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IEC 61439-3 Ed. 1.0 b:2012

Low-voltage switchgear and controlgear assemblies - Part 3: Distribution boards intended to be operated by ordinary persons (DBO)
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IEC 61439-3 Ed. 1.0 b:2012

Low-voltage switchgear and controlgear assemblies - Part 3: Distribution boards intended to be operated by ordinary persons (DBO)

PUBLISH DATE 2012
IEC 61439-3 Ed. 1.0 b:2012
Low-voltage switchgear and controlgear assemblies - Part 3: Distribution boards intended to be operated by ordinary persons (DBO)
IEC 61439-3:2012 defines the specific requirements for distribution boards intended to be operated by ordinary persons (DBO). DBOs have the following criteria:
- intended to be operated by ordinary persons (e.g. switching operations and replacing fuse-links), e.g. in domestic (household) applications;
- outgoing circuits contain protective devices, intended to be operated by ordinary persons, complying e.g. with IEC 60898-1, IEC 61008, IEC 61009, IEC 62423 and IEC 60269-3;
- rated voltage to earth does not exceed 300 V a.c.;
- rated current (Inc) of the outgoing circuits does not exceed 125 A and the rated current (InA) of the DBO does not exceed 250 A;
- intended for the distribution of electrical energy;
- enclosed, stationary;
- for indoor or outdoor use.
This first edition cancels and replaces the first edition of IEC 60439-3 (1990), Amendment 1 (1993) and Amendment 2 (2001). It constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60439-3 (including the amendments):
- alignment with IEC 61439-1:2011.

This publication is to be read in conjunction with IEC 61439-1:2011.
SDO IEC: International Electrotechnical Commission
Document Number IEC 61439
Publication Date Feb. 1, 2012
Language b - English & French
Page Count
Revision Level 1.0
Supercedes
Committee 121B
Publish Date Document Id Type View
Not Available Revision
Not Available Revision
Not Available Revision
March 1, 2024 Revision
March 1, 2024 IEC 61439-3 Ed. 2.0 b:2024 Revision
Feb. 1, 2012 IEC 61439-3 Ed. 1.0 b:2012 Revision