HD 60364-1:2008/A11:2017

Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, definitions

2021: CLC legacy converted by DCLab NISOSTS

Errichten von Niederspannungsanlagen - Teil 1: Allgemeine Grundsätze, Bestimmungen allgemeiner Merkmale, Begriffe

Installations électriques à basse tension - Partie 1: Principes fondamentaux, détermination des caractéristiques générales, définitions

Nizkonapetostne električne inštalacije - 1. del: Temeljna načela, ocena splošnih karakteristik, definicije - Dopolnilo A11

General Information

• Status: Published
• Publication Date: 10-Aug-2017
• Withdrawal Date: 30-May-2020
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: CLC/TC 64 - Electrical installations and protection against electric shock
• Drafting Committee: CLC/TC 64 - Electrical installations and protection against electric shock
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 11-Aug-2017
• Completion Date: 11-Aug-2017
• Ref Project: SIST HD 60364-1:2008/A11:2017 - Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, definitions

Relations

• Amends: HD 60364-1:2008 - Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, definitions
• Effective Date: 11-Jul-2017
• Revised: FprHD 60364-1:2025 - Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, and definitions
• Effective Date: 15-Mar-2022

Overview

HD 60364-1:2008/A11:2017 is a CENELEC harmonization document for low-voltage electrical installations, covering the fundamental principles, assessment of general characteristics, and definitions. Amendment A11 (approved 31 May 2017) updates the original HD 60364-1:2008 and includes an informative Annex ZB on national deviations (A-deviations). The document guides national committees on consistent implementation across CENELEC members and sets deadlines for national adoption and withdrawal of conflicting standards.

Key topics and requirements

• Fundamental principles for the design and execution of low-voltage electrical installations, establishing the conceptual and safety framework for wiring regulations.
• Assessment of general characteristics, defining how installations are classified and assessed for safety, capacity and functional performance.
• Definitions of terms used across the HD 60364 series to ensure uniform interpretation.
• Annex ZB (A-deviations): explains national deviations that remain valid where national regulations supersede harmonized provisions. Example provisions shown in the amendment include national rules from Denmark covering:
  • Minimum number of final circuits for dwellings (calculation method based on total living area and a minimum of two final circuits; treatment of two-/three-phase circuits and exclusions for high-energy equipment).
  • Minimum number and distribution of 250 V socket-outlets (e.g., at least one per 4 m² up to a maximum, specific kitchen and kitchenette requirements, exemptions for small bathrooms and certain ancillary spaces).
  • Conditions for using TN supply systems and restrictions on TN‑C systems after the first switchgear (requirements for separate protective and neutral conductors, with limited exceptions for existing installations or substations).

Applications

• Use this standard when preparing or updating national wiring regulations, technical specifications, and installation rules for low-voltage systems.
• Reference for electrical designers and consulting engineers to align installation principles and definitions with European harmonized practice.
• Useful to installation contractors, safety inspectors and auditors for compliance checks where national deviations are declared.
• Supports regulators and standards bodies during national implementation, endorsement, or when documenting allowed A-deviations.

Who uses this standard

• Electrical engineers, installation designers, contractors, electrical safety inspectors, regulatory authorities, and national electrotechnical committees (CENELEC members).

Related standards

• HD/IEC/IEC 60364 family (low-voltage electrical installations) - consult the broader 60364 series and national adoptions for detailed wiring rules and protective measures.

Keywords: HD 60364-1:2008/A11:2017, low-voltage electrical installations, CENELEC harmonization, TN system, socket-outlets, electrical safety, wiring regulations, national deviations.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2017
1L]NRQDSHWRVWQHHOHNWULþQHLQãWDODFLMHGHO7HPHOMQDQDþHODRFHQDVSORãQLK
NDUDNWHULVWLNGHILQLFLMH'RSROQLOR$
Low-voltage electrical installations - Part 1: Fundamental principles, assessment of
general characteristics, definitions
Errichten von Niederspannungsanlagen - Teil 1: Allgemeine Grundsätze, Bestimmungen
allgemeiner Merkmale, Begriffe
Installations électriques à basse tension - Partie 1: Principes fondamentaux,
détermination des caractéristiques générales, définitions
Ta slovenski standard je istoveten z: HD 60364-1:2008/A11:2017
ICS:
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 60364-1:2008/A11

DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT
August 2017
ICS 91.140.50
English Version
Low-voltage electrical installations - Part 1: Fundamental
principles, assessment of general characteristics, definitions
Installations électriques à basse tension - Partie 1: Errichten von Niederspannungsanlagen - Teil 1: Allgemeine
Principes fondamentaux, détermination des caractéristiques Grundsätze, Bestimmungen allgemeiner Merkmale, Begriffe
générales, définitions
This amendment A11 modifies the Harmonization Document HD 60364-1:2008; it was approved by CENELEC on 2017-05-31. 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, 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. HD 60364-1:2008/A11:2017 E

European foreword
This document (HD 60364-1:2008/A11:2017) 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 (dop) 2018-05-31
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2020-05-31
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.
1 Addition of Annex ZB
Add a new Annex ZB as follows:
Annex ZB
(informative)
A-deviations
A-deviation: National deviation due to regulations, the alteration of which is for the time being outside
competence of the CENELEC national member.
This Harmonization Document does not fall under any Directive of the EC.
In the relevant CENELEC countries these A-deviations are valid instead of the provisions of the
Harmonization Document until they have been removed
Country Clause Reference to Nation
...