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ARW

On 15/05/2019 17:30, wrote:
On Wednesday, 15 May 2019 17:15:35 UTC+1, Tricky Dicky wrote:
I do want discrimination in the garage ...
Is there any reason why the garage circuit cannot be protected by
an RCBO at the house CU

Yes, discrimination.

AFAICS no time-delay / 100mA RCDs are available as RCBOs, so you'd need to allow for a 2-module time-delay RCD and an MCB for the garage - if they're available in BG.

Also someone will hopefully clarify whether 100mA time-delay is acceptable for protecting buried cable.

It should be 30mA non time delayed.

Or make it a deviation from the regs and don't RCD it.

--
Adam