70mm stud

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Is it a requirement that wiring is to be in steel conduit in a 70mm stud wall.
The wiring will be protected by an MCB and Main RCCB
 
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Steel no. It may be required to have cables or conduit with is in the list. BS 5467, BS 6346. BS 6724, BS 7846, BS EN 60702-1 or BS 8436. Not got the latest BS 7671 there may be more.

But it does depend "A cable concealed in a wall or partition the internal construction of which includes metallic part, other than metallic fixings such as nails, screws and the like, shall:" and the list starts.

As said stud means nothing what you need is to consider does it include metallic parts as above.
 
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Right, so the condit would be more for the safety of making the wall "Live" if wiring became damaged and touched the construction material (which in this case is metal). Make sense.

Any holes through the studs will be grommeted to prevent slicing of the cable, Or I could just come vertically down between the studs as there are only 2 sockets being fitted on a radial.
 
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I assume I can run standard T&E up to where it enters the stud wall, then us a 17th edition junction box to connect to the armoured cable that will run through the wall??

There is a suspended ceiling so I plan to run the cables from the CU on cable trays to above the wall, then drop down in to the wall cavity and run through as needed.
 
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I assume I can run standard T&E up to where it enters the stud wall, then us a 17th edition junction box to connect to the armoured cable that will run through the wall??

There is a suspended ceiling so I plan to run the cables from the CU on cable trays to above the wall, then drop down in to the wall cavity and run through as needed.

Metal studding is used in new houses, I can't imagine that housebashers run armoured cables in new builds?? Or faff about with MF junction boxes etc etc.

Do you not just run T+E in the appropriate safe zones with RCD protection, and grommets for mechanical protection.
 
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Metal studding is used in new houses, I can't imagine that housebashers run armoured cables in new builds?? Or faff about with MF junction boxes etc etc. ... Do you not just run T+E in the appropriate safe zones with RCD protection, and grommets for mechanical protection.
Indeed, I think some of the discussion is probably a bit misleading. AIUI, in a wall with metallic parts, 'bare' T+E is acceptable if it is RCD protected [522.6.203(i)] and, if it is less than 50mm deep (probably inevitable with a 70cm wall, unless plasterboard is very thick), is run in safe zones [522.6.202, referenced from 522.6.203]. Only if those two conditions are not satisfied does one have to 'faff about' with armoured cable, earthed conduit or whatever - at least, as far as satisfying the regs is concerned.

Kind Regards, John
 
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perfect, thank you

I should have mentioned, does this still apply in commerical? Its just a reception partition wall.

On other thing as well, will vertical run from top of stud wall down to socket level still be within safe zones??
 
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perfect, thank you ... I should have mentioned, does this still apply in commerical? Its just a reception partition wall.
I would have thought so, as far as regs (BS7671) are concerned - but I imagine that, for all sorts of reasons, work in commercial premises needs to be undertaken by qualified electricians.
On other thing as well, will vertical run from top of stud wall down to socket level still be within safe zones??
Yes, provided it remains vertically aligned (i.e. within the width of) the socket throughout it's length - although, unless the cable to attached to something, it can be difficult to be sure that is the case!

Kind Regards, John
 
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I should have mentioned, does this still apply in commerical? Its just a reception partition wall.
Err....

Who is doing this work, in a commercial environment, with all that means in terms of EAWR, public and employer liability issues, buildings insurance and lease Ts'n'Cs etc?
 
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Err.... Who is doing this work, in a commercial environment, with all that means in terms of EAWR, public and employer liability issues, buildings insurance and lease Ts'n'Cs etc?
Quite ... which is why I wrote...
... but I imagine that, for all sorts of reasons, work in commercial premises needs to be undertaken by qualified electricians.

Kind Regards, John
 
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Im going to be carry out the work myself

and based on 17th edition and the recommendations here (thank you for), Im going to run SWA through grommeted holes in the metal studs.
 
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Im going to be carry out the work myself.
I strongly urge you to reconsider.

You do not seem to be sufficiently skilled to discharge your duties under H&S legislation, particularly EAWR.

Have you checked the small print in your employer and/or public liability insurances to see if they will become invalid if unqualified people do electrical work?

Ditto buildings and any plant/equipment/etc insurances?

Have you checked the small print of the lease agreement to see if the landlord is happy with unqualified people doing electrical work?
 
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SWA and joint boxes etc is a right lash up and will not be compliant anyway.

T&E in kopex would be my preferred method.
 
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