Originally Posted by
TomKing
25mm Cable? That means very little.
It depends on the core size.
2.5mm cable in a wiring loop (two wires from the fuse box to the socket) will allow 20amps on the socket. This would be fine for the size grow you are using, so technically, you could just use extenders from that double socket. But I would not be happy doing that, you will be too close to the power rating of the socket for my liking. But you can not and must not plug a heater or ac unit or anything like that in, you will exceed the sockets rating pretty quickly like that.
Splitting it on to two loops, would be better in my opinion. One loop for the lighting and one for everything else.
Personally I use three loops in my grow. One for lighting, one for fans and then just a main loops for random bits likes air pumps and my speakers for when im in there a while.
It depends entirely what he is installing for you. I would personally ask him to put a second smaller consumer unit in the shed beasty spur in the home consumer unit. Say you will be using a heater and power tools in there, and your worried about using your heater and kettle and power tools at the same time.
A heater and a kettle are combined quite a bit more power than your entire setup.
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