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Discuss TT earthing question in the Electrical Forum area at ElectriciansForums.net

loplug

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Arms
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I'm working on a Job where the earth is TT there is a sub main fed by 16mm twin and earth if I put a earth rod in at the submain position should I connect the cpc of the submain to the earth rod at the sub dB or just use it as a cpc and earth the sub board separately ?
 
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Welchyboy1

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Link all the tt earthing together, this will eliminate potential difference between points and also hopefully lower your total ra reading
 
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