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2015
1L]NRQDSHWRVWQHHOHNWULþQHLQãWDODFLMHGHO=DãþLWQLXNUHSL=DãþLWDSUHG
WRSORWQLPLXþLQNL'RSROQLOR$
Low voltage electrical installations - Part 4-42: Protection for safety - Protection against
thermal effects
Errichten von Niederspannungsanlagen - Teil 4-42: Schutzmaßnahmen - Schutz gegen
thermische Einflüsse
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/A1:2015
ICS:
29.120.50 9DURYDONHLQGUXJD Fuses and other overcurrent
PHGWRNRYQD]DãþLWD 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/A1

DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT
January 2015
ICS 29.120.50; 91.140.50
English Version
Low voltage electrical installations - Part 4-42: Protection for
safety - Protection against thermal effects
(IEC 60364-4-42:2010/A1:2014)
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 Einflüsse
effets thermiques (IEC 60364-4-42:2010/A1:2014)
(IEC 60364-4-42:2010/A1:2014)
This amendment A1 modifies the Harmonization Document HD 60364-4-42:2011; it was approved by CENELEC on 2014-12-18. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. HD 60364-4-42:2011/A1:2015 E

Foreword
The text of document 64/1974/FDIS, future IEC 60364-4-42:2010/A1, prepared by IEC/TC 64
"Electrical installations and protection against electric shock" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as HD 60364-4-42:2011/A1:2015.
The following dates are fixed:
(dop) 2015-09-18
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2017-12-18
• latest date by which the national standards conflicting with
the 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 [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 60364-4-42:2010/A1:2014 was approved by CENELEC as
a European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
ISO 1182 NOTE Harmonized as EN ISO 1182.
ISO 1716 NOTE Harmonized as EN ISO 1716.
IEC 60898-1 NOTE Harmonized as EN 60898-1.
IEC 61009-1 NOTE Harmonized as EN 61009-1.
IEC 60269 NOTE Harmonized in EN/HD 60269 series (modified).
IEC 61008-1 NOTE Harmonized as EN 61008-1.
IEC 62423 NOTE Harmonized as EN 62423.

- 3 - HD 60364-4-42:2011/A1:2015
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is
available here: www.cenelec.eu.

Addition in Annex ZA of HD 60364-4-42:2011:
Publication Year Title EN/HD Year
IEC 62606 -  General requirements for arc fault detection EN 62606 -
devices
IEC 60364-4-42 ®
Edition 3.0 2014-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Low-voltage electrical installations –

Part 4-42: Protection for safety – Protection against thermal effects

Installations électriques basse tension –

Partie 4-42: Protection pour assurer la sécurité – Protection contre les effets

thermiques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX D
ICS 29.120.50; 91.140.50 ISBN 978-2-8322-1919-5

– 2 – IEC 60364-4-42:2010/AMD1:2014
© IEC 2014
FOREWORD
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