The polytunnel is about 10m from the house. Because the house wall is 3ft thick, but single storey, I'm going to run the 2.5mm SWA cable, along with the water supply pipe, from the attic down the outside wall and into a tren ch; suitable protection will be used for the vertical drop.
Do I have to take the cable back to the CU or can I use an FCU and run it a s a spur off one of the house ring mains ? Particular reason for this is t hat the house CU is full !!
I'll use a 2W CU in the polytunnel for a light and a 13A socket for the hed ge cutter.
I'm looking at the TLC website and the UK DIY WIKI - am I right in thinking that TLC's 2 Part gland is what I would use for the indoor end and the 3 p art for the polytunnel end ? I've not used SWA before.
The house earthing is TT with an earth spike. The system has RCBO's and an RCD - the other out-buildings are RCD protected and with a second spike. Should I install a third spike near the polytunnel which is on the opposite side of the house from the other out-buildings, but quite close to the mai n spike?
Thanks Rob