power supply to shed

iceman · Oct 19, 2009

hello chaps i just been to quote a job supplying electrics to shed, i suggested running 4mm swa radial via single socket outlet in the lounge, in the shed he'll be using 100watt luminare, oils filled around 800 watt heater, and a radio and speakers, my only concern was all the sockets in the house come off one 32A breaker , thinkin about it now with the extra power the sheds pullin it my over load the circuit, your thoughts would be great cheers

Mac · Oct 19, 2009

Is there no way of running a supply straight off the CU.The shed would be drawing just under 5A if all on.How far is the shed from the house.

paulrayner · Oct 19, 2009

is there enough room for a henly block & an add on CU next to existing CU? It wouldn't cost that much more.

The Truth · Oct 19, 2009

for shed power a 13 amp supply fed from fused spur off the ring main wired in 2.5 mm2 SWA is more than ample.

assume you have 30mA RCD protection covering the ring circuit already? if not use an RCD spur next to the socket your taking power from. that combo is good for a 50 metre run.

iceman · Oct 19, 2009

the run is only about 3metre long. i was going to connet the the 4mm swa cable to ip 56 jb then and the same at the shed thn use eather a switch spur inside the shed or use a 2way c/u cant realy see the point in this tho as the shed isnt realy pullin to much power

The Truth · Oct 19, 2009

exactly so use 2.5 swa straight into the shed socket ( forget the IP box at shed end ) and connect a spur off that shed socket to control / protect the lighting with a 5 amp fuse. Job done. there really is no point putting in consumer units and separate circuits back to the house for this job...as you say its a shed 3 metres from the house drawing 5 amps max!