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Can the connection to power a cooker hood be taken as a spur off the supply side of 45amp cooker switch and plug socket using 2.5mm T&E? The switch/socket in question is on 6mm T&E straight from the CU.

are you suggesting that people work on sockets without isolating them from the supply first? tut tut tut.

no worries i'll just do both, it just makes it a bit less fiddley if there isnt a wire connected to the back box

Is it ok to not run earth to the terminal on a back box sunk in to the wall on metal faced sockets as long as it is run to the terminal on the socket itself so that the face is earthed? I assume that the contact between the screws, the face plate and the back box mean that if the front is...

Thank you, that clears things up. I'm beginning to think that my best bet is to buy 7 more transformers and run one light off each, at least that way i get 9 lights all the same brightness.

OK I think i've worked this out. The last metre of the 5 only has 20W of load on it, the 3-4 metre length has 40W and so on. This means that only the first metre of the cable from the transformer to the first light has 100W of load on, meaning that 1mm or 1.5mm would be ok. Does this make...

Sorry I was replying to the other fella who asked whether they ran in parallel off of one cable or whether there was a cable running to each light. The setup with the cable in the kit is one cable with light connectors every 70 centimetres.

They run in parallel

So will I be ok with 1mm cable then?

So surely there is something seriously wrong with them selling me a kit which has 1mm cable in it when if you put the figures in to the calculator it comes up with 4mm?

no, thats the whole point, all of this cabling, including the3.5m wire that came in the kit goes on the 12v output side of the transformer. EDIT: I've just read your edit.

I put in: Twin and Earth clipped to wall Load 100 Watts Voltage 12 Length of Cabing 6 Metres It says 6mm Please tell me i'm not going mad! :?

Well thats put my mind at rest seeing as i've already done half the wiring! I dont understand where i've gone wrong with the calculation though. The load is 100W if there are 5 20W lights attached right? Cheers very much for the help though

How come when i put the figures in to this cable size calculator it comes up with 6mm2? http://www.tlc-direct.co.uk/Technical/Charts/VoltageDrop.html

I bought some 12v 20W mini recessed spots which came in packs of 5 with one transformer and an already made up cable which is 1mm2 twin. I cant use the cable that was included because it is too short. If I make up my own cables what diameter cable do I need to use because the total run to...

Help! I've just retiled my entire bathroom and i've just got to the point where i'm going to fit the sink (a pedastal type) to the wall. This is where the problem begins. I've just merrily drilled through two of my tiles and discovered undernearth a rather thick layer if plaster. On of the...

I've decided to try and work out whether the leak is coming from inside the cistern, or is coming up the thread from the connector to the water pipe. Once the missus has finished in the shower I'll turn off the water and disconnect the pipe with a full cistern and see if i still get leakage...

I fitted a new toilet a couple of weeks ago and everything seemed fine, but it now appears to be leaking at the point were the water flows in to the cistern. Its one of this little ones with a push button flush and no ballcock. The place where its leaking is between the body of the cistern and...

I am replacing the floorbaords in my bathroom with 18mm plywood to give a nice level surface to tile on. My Question is: Do I need to leave expansion gaps between the boards and if so how much?

I reckon i'll do that then, because of the shape of the room I can get away with only one join between the two sheets which would run along a joist down the middle of the room. Cheers very much.