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Borrowing a cpc from another cct for lighting cct coded C2 in PE magazine codebreakers.

hertzal123 over 3 years ago

Just read in the above February mag the sparks has borrowed the cpc

from another cable in the process of changing a kitchen into a utility room.,because the

lighting cct had no cpc.

Thought this was allowed under 543.1.2 if the borrowed cpc was of adequate size?

The article states"the 2 circuits are no longer seperate or individually isolatable,as they are

now linked".

Regards,

Hz

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0 OlympusMons over 3 years ago

The article quotes regs 134.1.1 "good workmanship", "proper materials" and "manufacturers' instructions" so i don't see the relevance of that, and 314.4 "... The wiring of each final circuit shall be electrically separate from that of every other final circuit, so as to prevent the indirect energizing of a final circuit intended to be isolated". So the potential danger is working on something live which you believe to be isolated, and just means the live conductors, surely not the CPC.

Also you are allowed to share CPCs in 543.7.2.201(c) between two identical circuits having high protective conductor currents
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0 OlympusMons over 3 years ago

The article quotes regs 134.1.1 "good workmanship", "proper materials" and "manufacturers' instructions" so i don't see the relevance of that, and 314.4 "... The wiring of each final circuit shall be electrically separate from that of every other final circuit, so as to prevent the indirect energizing of a final circuit intended to be isolated". So the potential danger is working on something live which you believe to be isolated, and just means the live conductors, surely not the CPC.

Also you are allowed to share CPCs in 543.7.2.201(c) between two identical circuits having high protective conductor currents
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