right, here goes! im going to be running power to a shed in the next few months. In the existing shed, there is a scratty old piece of 2.5mm t+e, run under the paving slabs to the house 20A MCB. This supplies tumble dryer, occasional lawnmower, radio, small 11w light. No RCD.
Getting new shed, therefore new electrics.
shed is approx. 15m from house. we are getting a new split load CU under the stairs, so the house end will be up to date. I reckon we will need about 25m of cable to supply the shed. We need to supply fridge, freezer, and tumble dryer, as well as garden appliances. I know outdoor electrics need RCD protection, but with a fridge and freezer etc, how would we do this without nuisance tripping?
Here is my plan:
32A MCB at house CU (on non-RCD side)
4mm T+E to outside wall of house
then IP65 box to 4mm 3C SWA (all done in appropriate glands)
approx. 20m of SWA to shed
then terminate SWA in new consumer unit.
in new consumer unit: 63A incomer, 20A MCB to fridge and freezer (2.5mmt+e), 20A MCB to tumble dryer, 20A RCBO to socket for outdoor power, 5A MCB for shed lights (2 fluorescent tubes).
You guys think ive got this right? i mean, fridge and freezer only consume, say, 200w each, if that, and they hardly consume anything in winter! (allowing for starting current with 20A MCB) The tumble dryer (2500w) probably gets 1-2 hours use on average each day, not in summer though.
any comments appreciated. Cheers.
ps. i know all about part pee, lets not have any debates here. i know i am competent enough to do this work. building control can go narners, "i did it before 2005"
Getting new shed, therefore new electrics.
shed is approx. 15m from house. we are getting a new split load CU under the stairs, so the house end will be up to date. I reckon we will need about 25m of cable to supply the shed. We need to supply fridge, freezer, and tumble dryer, as well as garden appliances. I know outdoor electrics need RCD protection, but with a fridge and freezer etc, how would we do this without nuisance tripping?
Here is my plan:
32A MCB at house CU (on non-RCD side)
4mm T+E to outside wall of house
then IP65 box to 4mm 3C SWA (all done in appropriate glands)
approx. 20m of SWA to shed
then terminate SWA in new consumer unit.
in new consumer unit: 63A incomer, 20A MCB to fridge and freezer (2.5mmt+e), 20A MCB to tumble dryer, 20A RCBO to socket for outdoor power, 5A MCB for shed lights (2 fluorescent tubes).
You guys think ive got this right? i mean, fridge and freezer only consume, say, 200w each, if that, and they hardly consume anything in winter! (allowing for starting current with 20A MCB) The tumble dryer (2500w) probably gets 1-2 hours use on average each day, not in summer though.
any comments appreciated. Cheers.
ps. i know all about part pee, lets not have any debates here. i know i am competent enough to do this work. building control can go narners, "i did it before 2005"