ringer
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Customer has installed a single-room summerhouse (wooden construction) in his garden, triangular shape with two 2.5m long back walls. Wants me to connect electrics from house. Summerhouse is 15m away from house, on opposite side of house to where main intake and consumer unit are. House consumer unit has 30mA RCD main switch which protects all circuits in house except shower which has its own RCD board. Nearest room to summerhouse is kitchen.
Propose to take feed from ring main in kitchen, through wall at back of a socket to adaptable box on outside wall. From there run 6943X 4.0mm under flagstone path (1m wide) then buried 300mm deep under edge of flower border (14m long) with warning tape buried at 150mm, to adaptable box on summerhouse, then in through wall of summerhouse to 2-way consumer unit (16A+6A mcbs). One power circuit supplying 2 x 2G flush mounted socket outlets inside and one 2G weatherproof socket on outside, and one light circuit supplying pendant in ceiling, surface mounted (mini trunking) inside summerhouse to socket outlets, though partly fed inside inner skin to flush mounted sockets. Light will be partly mini-trunking, partly clipped to surface (wooden roof structure) and partly hidden under board in ceiling.
Power usage is likely to be TV, games console, 2kw heater. Possible occasional use of electric mower, though they have a petrol mower at present.
Comments about proposed install please, particularly whether summerhouse cu should have RCD (if so how to mitigate discrimination with main CU RCD) and buried route/depth of swa. There is a fence but it is very rickety and customer wants cable buried, not in sight.
Have tried searching internet for 20mA RCDs but can not find where they can be bought from.
Position of CU - can it be put 18 inches above floor level, keeping it out of sight from windows, or does it have to be above a certain height?
Propose to take feed from ring main in kitchen, through wall at back of a socket to adaptable box on outside wall. From there run 6943X 4.0mm under flagstone path (1m wide) then buried 300mm deep under edge of flower border (14m long) with warning tape buried at 150mm, to adaptable box on summerhouse, then in through wall of summerhouse to 2-way consumer unit (16A+6A mcbs). One power circuit supplying 2 x 2G flush mounted socket outlets inside and one 2G weatherproof socket on outside, and one light circuit supplying pendant in ceiling, surface mounted (mini trunking) inside summerhouse to socket outlets, though partly fed inside inner skin to flush mounted sockets. Light will be partly mini-trunking, partly clipped to surface (wooden roof structure) and partly hidden under board in ceiling.
Power usage is likely to be TV, games console, 2kw heater. Possible occasional use of electric mower, though they have a petrol mower at present.
Comments about proposed install please, particularly whether summerhouse cu should have RCD (if so how to mitigate discrimination with main CU RCD) and buried route/depth of swa. There is a fence but it is very rickety and customer wants cable buried, not in sight.
Have tried searching internet for 20mA RCDs but can not find where they can be bought from.
Position of CU - can it be put 18 inches above floor level, keeping it out of sight from windows, or does it have to be above a certain height?
