Ask The Trades - Earthing?

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Ask The Trades › DIY Forum › Electrical Questions › Earthing?

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Earthing? (Read 7072 times)

Lectrician Administrator Trade Member Author Offline Ask The Trades Posts: 8815 Total Thanks: 109 For This Post: 0 Braunton, North Devon United Kingdom Gender: Trade: Electrician	Earthing? May 3^rd, 2012, 7:11pm Extending a ring final circuit in a butchery and noticed a slight issue that would have been present from the day the site opened! Going by the flex entry into the back box I would say the scales installers are to blame for this one!
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The_Trician Trade Member Offline Posts: 7721 Total Thanks: 8 For This Post: 0 Gender: Trade: Electrician	Re: Earthing? Reply #1 - May 4^th, 2012, 1:39pm I take it you mean the lack of cpc connection to the front plate? Or is it because the enclosure is all plastic? Can't tell if it's painted steel or not from the pic.
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Lectrician Administrator Trade Member Author Offline Ask The Trades Posts: 8815 Total Thanks: 109 For This Post: 0 Braunton, North Devon United Kingdom Gender: Trade: Electrician	Re: Earthing? Reply #2 - May 4^th, 2012, 4:37pm It's a typical MK masterseal moulded plastic enclosure. The two earth terminals are NOT linked! One is marked as EARTH the other as LOOP, in reality you use either for the earth, but not quite like that!
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scotspark Trade Member Offline mmmmm it's gonna cost you!! Posts: 3074 Total Thanks: 10 For This Post: 0 scotland Scotland Gender: Trade: Electrician	Re: Earthing? Reply #3 - May 6^th, 2012, 1:13pm seen that before had a spark from another firm giving us a hand on a job and he fitted 6 MK masterseal twin sockets with 1 earth into socket frontplate and one into backbox with no link!!!! never had him again
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Lectrician

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Re: Earthing?
Reply #4 - May 6^th, 2012, 3:02pm

I can remember taking a surface moulded socket apart looking for a fault and noticed an earth flylead from the socket to the back box screw of the plastic box! Each socket I came to had one.

It was an install done by a maintenance guy in a small independant school, all MMT2 trunking drops from ceiling down to new sockets for the interactive whiteboards.

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LSpark Global Moderator Trade Member Author Offline Posts: 8069 Total Thanks: 3 For This Post: 0 London, UK United Kingdom Gender: Trade: Electrician	Re: Earthing? Reply #5 - May 7^th, 2012, 1:10pm It's amazing the lack of thought shown isn't it, perhaps this is a good example of why inspection & testing is so important! Or perhaps it's just to many of the wrong people doing the job!
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The_Trician Trade Member Offline Posts: 7721 Total Thanks: 8 For This Post: 0 Gender: Trade: Electrician	Re: Earthing? Reply #6 - May 7^th, 2012, 10:16pm I had 3 metalclad 20A DP switches last week where there was no flying lead to the front switch plate, nor any banjos fitted to the SWA glands - Done by a NIC Approved Contractor too. Despite the cable being a 3 core with 1 x core used as a cpc too!
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