BEAMA Guide to Low Voltage Circuit-Breaker Standards - August 2026
17 August 2026
This BEAMA publication a “Guide to Low Voltage Circuit-Breakers Standards” is a comprehensive practical resource for designers, specifiers and installers to enable them to specify low voltage circuit-breakers in accordance with the BS EN 60898 series and BS EN IEC 60947-2.
It specifically addresses the application and specification of circuit-breakers in accordance with the BS EN 60898 series (for household and similar installations) and BS EN IEC 60947-2 (for industrial and large commercial installations).
Our experts explain the harmonization of international, European, and UK standards, details the types and characteristics of circuit-breakers (such as MCBs, MCCBs, and ACBs), and covers critical topics like rated values, installation factors, protection coordination, and the impact of harmonics.
The guide also emphasizes the importance of using verified devices, following manufacturer instructions, and understanding the implications of regulatory changes post-Brexit. It serves as both a reference and an educational tool for professionals seeking to ensure their installations meet current safety and performance standards.
With specific focus on the following:
Presumption of conformity
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Application of breaking capacities Icn1 and Icu1
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Application of 1P+N or 3P+N (solid Neutral) devices