Leslie Harris asks this question, which concerns a new TP&N 100A PME supply, its meter installation, and EDF Energy’s supposed main bonding conductor size requirement. It has been answered by the ECA (Theme – Regulations & Legislation):
Question: I have a new TP&N 100A protective multiple earth (PME) supply into a domestic property. The main tails are 25mm2 with a 16mm2 main earthing conductor and 10mm2 main bonding conductors.
An EDF metering engineer attended the site and refused to install the meter as he wants 16mm2 main bonds as this is, he says, the EDF requirement.
Is this correct? And if so, where is this documented, as it is not stated in any paperwork received from EDF or UK Power networks.
Answer: No, I do not think that the EDF engineer is correct in this matter. Ask EDF to show you where this requirement comes from.
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