Published: 16 December 2010
Category: Q&A
Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This Question of the Day, concerning 'sub-main' and 'distribution circuit' terminology, is answered by the ECA:
Question: In the definitions section of BS7671:2008 (the 17th Edition), the term 'distribution circuit' is in there, but the term 'sub-main' isn't.
Is the term 'sub-main' simply another name for a distribution circuit?
Answer: It states in the definition of a distribution circuit that a distribution circuit connecting a outlying building or a separate installation is sometimes called a sub-main.
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