Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This one, about the possible linking of distribution board earth bars, is answered by the NICEIC:
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Question: I am wondering if there is a regulation stating that earth bars within a distribution board must be linked if both are being used. Would regulation 542.3.2 cover this query?
Answer: It is seen as good practice, and frequently carried out, to ensure the electrical continuity of switchgear, please see Regulation 543.2.4 (i).
However, distribution board manufactures may advise that it is NOT necessary to link earth bars as they are already sufficiently connected via the case of the enclosure. In this instance, continuity is achieved as each individual earth bar is fastened to the case via an earthing strap, and hence to each other via the case. Also see Regulation 511.1.
To see many more Q & A in Voltimum UK's Experts Area, please click on the link: www.voltimum.co.uk/consult.php?universe=consult.index.questions
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