IEC 61439-1 Minimum Size for PE, PEN Conductors

Background

In 2010, the new standard IEC 61439 series was published to replace the IEC 60439 series.

The purpose of the IEC 61439 series of standards is to harmonize as far as practicable, all the general rules and requirements that apply to LV Switchgears and Controlgears (ASSEMBLIES) and to obtain uniformity of requirements, consistency in the verification and to avoid the need for verification to other standards.

The table below provides a guidline on the minimum size of PE/PEN conductors. This table has been similar to Table 3 IEC 60439-1 (1999) except for the addition of a note about harmonics.

Minimum terminal capacity for copper protective conductors (PE, PEN)
Cross-sectional area of phase conductors S
mm2
Minimum cross-sectional area of the corresponding protective conductor (PE, PEN) Spa
mm2
S ≤ 16 S
16 < S ≤ 35 16
35 < S ≤ 400 S/2
400 < S ≤ 800 200
800 < S S/4
a Current in the neutral may be influenced where there are significant harmonics in the load.

Source: IEC 61439-1 2011 Table 5

About the Author

Ver Pangonilo
A Filipino Engineer, Registered Professional Engineer of Queensland (RPEQ) - Australia and Professional Electrical Engineer (PEE) - Philippines with extensive experience in concept select, front-end engineering, HV & LV detail design, construction and commissioning of Hazardous and Non-Hazardous Area electrical installations in water and waste water pipeline and pumping facilities, offshore platforms, hydrocarbon process plants and pipelines including related facilities. Hazardous area classification and design certification (UEENEEM015B, UEENEEM016B, UEENEEM017B).
WP Facebook Auto Publish Powered By : XYZScripts.com