17th edition question
I was thinking to have a fixed wall-mount 30mA RCD at a location other than the CU (call this the Remote RCD). I am not sure if it is actually worth doing now, but it begs a question:
The wiring to the Remote RCD would ordinarily be buried less than 50mm deep, in safe zones.
AIUI under the 17th ed, shallow buried wiring must be after a suitable RCD.
Of course two daisy-chained RCDs with the same trip characteristics is a no-no because you lose discrimination.
So the feed to the Remote RCD would be looking to be non-RCD, but that would break 17th ed rules.
So I wondered if it would be OK if the wiring to the Remote RCD was inside (earthed) metal conduit.
I was thinking to have a fixed wall-mount 30mA RCD at a location other than the CU (call this the Remote RCD). I am not sure if it is actually worth doing now, but it begs a question:
The wiring to the Remote RCD would ordinarily be buried less than 50mm deep, in safe zones.
AIUI under the 17th ed, shallow buried wiring must be after a suitable RCD.
Of course two daisy-chained RCDs with the same trip characteristics is a no-no because you lose discrimination.
So the feed to the Remote RCD would be looking to be non-RCD, but that would break 17th ed rules.
So I wondered if it would be OK if the wiring to the Remote RCD was inside (earthed) metal conduit.