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Topic Title: TT Earth spider
Topic Summary: Is it ok.
Created On: 04 February 2013 05:51 PM
Status: Post and Reply
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 04 February 2013 05:51 PM
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mikejumper

Posts: 1797
Joined: 14 December 2006

I came across a house last week with a TT earth where the earth rod was used as an MET.
Main earth, gas and water bonding all spidered onto the top of the rod, and all in 16mm.
It's unusual, but is there anything wrong with doing it this way.

I think it may have been done this way because the CU was on the first floor and the location of the earth rod was very close to both gas and water supply.
 04 February 2013 05:59 PM
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MrOther

Posts: 539
Joined: 08 June 2010

Personally, if can be altered to a more conventional method then I would change it, but as long test permit, connections are sound, then in theory there is nothing wrong with other then not complying.

But I would listen to older, wiser heads.
 04 February 2013 06:27 PM
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ennisteve

Posts: 10
Joined: 10 December 2012

As Mr Other says its unconventional, however, providng the Ze is good then when the rod is tested by its self, and providng the installation has adequate RCD protection at the mainswitch it. Bit curious as why 16mm has been used though?
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