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    Help please with twin and earth wiring.

    I want to put 2.5 twin and earth in the wall and I am plastering over it, do I need to put the twin and earth in trunking first?

    Many thanks for any help.

    15 Comments

    You need to buy some plastic capping :thumbsup:

    http://www.tlc-direct.co.uk/Images/Products/size_3/MTCAP12.JPG

    Original Poster

    Thank you very much, back to b&q then. lol

    Repped for your help. thanks again.

    transit;8432062

    You need to buy some plastic capping :thumbsup:



    I never did. Not like its going to stop a nail etc is it?

    JAYKAY72;8432145

    Thank you very much, back to b&q then. lol Repped for your help. thanks … Thank you very much, back to b&q then. lol Repped for your help. thanks again.



    No problem :thumbsup:

    Shengis;8432160

    I never did. Not like its going to stop a nail etc is it?



    Believe it or not the pvc capping will divert quite a few nails and remember its a legal requirement to protect all 230v cables :thumbsup:

    transit;8432173

    Believe it or not the pvc capping will divert quite a few nails and … Believe it or not the pvc capping will divert quite a few nails and remember its a legal requirement to protect all 230v cables :thumbsup:



    They'll be protected by the plaster :lol:

    Under the new wiring regs you have to have 30mA RCD protection on the circuit if it is buried less than 50mm, if you do not have RCD protection then you must use metal capping to protect the cables.

    Original Poster

    awarner;8432244

    Under the new wiring regs you have to have 30mA RCD protection on the … Under the new wiring regs you have to have 30mA RCD protection on the circuit if it is buried less than 50mm, if you do not have RCD protection then you must use metal capping to protect the cables.



    I have rcd protection on my fuse box. :thumbsup:

    A metal capping will do nothing to stop modern power tools which will hapily drill through it like butter. There are two reasons for capping. Firstly to minimise the long term effects of chemicals in the plaster reacting with the cable and secondly, to provide an albeit small air space around the cable which will improve the thermal characteristics of the cable.

    I would put it in trunking several times larger than the wire itself just so that you can get to it again if there are problems later on.
    I've recently bought a new house and the power supply to the summer house has just this week failed.
    The cable goes underground but is not in any trunking and also goes underneath the conservatory, so I have no hope in pulling through a new cable.
    I'm basically shafted 'cos the person before me didn't have the foresight of putting the cable in some form of trunking. :x

    Jumpingphil;8433376

    I've recently bought a new house and the power supply to the summer house … I've recently bought a new house and the power supply to the summer house has just this week failed.The cable goes underground but is not in any trunking and also goes underneath the conservatory, so I have no hope in pulling through a new cable.I'm basically shafted 'cos the person before me didn't have the foresight of putting the cable in some form of trunking. :x



    Check the mcb , it would of been an amoured cable and unless youve put a spade clean through it, it wont just "fail" :thumbsup:

    Also the cable should of been installed in ducting and not trunking.

    Banned

    Brilliant.

    Ask some fat nerds on a shopping website for mains wiring advice!

    Dude! Beware!!

    DJ1;8439157

    Brilliant. Ask some fat nerds on a shopping website for mains wiring … Brilliant. Ask some fat nerds on a shopping website for mains wiring advice!Dude! Beware!!



    Yeah but some of us are qualified to answer

    transit;8439102

    Check the mcb , it would of been an amoured cable and unless youve put a … Check the mcb , it would of been an amoured cable and unless youve put a spade clean through it, it wont just "fail" :thumbsup:Also the cable should of been installed in ducting and not trunking.




    I know what it should have been put in.
    But should have, and actually are two different things.
    There is power right up to the switch, and the switch works.
    Just after the switch, the wire disappears under the conservatory and reappears out near the summer house.
    There is no armoured cable and where the cable appears from underneath the patio it is intact right up to the junction box in the summer house.
    Somewhere between the switch and the summer house it has failed.
    For all I know, there might be a plug and socket connection underneath the conservatory, or even two bits of wire twisted together. :w00t:
    I have no way of knowing.
    Probably best safer in the long run if I lay a new cable anyway. :thumbsup:
    I'm going to have to lay a new cable and go via a completely different route. :x
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