Supply cable size

[Matthewben]

Hi I am not electrically qualified but would like some advice please. I am currently having my house renovated. The supply from western power goes into a main switch that is in an annexe that we have near to the main property. The builders have installed a new armoured 3 core 25mm cable that goes from the main switch to the new consumer unit, approx 25m in length. The guy that is doing the electrics is a mate of the builder and although we have asked to see qualifications, he has yet to produce them. The missus overheard a conversation between them which suggested that the cable that they have installed was some that they had lying around and she thinks that it may not be adequate for the job and so she wants me to check. The house has 2 ring circuits at present, plus 1 for the kitchen. 2 lighting circuits, a double oven, 2 boilers, 3 showers and we are having an external circuit fitted. Sorry for the long post but the missus wants me to make sure all ok and as there are builders on site every day I can't get someone in to take a look. Please let me know if you require any more info.
Thanks

 

[shanky887614]

i know of someone that bypassed there meter with flex anyway it took two weeks and it finally went acording to him when he was in the shower and the oven etc was all on at the same time.

we are probably talking 1.5-2.5mm flex

XD i was in stitches when i found out

 

[Leesparkykent]

i know of someone that bypassed there meter with flex anyway it took two weeks and it finally went acording to him when he was in the shower and the oven etc was all on at the same time.

we are probably talking 1.5-2.5mm flex

XD i was in stitches when i found out

I've seen a bit of coax shoved up either side before lol

 

[davesparks]

Thanks for that, so the cable is fine, I'll check there is an 80amp fuse at the start of the cable. Is there anything I should be looking for at the consumer unit end or just the armoured cable straight into the box. So I assume you guys do the diversity thing across all the circuits in the box to bring the current value right down, right.

It's hard to describe what you should be looking for.
Take pictures of it all and post them here.
There should be a brass cable gland at each end of the cable with a plastic shroud over it. There should be no signs of damage to the cable and it should be supported and secured so that no strain is put on the cable gland.

 

[Matthewben]

Fair enough, I just got interested that's all. I like to know in my own head how things work. Could I just check though, should the armoured cable just go straight into the consumer unit at the house end. They connecting that up tomorrow so missus wants heads up as I'm not around.

 

[Octopus]

Fair enough, I just got interested that's all. I like to know in my own head how things work. Could I just check though, should the armoured cable just go straight into the consumer unit at the house end. They connecting that up tomorrow so missus wants heads up as I'm not around.

Post a picky tomorrow night for us!

 

[davesparks]

Fair enough, I just got interested that's all. I like to know in my own head how things work. Could I just check though, should the armoured cable just go straight into the consumer unit at the house end. They connecting that up tomorrow so missus wants heads up as I'm not around.

It should be terminated with a specific type of brass cable gland with the gland connected to earth by one of a few possible means.