Load from a single 2.5mm cable? in DIY Observatories Posted yesterday at 09:20 8 minutes ago, M40 said: Good advice from wxsatuser here. Make sure that the 230V comes from a nice 30ma rcd or rcbo device. The boxes I have used are ip66 grp enclosures available from most electrical wholesalers or RS components. Use plastic 25 or 32mm compression glands drilled in the bottom only (yes I know I have one in the side , I will plug it eventually). Oversize the glands, you are not looking for them to be weathertight but you will need sufficient space to get the cable plugs/connectors though. The box you can see houses all the bits and bobs with the second box housing the connectors and cables. Mistake I made was going too small with the second box, the cables just fit so I suggest getting the same size two boxes or at least one thats big enough to get the cables in easily. The boxes stand on unistrut brackets but any frame to space the boxes off the floor is the way forward as you need space between boxes, cable glands and a few spare inches for the cables. Enjoy Thanks for the advice, I was looking at RC over the weekend and they have a huge selection of wall boxes but would obviously select a plastic/abs one. It's going to take some time to put together but this thread has been very valuable in understanding how best to approach this. The power supply, currently located indoors, is already protected with an RCD located in my office so hopefully I got that part right already.