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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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    Unless earthed, and suitable to act as a protective conductor, the mechanical protection needs to withstand penetration by nails and screws.


    These days, we usually advise this means "nail gun" and "tek screws" - so, you're really looking at very thick plate steel or similar to achieve that requirement.


    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!
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  • 0
    Unless earthed, and suitable to act as a protective conductor, the mechanical protection needs to withstand penetration by nails and screws.


    These days, we usually advise this means "nail gun" and "tek screws" - so, you're really looking at very thick plate steel or similar to achieve that requirement.


    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!
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