Earth conductor size for TT

asalcedo · 2013-07-25T20:59:27+00:00

I am changing from TN-S to TT earthing system at home. I will use an unprotected, non buried, earthing cable from the earth rodto the earth block. No phase conductor in the house is larger than 10mm2 To be in compliance with the regulations, which minimum size of earthingcable do I have to use? Thanks, Antonio

Jul 25, 2013 21 Replies

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Adam Funk 12 years ago

Interesting point.

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Andy Wade 12 years ago

Only if you're also changing the consumer unit.

Since the revision of Part P in April the only electrical work that's notifiable is:

- installation of a new circuit,

- replacement of a consumer unit,

- additions or alterations within the zones of a bath/shower room,

- additions or alterations in a room containing a swimming pool or sauna heater (regardless of zones).

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