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I've made several attempts to get a builder to either replace an existing small flat roofed porch with a larger pitched roof porch to the front of my house (all building/planning permission obtained), but with no joy. They come, they measure up, they take away copies of my plans and then they...

Many thanks to you all, very much appreciated. :D

Doh! Looks like I've added an earth throughout for no good reason. I'll leave it now its there and remove it on the next overhaul, unless of course it is advisable to remove it. Is it?

Yes, I assumed that meant the consumer unit - don't ask me why! What should I have done? :shock:

Did it work?

Did it work?

Rob - I have a scanner, but not clear how I insert the image (not as clever as some of you out there). Can you guide me?

That may be so, but the leaflets (as with the DP switch and tbo) came with the instructions printed and produced by Wickes and Homebase respectively (British companies, I believe) clearly showing and describing the need to have an additional earth wire to the consumer unit for both items.

Additional earth from the terminal outlet box to the DP switch and from the DP switch to the consumer unit attached to the tob and DP switch earth connectors according to instructions. As I say cooker is working so hope this is just excessive at worst and necessary at best.

Its in and working so thanks for the help. Also added an earth to the consumer unit as per instructions on the switch, etc. Not sure why though with 2c+e cable throughout!?

Thanks Rob. So, thats a 2.5mm2 T+E from cooker to terminal outlet box (you didn't say, but I assume I'll need one?), then the same cable to the DP switch (13A switched spur or a 20A DP), then the same cable to a 16A MCB in the consumer unit. I'll be using plastic conduit to route...

Thanks for the quick reply. When you say "A switched spur is a double pole switch", am I to presume you mean the spur for the hob? This is only 13amp and although I am led to believe a 13amp takes 3kw as a maximum the instruction book says different. Sorry to be pedantic, but can you be a little...

I have bought a 3kw built in cooker to replace a gas cooker. The gas hob is staying and its ignition works via a 13amp plug. Distance from cooker to consumer unit is approx 15m. Instruction booklet suggests fuse of a min 15amps and max 20amps with min 2.5mm cable and a double pole switch...