ianmacd
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So either ring it in 2.5 t&e or conduit with 2.5 singles (with 4mm cpcs) radial or conduit with all 4mm radials?Nothing.
So either ring it in 2.5 t&e or conduit with 2.5 singles (with 4mm cpcs) radial or conduit with all 4mm radials?Nothing.
As I do not feel qualified to amend the regs myself, or indeed feel confident enough to come to a conclusion on what is clearly an ambiguous section, I would tend to err on the side of caution and use a 4mm single for the cpcOne of the anomolies of the Regs. I'm afraid. Probably be sorted next year with the amendment.
If you used 2.5mm
If you used 2.5mm
Of course.Also doesn't the size of your proposed extra cpc depend on its installation method too?
So if you use a radial doesnt it there need to be 4mm if in conduit or 10mm if clipped direct?Of course.
Yes, if a single conductor is used.So if you use a radial doesnt it there need to be 4mm if in conduit or 10mm if clipped direct?
Sorry, you're quite right it wouldn't require an extra CPC at all.OK then I do not understand what you said above then as when I suggested a 2.5mm ring you said it would need a 1.5mm seperate cpc. Why?
well yes I agree, But it wasn't me what wrote the regs;\So a have-a-go diyers ring with a 16A at one and and in the 40A shower mcb the other wired in 1mm and 4mm?
why exactly are people constantly saying you need a 4mm earth? if you actually read the regulation, you would see that a 4mm is only required on a single protective conductor (ii), and is only one of 5 ways to satisfy 543.7.1.3. there is nothing wrong with having a 2.5/1.5 T&E and an additional earth of 1.5mm from the end back to DBaccording to 543.7.2.1(ii){c}two radial circuits (same size conductors and CPC), each with it's own breaker (same size) with the CPCs connected togetherWet Fish
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