Loft Extension Power Requirements

I've got to agree with Danny here. As long as the spur is protected by a 13 amp fuse, you can have as many sockets as you like on the spur. It may be bad design and a dedicated circuit would be a better solution, but the way you have described it meets all regulations. Also forget about 4.0mm cable, once you have a 13amp FCU at the start of the spur, it is totally fine to use 1.5mm cable, as long as Earth Fault Loop Impedence and Voltage Drop are not issues. Brendan Mines Mines Electrical Services

Any circuit powering more than one socket that is not on a ring, i.e. a radial circuit requires a circuit breaker of no more than 20amps, if that is the circuit is run in the correct 2.5mm twin and earth. If a DIY person has installed the circuit they may not of used the correct cable to supply the sockets. I recently had to rewire a similar arrangement of sockets put in after a DIY room partition. They were all wired with 1mm 2 way lighting cable. Best thing to do is get a qualified electrician who is registered with a competent persons scheme such as the NICEIC or ELECSA to take a look for you.

Presuming its a standard 30/32A ring the spur will be fine as long as 1/It has been run in 4mm T+E 2/The total floor area for the circuit does not exceed 100 sq mtrs or the spur itself is protected as a fused spur. The number of socket outlets on a circuit has no limit other than the MCB protecting the circuit as its possible to trip a 32A MCB with just 3 or 4 high load appliances. Multiple outlets are for user convenience not actually expecting to use them all at the same time. In saying this the work you are having done is notifiable and you require a minor works certificate and also a compliance certificate (for the loft extension). Ultimately these are your responsibility so make sure your going to get them and hold back on full payment until you get them. NOTE: I'm guessing both Danny and Brendan both missed the or bit on my post above (or the spur itself is protected as a fused spur). It's only sensible to actually read a post before slating it.

Ignore the other two posts, they're nonsense. If you have a spur off the ring, you're only allowed to have it to one point (such as a double socket) UNLESS it is protected by 13a fuse, in which case, you can spur to as many points as you like. So basically, as long as the first point is a 13a fused spur, you can then take that cable to as many points as you like. In all honesty, the set up you have is probably never going to blow the fuse. Without that fused spur, you're hugely overloading the socket that everything else is being spurred from. Danny