Power to a small garage.

[LeeL]

Which size cable will I need to run into a garage which will be containing a small garage do consisting of 3 double sockets and 2 lights. And what size breaker it will it need to go on ?

 

[Marvo]

Welcome to the forum Lee.

You state in your profile you're an electrician, what qualifications do you have. Is this a design you're doing for a customer

 

[Octopus]

Where is the supply coming from?

 

[GMES]

Lee welcome to the forum, to be honest there are just to many variables to give an answer, we need a lot more info, have you done any of your own calculations.
You will find that if you offer up your thoughts and ideas then the guys will be more willing to assist.

 

[LeeL]

I'm thinking a 6mm from existing fuse board.

 

[Leesparkykent]

How longs the run?..

 

[LeeL]

The supply will be coming from the existing fuse board located inside the house. And then to a junction box outside and then an SWA run from the box into the garage and into a garage DB with a 40a 30Ma RCD WITH A 32a and a 6a breaker

 

[LeeL]

How longs the run?..

About 12 metres inside and then about 10 metres outside

 

[bigspark17]

How long is the run.? What is cable install method? What is the house earthing arrangement? Are there other services in the garage, ie water?

 

[Leesparkykent]

About 12 metres inside and then about 10 metres outside

Anything extraneous in the garage?

 

[LeeL]

Anything extraneous in the garage?

No just going to be sockets and lights plastic

 

[Octopus]

Hum... A bit light on details......

 

[Marvo]

I'm closing this because there's so many variables that would affect the design it's not possible to give accurate answers on a forum without a hell of a lot of info.

Lee, work out the load requirement, apply diversity then design the circuit according to the tables in the regs the same way you would with any circuit. Pay particular attention to the earthing requirements.