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OSG 7.3.2 cables in walls and partitions

hertzal123
In the above,item d states the cables can be protected by earthed steel conduit or,

Item e then states :mechanical protection sufficient to prevent penetration of nails,etc,

but no mention of earthing..

I have a situation with a short 200mm horizontal run outside the zones.

I could slide a lenght of earthed conduit over,but then the earth connection would be plastered

over and could not be inspected.

If I treat the conduit as mechanical protection,it would not need earthing?

Wondered what others would do.

                                                        Regards,Hz

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    gkenyon:

    This advice is based on real cases of such fixings causing things like the metal frame of paroc and similar stud walls to become "live" - in one case, I understand a plumber was electrocuted as the puddle he was trying to fix the leak which caused it was livened up by the metal stud frame!




    I heard that a cable was chafed and made the steelwork live, which wasn't a problem until it all got wet. So then there was a live puddle, which wasn't in itself a problem until the housewife completed the circuit by touching the leaking washing machine.


    But I think that this is a different situation. I reckon about 1/4" of steel plate would do the trick.

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  • 0

    gkenyon:

    This advice is based on real cases of such fixings causing things like the metal frame of paroc and similar stud walls to become "live" - in one case, I understand a plumber was electrocuted as the puddle he was trying to fix the leak which caused it was livened up by the metal stud frame!




    I heard that a cable was chafed and made the steelwork live, which wasn't a problem until it all got wet. So then there was a live puddle, which wasn't in itself a problem until the housewife completed the circuit by touching the leaking washing machine.


    But I think that this is a different situation. I reckon about 1/4" of steel plate would do the trick.

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