Using CPC as live conductor.... ok i know, but...

[uksparks]

Hi,

Had to change a bathroom fan at the weekend for someone and they wanted it to be on a timer, but couldnt as the cable was buried in the wall and wouldn't move etc..

the cable that fed it was a three core flex, I the earth was not being used anyway due to the load on the end etc.

I know you are not meant to use the CPC as a live conductor, but if its flex and the same CSA and you were to correctly identify it with brown etc, would it have then been acceptable?

I didn't do it, but it made me think, oh i so could have used it, but it just seemed wrong. I can understand why you wouldn't do it in twin and earth, but surely where its flex or all conductors are the same CSA and have their own sheathing on them inside the outer, would it have been acceptable or not?

I am going to say not on the basis CPC is CPC and nothing else, any thoughts would been welcomed.

 

[Simonslimline]

I am pretty sure the NIC mentioned this a while ago and said you can. They do seem to make it up as they see fit though.

Also i am fairly sure that you should not bury flex in a wall!

 

[Plonker 3]

Reg 514.4.2 says no you cant do that.

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I am pretty sure the NIC mentioned this a while ago and said you can. They do seem to make it up as they see fit though.

So what do the NIC know about anything, you do know they dont write the regs dont you?

 

[Pete999]

It's not up to the NICEIC it's a regulation they don't make the regulations

 

[Simonslimline]

Yes i am aware of that... i was simply mentioning what i had read

Reg 514.4.2 says no you cant do that.

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So what do the NIC know about anything, you do know they dont write the regs dont you?

 

[Plonker 3]

Simonslimline and uksparks feel to buy a copy of this book and read it sometime rather than listen to the NIC or any other CPS.



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Yes i am aware of that... i was simply mentioning what i had read

I read in the beano you can fall along way off a high cliff and walk away unhurt, does it make it true?

 

[DPG]

I am pretty sure the NIC mentioned this a while ago and said you can. They do seem to make it up as they see fit though.

Also i am fairly sure that you should not bury flex in a wall!

Is there a specific reg for this??? Daz

 

[Darkwood]

Check your regulations under cable Identy 514.4.2

Theoretically yes its just a colour but a big no no for various reasons.

 

[Silly Sausage]

Also, last sentence of 411.3.1.1

 

[Plonker 3]

Also i am fairly sure that you should not bury flex in a wall!

Do you own a copy of the regs?

 

[Simonslimline]

I am trainee and do own BS7671, if you read my post it does say that the NIC make it up as they see fit. I mentioned it only as i remember reading about it a while back.

Simonslimline and uksparks feel to buy a copy of this book and read it sometime rather than listen to the NIC or any other CPS.

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I read in the beano you can fall along way off a high cliff and walk away unhurt, does it make it true?

 

[telectrix]

as long as the fan was classII and there was no alternative, i might be tempted.

 

[Plonker 3]

I am trainee and do own BS7671, if you read my post it does say that the NIC make it up as they see fit. I mentioned it only as i remember reading about it a while back.

Well then you need to read it, threads like this will help you understand it more. Only say something you have read by providing a link to it to prove your point.

 

[Hawkmoon]

I remember a story going round a while back (90s) about a plumber who cut into an existing boiler wiring flex that had cpc as live - can't remember details but he connected the cpc to earth term somewhere in his jb and result was fatal shock for homeowner off the kitchen sink.

 

[Simonslimline]

yep fair enough, i cant find the article link but found this on a forum page......

Well then you need to read it, threads like this will help you understand it more. Only say something you have read by providing a link to it to prove your point.