UK Diversity

[Mfctitch]

Morning Nearly said lads then thought better of it so morning everyone.

I've got to price for another shed job, I know you're thinking "so"

But question, as we have established with my previous threads I tend to go over board but this time I need some advice on diversity
For a change I know that there will be
at least
2 number 3Kw panel heaters
A radial circuit
A lighting circuit
A 10.5 Kw shower

This gives me 38.5 Kw over a 44 metre distance with at least 2 metres going under ground.
so I need to bring that figure down, I've watched the john Ward clip on cookers but can I use more diversity on the other circuits. I happy for you to point me in the right direction in the book if that would help.

One other question there anyway round the this calculation on going underground as the cable is only under the ground for two metres but it makes a big difference

Thanks

 

[pc1966]

Would it? Fed from one supply and on the same meter I would class as one installation.

That is a valid way to look at it.

In the regs it just defines an installation as "An assembly of associated electrical equipment having co-ordinated characteristics to fulfil specific purposes" and my thought was a building with its own DB (i.e. coordinated set of circuits) would then require a safe point of isolation. More so when it is more-or-less a self-contained living quarters like this case (than say a garage with a couple of sockets and a light bulb).

 

[Mfctitch]

Would it? Fed from one supply and on the same meter I would class as one installation.

Not sure if I've confused matters but the supply for the "shed" will be 3 core SWA only one live this will be fed via a fused isolation switch in the house with a consumer unit in the "shed"