is it dangerous to use the cpc in a twin / earth cable? I know it's not safe in case someone else thinks it's still an earth but is that the only reason?
Discuss Using cpc as neutral in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
Might not be the same csa as the Phase conductor, not insulated over the entire length, what are you using as the cpc if you bodge the job by using it as the N, IT'S WRONG and against the Regulations, nothing else springs to mind other than it's Muppetry to do it.is it dangerous to use the cpc in a twin / earth cable? I know it's not safe in case someone else thinks it's still an earth but is that the only reason?
A bad joke at that.This has to be a joke
Commonly these are from a new member with a blocked profile .
Commonly these are from a new member with a blocked profile .
Cpc has to be present at every termination but in fact you can get it from wherever you like.Well .......... each cable should have a continuous CPC from the CU - can't remember the reg no.
Why is the profile blocked? has he something to hide? very odd.Commonly these are from a new member with a blocked profile .
Same applies to any conductor that isn't identified correctly but that would show up pretty quickly in testing. The main issue is the lack of insulation and the requirement to get an earth to every termination.is it dangerous to use the cpc in a twin / earth cable? I know it's not safe in case someone else thinks it's still an earth but is that the only reason?
Hi - not to joust, but not a good idea imho and may be prohibited by 514.4.2 .You can even oversleeve a green and yellow insulated core with brown in a multi core cable and that still complies with the regs
Agree it's a terrible idea when designing from scratchs but i don't agree it's dangerous and it would be picked up straight away by anyone working on the circuit.Hi - not to joust, but not a good idea imho and may be prohibited by 514.4.2 .
Cpc has to be present at every termination but in fact you can get it from wherever you like.
You can even oversleeve a green and yellow insulated core with brown in a multi core cable and that still complies with the regs. But you'd only do that if you were struggling to avoid a lot of redecorating!
The bare cpc is not insulated that would be your main problem.
MODs... Is this 'blocked profile' a glitch as the last member who had this said they hadn't changed anything?
No offence, unfortunately i can't do any more detailed explanation at that point! But i was addressing a part of your post not your usual excellent standards!So you've given me a disagree ............ hum
Reading the OP between the lines I imagine he wants to use the CPC as SL or similar .............. hence my reply.
Can't really what there is to discus John, you shouldn't use the cpc as a live conductor under any circumstances.No offence, unfortunately i can't do any more detailed explanation at that point! But i was addressing a part of your post not your usual excellent standards!
I do think that when people are asking this kind of question, we should be precise about why it's not allowed, and appeal to both the regs and to common sense specifically where appropriate.i think a lot of things that are uncommon in domestic are actually within the regs, and sometimes the boundary between what is allowed and what isn't seems to defy common sense, but as long as we discuss properly we will help everyone to learn something new.
Shouldn't according to what reason though? My point is try to be specific. If this was an eicr you can't just code things because it's not common practice.Can't really what there is to discus John, you shouldn't use the cpc as a live conductor under any circumstances.
So what would you use as the cpc in your scenario? and can you say which Regulation says that doing what you suggest complies with BS7671.In a t&e yes as i said because of the lack of insulation, however under the regs you can identify the green and yellow insulated conductor in a multi core cable as neutral or line by over sleeving.
Making sweeping statements about how you shouldn't do it isn't really helping anyone to learn something.
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