Wiring for garden office - can I spur off an external socket?

[mattg4321]

That socket having ‘it’s own wire from the fusebox’ is a good sign if true. It all depends what size it is though as to how much power it can take!

 

[brianmoooore]

If there is a breaker in the CU (fusebox) that is labeled outside socket only, and this is true, then you can go on from it to your studio. Not even a fused spur is required, as long as the cable to the studio is of an adequate size for the rating of the breaker.
This would be fine if you were building a small garden shed, but I still say you'll eventually regret it if you don't give this place its own largish dedicated feed.
What is the rating of the breaker? (likely B16, B20 etc.)

 

[Spoon]

The external socket has its own wire from the fuse box if that means anything?

As above, things are looking better if this is true.
As above, see what size breaker it is wired to.

 

[Dustydazzler]

For the sake of a few hundred quid , I would buy some 4mm swa and put in a dedicated 30a supply

you are spending thousands on a nice outbuilding , why skimp now

 

[brianmoooore]

For the sake of a few hundred quid , I would buy some 4mm swa and put in a dedicated 30a supply

you are spending thousands on a nice outbuilding , why skimp now

Costs little more to stick in 10mm2 or 16mm2. I wouldn't bother with 4mm2

 

[Spoon]

For the sake of a few hundred quid , I would buy some 4mm swa and put in a dedicated 30a supply

you are spending thousands on a nice outbuilding , why skimp now

The outside socket might be wired in 4mm... We may find out...

 

[Spoon]

Costs little more to stick in 10mm2 or 16mm2. I wouldn't bother with 4mm2

32A should be enough for a small office.. 4mm should be enough.

 

[brianmoooore]

How about the hot tub/sauna?

 

[Dustydazzler]

i like working with 4mm swa and 30amos is plenty for most domestics

10-16mm is overkill for domestic office power

 

[brianmoooore]

i like working with 4mm swa and 30amos is plenty for most domestics

10-16mm is overkill for domestic office power

There's the cable length to consider as well.