Supplemental earth bonding


Postby brucephipps » Sun Dec 30, 2007 6:14 pm

Hi

Could anyone tell me - should supplemental earth bonding be routed back to the earth bus bar in the consumer unit? The reason I ask is because I recently had to take the side panel off my bath to fix to a leaky pipe, and decided to check the earth bonding in the process.

All hot & cold taps for the bath & basin are joined by a 4mm2 cable, but the end of it, is wired into the earth terminal of the light fitting. This is a much smaller conductor (1.5mm2?) and I couldn't help wondering if this was ok, especially with the cable lengths involved.

From my bathroom, a 4m cable would reach from the basin to the consumer unit. As it is, I suspect the overall length of the earth conductor will be much longer than this, given that the lighting circuit will be a radial configuration.

Any advice would be much appreciated.

Many thanks
Bruce
brucephipps
Rank: Apprentice
Progress to next rank:
36.8%
Posts: 12
Joined: Sun Nov 25, 2007 11:08 pm

Sponsor

Simply Build It

Postby kuzz » Mon Dec 31, 2007 11:17 am

Equipotantiol bonding Is between Your main earth terminal & Your services (Water/Gas).
Suplementary bonding in your bathroom should be between all circuits, hot and cold. so it sounds correct.
However I think they are going to sack off the bathroom bonding in the new edition of the regulations. Something i'm glad of with plastic pipe and fittings becoming more & more popular.
kuzz
Rank: Ganger
Progress to next rank:
56%
Posts: 134
Joined: Sat Nov 03, 2007 3:37 pm

Postby kbrownie » Mon Dec 31, 2007 4:09 pm

Hi brucephipps, as Kuzz has mentioned installation okay. It's supplementary bonding so no need to go back to CU. The light fitting is most probally outside the zones so may not need it anyway, I'd expect electric showers, heaters, shaver sockets to be supplementary bonded though, if you have them!
KB
kbrownie
Rank: Project Manager
Posts: 1993
Joined: Mon Mar 05, 2007 9:36 pm

Postby brucephipps » Wed Jan 02, 2008 10:56 pm

Thanks Kuzz & KBrownie. Much appreciated.
brucephipps
Rank: Apprentice
Progress to next rank:
36.8%
Posts: 12
Joined: Sun Nov 25, 2007 11:08 pm

Display posts from previous
Sort by
Order by



  • DIY How to Project Guides

  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!



 


  • Related Topics