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Well spotted John....I'll see if I can find that somewhere. Thanks very much for your help Best regards. Anthony

Thanks for your replies. I think what you're all saying is that twin & earth could be used underground if it was run in earthed ducting or conduit which provided the same degree of mechanical protection as an earthed armoured cable.....Does anyone know if the regs ever actually quantify the...

Hi all, I'm new to this forum. I'm currently retraining and studying for my 17th Edition Regs and stumbled across this (rather old) post. I'm a bit confused by the following comment: I'm looking at the reg. 522.8.10 and the way I interpret it is that twin and earth could be installed...