Using sheathing as CPC

L

Leah

I'm completing a job started by another electrician (oh the joy) and the client has all the ordered materials on site as the previous guy instructed them.
One thing I have to do is re route the armored cable between two CU's in a large outbuilding as it presently runs where they are planning to fit an emergency exit, I did a very similar job for another client in an adjacent building and used 3 core armored and only earthed the sheath at one end, now this client has only been instructed to buy 2 core as I'm assuming the previous guy was going to use the sheathing as a CPC, not sure if I'm 100% comfortable with this, any thoughts would be appreciated.
 
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Useful, although the other thread refers to an inspection. The existing cable on this job is 3 core but the problem I have is the the replacement ordered before my time is 2, although am I right in thinking that if it's C3 when found on a new inspection I need to tell the client I'm off to get some 3 core?
 
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Leah said:
Useful, although the other thread refers to an inspection. The existing cable on this job is 3 core but the problem I have is the the replacement ordered before my time is 2, although am I right in thinking that if it's C3 when found on a new inspection I need to tell the client I'm off to get some 3 core?
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Why do you need 3 core?

Have you calculated the size of steel cpc required using the adiabatic equation?
 
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davesparks said:
Why are you not comfortable with using the armour the way it is supposed to be used?
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Yes of course I mean the armour :)

My question might seem a little obvious to you, but not to me, this is why I'm here. I'm qualified and used to do more on site but my main game is event electrics and prop making hence a bit out of the loop.
So are you saying you'd use the armour?
 
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Leah said:
Yes of course I mean the armour :)

My question might seem a little obvious to you, but not to me, this is why I'm here. I'm qualified and used to do more on site but my main game is event electrics and prop making hence a bit out of the loop.
So are you saying you'd use the armour?
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I'm saying I would do the calculation to establish whether it is ok or not if I was unsure.
The adiabatic won't have changed since you were doing this!
 
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no problem with using the armour as cpc. the myth of needing a separate cpc core should be dead and buried by now.
 
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Pete999 said:
The csa of 10mm is 41mm2 the min requirement for tabble 54G is 21.6mm2 so you are well in to use the armour as a cpc
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It may be worth stating here, that the armouring CSA of all SWA cables 2 core to 4 core PVC and XLPE upto 95mm will comply with table 54G as the cables CPC
 
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D Skelton said:
What qualifications have you got? Your profile lists only two bolt on certificates and a building regulation, no actual qualifications??
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What would you prefer to see for the type ofwork I'm doing? I'd be interested to know as thinking of returning tostudy/train in the new year.
 
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Leah said:
What would you prefer to see for the type ofwork I'm doing? I'd be interested to know as thinking of returning tostudy/train in the new year.
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The ones that make you competent to work on any type of fixed wiring up to 1000VAC or 1500VDC. A little clue... The 2382 and 2392 certificates are not them!

Are you evading the question because you don't currently hold any meaningful electrical qualifications yet seem to be trading in my area whilst masquerading as a qualified electrician?
 
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D Skelton said:
The ones that make you competent to work on any type of fixed wiring up to 1000VAC or 1500VDC. A little clue... The 2382 and 2392 certificates are not them!

Are you evading the question because you don't currently hold any meaningful electrical qualifications yet seem to be trading in my area whilst masquerading as a qualified electrician?
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I come on here for advice, if you want to give me something useful in which areas to lean I'm happy to follow that up, as things stand I'm asking (on here and via my regulatory body) when I'm not sure, maybe your qualification campaign would be better directed to those people who never ask and carry on regardless.

As I mentioned if you want to provide some constructive advise on how I could better stand myself in 'your industry' please do let me know as the 'hint' isn't quite getting through.
 
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whar he is trying to say is.

a first year aprentice would know the difference between armour and sheath.

i put blue sheathing over black cable, can i use the blue as the earth?

sheathing is the protective outer layer, in the case of swa it stops the steel rusting, the insulation below the steel keeps the cores electrically seperate so they dont short out.


the 2382 and 2392 are suplementary qualifications.

frankly the 2382 is useless because its open book.


at the moment you shouldn't be installing because you havent got the neccisary qualifications or experience to prove competency, im surprised the scam accepted you as a di without so much as a Electrical Trainee course
 
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shanky887614 said:
whar he is trying to say is.

a first year aprentice would know the difference between armour and sheath.

i put blue sheathing over black cable, can i use the blue as the earth?

sheathing is the protective outer layer, in the case of swa it stops the steel rusting, the insulation below the steel keeps the cores electrically seperate so they dont short out.


the 2382 and 2392 are suplementary qualifications.

frankly the 2382 is useless because its open book.


at the moment you shouldn't be installing because you havent got the neccisary qualifications or experience to prove competency, im surprised the scam accepted you as a di without so much as a Electrical Trainee course
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I see what you are saying but to be honest the sheath armored slip was a colloquialism rather than lack of knowledge as I mentioned I work in events and for some reason armored gets referred to as sheathed in my small world.
I've done the Electrical Trainee but didn't think that mentioning, but will take what you're saying on board, cheers for the explanation.
 
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Leah said:
I see what you are saying but to be honest the sheath armored slip was a colloquialism rather than lack of knowledge as I mentioned I work in events and for some reason armored gets referred to as sheathed in my small world.
I've done the Electrical Trainee but didn't think that mentioning, but will take what you're saying on board, cheers for the explanation.
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I've never heard armoured referred to as sheathed in my life, and I've been working in theatre and outdoor events since before I started my apprenticeship. It has always been called armoured or SWA.
 
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Leah said:
As I mentioned if you want to provide some constructive advise on how I could better stand myself in 'your industry' please do let me know as the 'hint' isn't quite getting through.
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Yes, as it happens, I do have some useful advice for you:

Stop taking money from paying customers to complete jobs you are not competent to do.

The C&G 2357 NVQ level 3 diploma including AM2 is the current route into the industry. This, combined with an apprenticeship scheme where you complete work under supervision, over a three or four year period, would be the minimum required amount of learning to show true competence.

Until that time, I suggest you stop defrauding the paying public by referring to yourself as a qualified electrician. You are no such thing, despite what your 'regulatory body' aka scam scheme might tell you.
 
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Using sheathing as CPC
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