Bidding for job

[bdspark]

Hi
I am currently in the process of bidding for a job. Its an old building that the owner wants to convert into 15 one bedroom self-contained flats. Each room will have a 8.5kw shower, 3kw panel heater, 3kw water heater and a 5kw cooker, plus a few sockets and lights etc. Each flat will have its own C.U inside the flat. But I'm looking for a bit of advice on whether I should use 16mm or 25mm metre tails, and if I should use a 60a or 80a sp&n fuse switch, to power each individual flat from each individual meter.
The furthest length a pair of tails will have to travel is 25m.
Bearing in mind that these are one bedroom flats, and it is highly unlikely someone is stupid enough to have the hob on whilst taking a shower. Will 16mm do?

 

[telectrix]

80A Switch fuse with 16mm tails should be fine as far as ccc is concerned. just calclculate VD before deciding.

 

[Carlosfandango]

Tails..... 25m???

 

[cdavies33]

First of all your tendering for work, no idiot bids for work.... What a world that would be!

 

[chrish_1977]

Thinking you should be factoring sub mains in too

 

[bdspark]

Thanks guys for your reply's
Although a bit more info on my questions would help.

Thinking you should be factoring sub mains in too

The property will need a new supply, since the current supply is a single phase 80a supply.

 

[guinnessgixer]

I've done that on some apartments, bemco unit to meters, you'll have to put all the 100mm trunking in place for that with the earth cables in place to your 80a switched units, we then run 16mm 3 core swa to each apartment, terminated by gland to a box with a Henley block in, 16mm tails to your consumer unit,

 

[bdspark]

Are you saying I should use SWA instead of meter tails?
Also can you explain the Henley block? Is it not better to put the SWA directly into the C.U

 

[guinnessgixer]

yea defo use swa instead of meter tails, that way its protected and earthed, 16mm swa is pretty stiff stuff so not very good to gland straight to flimsy plastic consumer unit, and the glands are quite wide so not a lot of meat left around it if you did?