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Discuss 18th edition consumer unit in the Electrical Forum area at ElectriciansForums.net

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Hey all,

I have just finished a rewire of a 1 bed house and just have the board left to install. I am a qualified sparky but now work as a project manger so haven’t carried out much domestic work in the last couple of years. I know that the requirements for installing consumer units has now changed and am wondering what are the requirements with regard to cable entries into the board. I have the cables all dropping down from the ceiling where the existing board and meter position is in the entrance hall. Any advice would be appreciated.
 
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Dave OCD

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Mentor
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My preferred method is to bring all cables through the large rear knockout, suitably grommeted of course. And I generally space the board off a little with a couple of pieces of small batten the same height as the board to facilitate this. If you use the top knockouts you then need several glands to achieve the required IP rating and it doesn't look as good either.
 

buzzlightyear

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ip rated on top open grommets sealed with fire seal ,if you cannot get the cables behind
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Charlie_

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Arms
1 bed house, how many circuits?
Maybe 5?
I prefer the rear entry method (no pun intended)
Failing that, I would use trunking
 

Charlie_

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Arms
My question on earthing;
TT - upfront RCD or going for the option of having the tails enter the board with one of those special stuffers that apparently guarantee the board from becoming live.

Day off;.. we’ve all had one of those today in the iom, it’s a national holiday :)
 
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Deleted member 26818

Top horizontal surface of the board has to be IP4X or IPXXD, the front sides and bottom surfaces have to be IP2X or IPXXB.
 
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Thanks for all the replies guys! It’s a T-N-CS earthing arrangement. As the board is going to be tight to the ceiling there won’t be room for trunking so may do the rear entry method. This is a photo of the old board being replaced.
 

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Thanks for all the replies guys! It’s a T-N-CS earthing arrangement. As the board is going to be tight to the ceiling there won’t be room for trunking so may do the rear entry method. This is a photo of the old board being replaced.

I don’t believe that head was that close to the ceiling when it was installed ...
 

littlespark

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Advent Win
Not strictly needed, but I would bring the board down the wall a bit to a more user friendly height. With trunking to hide cables.
 
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