Service point in out building

[Frisky182]

Hi there.
My friend is building a new house. He has decided to put service point in and out building next to new house. A duct has been run from out building to house. I will be using 16mm three core to supply house db. I've decided to use rcbo's for circuits in the house. But I am unsure if the cable at the out building side should be rcd after the cut off to supply the house? Any advice would be appreciated.

 

[Andy78]

Are you an electrician or is this a DIY job ?

 

[Rockingit]

Two things:

1) Check your calculations for voltage drop for the lighting - you might need to upgrade that 16mm to a 25mm depending on length of run
2) It would probably pay you to bring the incomer into a metal-clad consumer unit anyway as that way you have something to make your armoured off to and also can run some ancillary sockets and lights in the outhouse more easily.

No, you don't need to provide upstream RCD protection to the cable, but personally I would install it onto a DP MCB rather than a single.

 

[HandySparks]

What is the earthing arrangement for this new installation?

 

[ChrisElectrical88]

Lengh of run and more info required please? As said by the post above a metal clad board would be best. If your using RCBO's i would go for Schneider, good price and very good board.

 

[Frisky182]

It's a 20m run. And a TN-S system. It a three bedroom 1 and half storey house.

 

[Frisky182]

Thanks for reply. It's a 20m run. In a one and half storey three bed house.

 

[Octopus]

and no answer if its a DIY or sparky doing it.........so its another DIY job

 

[telectrix]

1 and 1/2 storeys? must be DIY as he's already demolished half the upstairs. :drool5:

 

[ian.settle1]

1 and 1/2 storeys? must be DIY as he's already demolished half the upstairs. :drool5:

Or it's already half sunk into the ground

 

[GLENNSPARK]

come on frisky....own up..

 

[Frisky182]

The half storey is built in the roof space with dormers!!!

 

[Frisky182]

No it not DIY. I'm just asking for some advice as I'm not long qualified and just needed some advice. Thanks for the actual genuine advice on this.

 

[GLENNSPARK]

go for an armoured sub....

this does not need RCD...
then RCD for finals (in this outbuilding)...

think RCDs in series..

 

[Guest55]

The half storey is built in the roof space with dormers!!!

sounds like some sort of hobbit hole..........




what the hell are you building over there ? lol.

;-)