Cable Size To Summer house

Paul reid · May 25, 2021

Hi

I'm going to look at connecting up a summer house tomorrow which the customer says he has run a 10mm 3 core armoured to underground (length of run is 25m). In the summer house there is going to be a 20a radial feeding 2 x double sockets and 3 x single sockets, a 6A circuit feeding 23 x Downlights with 5w led lamps and a supply to a hot tub which I am presuming requires a 32A supply but won't know until tomorrow.

If this is the case, am I correct in thinking that 10mm 3 core armoured is big enough?

Sockets = 20A (rated current of circuit breaker)

Lights = 23 x 100w (2300w) or in reality 23 x 5w (115w)

Hot Tub = 32A (assumed circuit size)

Total load = 62A / 52.5A

Supply is PME so will be TT at summer house.

Thanks.

Murdoch · May 25, 2021

Have you given price to the client to do this?

Paul reid · May 25, 2021

Murdoch said:
Have you given price to the client to do this?

No, just going to have a look tomorrow so i can give them a quote.

Murdoch · May 25, 2021

Paul reid said:
No, just going to have a look tomorrow so i can give them a quote.

ok. So you need to confirm all the salient details then do some calculations on the maximum load AND then state this on your estimate / quote

kerching · May 26, 2021

AND even if the cable does calculate as being suitable put n your quote that you cannot accept responsibility/warranty for the submain as you didn't install it!

youll thank me later