IEC 60364-1:2025
Collections
International IEC standards
Publication date
September 2025
Number of pages
99 p.
Reference
IEC 60364-1:2025
Print number
6
IEC 60364-1:2025
September 2025
International standard
Current
Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, and definitions
IEC 60364-1:2025 defines the scope and objective of the IEC 60364 series and specifies the fundamental safety requirements for an electrical installation.This document addresses the fundamental principles, assessment of general characteristics and definitions of low-voltage electrical installations.This sixth edition cancels and replaces the fifth edition published in 2005. This edition constitutes a technical revision.This edition includes the following significant technical changes with respect to the previous edition:a) the entire document has been restructured and renumbered, maintaining the numbering of the (sub)clauses which are preceded with the part number, i.e. 1.1, 1.2, etc.;b) the scope has been expanded to include new areas of application and has been restructured;c) in 1.5.2.2.2, the topic of safety services and standby electric supply systems has been added;d) in 1.5.2.14, the topic of energy efficiency has been included;e) in 1.5.2.15, the topic of prosumer electrical installations has been included;f) in 1.5.3.5, the requirement for an equivalent safety level for the use of new materials and innovations for which no product standards exist yet has been added;g) in 1.5.4.3, the recommendation to assess the effectiveness of protective measures for the safety of human beings and livestock to be maintained by periodic verification during the entire lifetime of the installation has been added;h) Table 3 shows the symbol for the newly introduced "system-referencing-conductor (SRC)";i) the number of figures showing the type of electric system in AC and DC systems is limited to illustrate requirements.
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Sumary
Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, and definitions
IEC 60364-1:2025 defines the scope and objective of the IEC 60364 series and specifies the fundamental safety requirements for an electrical installation.
This document addresses the fundamental principles, assessment of general characteristics and definitions of low-voltage electrical installations.
This sixth edition cancels and replaces the fifth edition published in 2005. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the entire document has been restructured and renumbered, maintaining the numbering of the (sub)clauses which are preceded with the part number, i.e. 1.1, 1.2, etc.;
b) the scope has been expanded to include new areas of application and has been restructured;
c) in 1.5.2.2.2, the topic of safety services and standby electric supply systems has been added;
d) in 1.5.2.14, the topic of energy efficiency has been included;
e) in 1.5.2.15, the topic of prosumer electrical installations has been included;
f) in 1.5.3.5, the requirement for an equivalent safety level for the use of new materials and innovations for which no product standards exist yet has been added;
g) in 1.5.4.3, the recommendation to assess the effectiveness of protective measures for the safety of human beings and livestock to be maintained by periodic verification during the entire lifetime of the installation has been added;
h) Table 3 shows the symbol for the newly introduced "system-referencing-conductor (SRC)";
i) the number of figures showing the type of electric system in AC and DC systems is limited to illustrate requirements.
IEC 60364-1:2025 defines the scope and objective of the IEC 60364 series and specifies the fundamental safety requirements for an electrical installation.
This document addresses the fundamental principles, assessment of general characteristics and definitions of low-voltage electrical installations.
This sixth edition cancels and replaces the fifth edition published in 2005. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the entire document has been restructured and renumbered, maintaining the numbering of the (sub)clauses which are preceded with the part number, i.e. 1.1, 1.2, etc.;
b) the scope has been expanded to include new areas of application and has been restructured;
c) in 1.5.2.2.2, the topic of safety services and standby electric supply systems has been added;
d) in 1.5.2.14, the topic of energy efficiency has been included;
e) in 1.5.2.15, the topic of prosumer electrical installations has been included;
f) in 1.5.3.5, the requirement for an equivalent safety level for the use of new materials and innovations for which no product standards exist yet has been added;
g) in 1.5.4.3, the recommendation to assess the effectiveness of protective measures for the safety of human beings and livestock to be maintained by periodic verification during the entire lifetime of the installation has been added;
h) Table 3 shows the symbol for the newly introduced "system-referencing-conductor (SRC)";
i) the number of figures showing the type of electric system in AC and DC systems is limited to illustrate requirements.
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Replaced standards
(2)
IEC 60364-1:2005/COR1:2009
August 2009
International standard
Cancelled
Corrigendum 1 - Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, definitions
IEC 60364-1:2005
November 2005
International standard
Cancelled
Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, definitions
Gives the rules for the design, erection, and verification of electrical installations. The rules are intended to provide for the safety of persons, livestock and property against dangers and damage which may arise in the reasonable use of electrical installations and to provide for the proper functioning of those installations. IEC 60364-1 applies to the design, erection and verification of electrical installations such as those of a) residential premises; b) commercial premises; c) public premises; d) industrial premises; e) agricultural and horticultural premises; f) prefabricated buildings; g) caravans, caravan sites and similar sites; h) construction sites, exhibitions, fairs and other installations for temporary purposes; i) marinas; j) external lighting and similar installations; k) medical locations; l) mobile or transportable units; m) photovoltaic systems; n) low-voltage generating sets. IEC 60364-1 covers a) circuits supplied at nominal voltages up to and including 1 000 V a.c. or 1 500 V d.c.; b) circuits, other than the internal wiring of apparatus, operating at voltages exceeding 1 000 V and derived from an installation having a voltage not exceeding 1 000 V a.c., for example, discharge lighting, electrostatic precipitators; c) wiring systems and cables not specifically covered by the standards for appliances; d) all consumer installations external to buildings; e) fixed wiring for information and communication technology, signalling, control and the like (excluding internal wiring of apparatus); f) the extension or alteration of the installation and also parts of the existing installation affected by the extension or alteration. The contents of the corrigendum of August 2009 have been included in this copy.
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