Supply to Outbuilding

[reggie10]

whilst i have some ceilings down i want to run a cable approx 12 metres from CU through the house and then a further 12 metres outside to an outbuilding/garage. i want to use normal domestic power tools, lighting and possibly a freezer and treadmill in the outbuilding.

Can someone please recommend a cable size to use - presumeably i will need to allow for a connection to armoured cable once outside.

 

[malcolmsanford]

I would say that for a 25 metre approx run you will need a 6mm cable ..........there that is simple

What is not so simple is mate

1. What type of protection device are you going to use
2 RCD what are you doing about this
3 What kind of earthing system is in your home
4 You do know in England and Wales this comes under Part P
5 Have you got calibrated test instruments to carry out the test required to complete all the paperwork
6. Is the out building of a metal construction
7 Are there going to be any metallic service ie water in there
8. As you are having a tread mill in there can we assume you may also need heating
9. Then perhaps the loading may increase if you do

And 10 ......perhaps that 6 mm might not be enough mate. All i'm trying to point out is that it is impossible to advise on the size of cable without really designing a system that will supply it.

 

[reggie10]

Hi - Tried to reply earlier but not sure if it worked.

To clarify - i have an existing consumer unit under the stairs which is fitted with mcbs although there is no more room i am assuming that an electrician would be able to install additional capacity for me. i propose running a cable from under the stairs through the house to the utility room at the far end whilst ceilings are down in the relevant rooms. i am in a hurry to get these put back up as i have a kitchen due to be delivered hence why i am asking my question on here rather than wait for an electrician to come over.

i am only proposing to run the cable through the house and leave the cables hanging for future connection and not undertake any other work in respect of this - i am aware of part p etc as i am in the middle of renovations and extension.

the outbuilding is a blockwork garage with steel door - there will be no heating. i assume armoured cable would connect at the utility room and then continue underground to the garage where a CU would then service a lighting and socket outlet circuit. i also assume an earth rod would be serve the garage.

Sorry to be vague on this - you see i am not an electrician - i had hoped this type of thing was fairly standard and not as involved as it now seems. Any further help or guidance would be greatly appreciated.

 

[Octopus]

If you have a deadline to run the cable before your kitchen is fitted, then I'd say you should run 6mm (or 10mm) T & E from the board (leaving a long "tail") through the house to where you think you'll come out (again leaving a long tail).

If you're in the middle of a renovation/extension then surely you have a sparky involved??

 

[reggie10]

Thanks Murdoch - yep had an electrician in a month or so ago doing the new kitchen area. i forgot that i also needed a supply for the (new) garage until today when ordering materials etc to put the ceilings up (panic!). i have a friend over at the weekend to skim them out etc. would have called the electrician i used before but (1) i wasn't overly impressed with his work/time keeping (2) he wasn't the most approachable of guys!

 

[Octopus]

Thanks Murdoch - yep had an electrician in a month or so ago doing the new kitchen area. i forgot that i also needed a supply for the (new) garage until today when ordering materials etc to put the ceilings up (panic!). i have a friend over at the weekend to skim them out etc. would have called the electrician i used before but (1) i wasn't overly impressed with his work/time keeping (2) he wasn't the most approachable of guys!

Why don't you post your location and see if any of the members here want to do the job?

 

[reggie10]

happy to - i'm in Camborne, Cornwall. Won't be ready for the armoured cable to be dug in yet though as i have a few tonnes of rubbish to be removed first (do electricians dig?!), and money needs to go on finishing kitchen first but contacts would be useful.