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100mA RCD location TT??

So I believe a 100mA time delay RCD is required for a TT system if a split load board but not an RCBO board, why the difference?? Also any regs reference please?

I have been told that I can just swap out the isolator switch in the board for an RCD however I read that the RCD should be upstream in a plastic enclosure?

Any input appriciated

Metal enclosure BTW...

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0 Chris Pearson over 2 years ago

I would put the RCD in one of these - just swap it for the 2-pole switch. The components are available separately. https://www.toolstation.com/wylex-2-pole-isolator-switch-with-enclosure/p55771
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0 Chris Pearson over 2 years ago

I would put the RCD in one of these - just swap it for the 2-pole switch. The components are available separately. https://www.toolstation.com/wylex-2-pole-isolator-switch-with-enclosure/p55771
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0 ebee over 2 years ago in reply to Chris Pearson

Whether Dual RCDs or all RCBOs or a mix and match thingy. I would prefer a pre - metalic CU to be fed at least by a 100mA TD RCD in it`s own insulated enclosure. Note the RCDs are in the CU are usually double pole anyway but you`d have to make sure any RCBOs are truly double pole switching and not of solid N link input.

Pre-metalic? that did not sound right! I meant the insulated RCD is feeding the metallic consumer unit so at least you`d have RCD protection before the metal consumer unit, even if only 100mA and time delayed
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100mA RCD location TT??

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