Re: Consumer Unit Wiring with sub-units?

["Raymond Kelly" <raymondtkelly@xxxxxxxxx>]

Hi Des,
Freaky timing. I'm having a single Sub main fitted this weekend with a 10mm
40A feed from the main CU. Sub main will feed 4 X 12 CBus relay units.
I don't have details of the busbar arrangment - I'll ask him in the next
day
or two to hand but the CU is a MK K5681s

Whats the wisdom for the 'seperate earth feed'


On 04/12/06, Des Gibbons <des@xxxxxxx> wrote:
>
>   Hi,
>
> I just want to check with the wisdom of the group before I get the
Sparkie
> in.
>
> I am putting a new consumer unit in under the stairs, I also have 2
> sub-consumer units, one in the attic, and one in the garage, both to
feed
> c-bus units and other bits and pieces.
>
> The 2 sub-units are fed from the main consumer unit with 10mm^2
T&E with a
> separate 10mm^2 Earth feed as advised by Rob Mouser.
>
> Now my concern is, should I be fitting double pole MCB's in the main
> consumer unit for these 2 sub-feeds, and if so, can you use a busbar
to
> feed
> the live on the double pole MCB's or will they need to be wired
separate
> from the busbar for the live as well as the neutral?
>
> If any one has any advice, I would much appreciate it.
>
> Cheers, Des.
>
>
>


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