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Electrical

New 32A supply - Hot tub connection

Anonymous user 15/03/2024 - 2.42 PM

We are looking into buying a Hot Tub and looking at what is needed before we go out and buy one. My husband has a friend who has offered to install the electrical supply and cabling (although he is a commercial electrician). They have been discussing using the CU in the garage to add a 32A RCB (although also discussing a RCBO) in a spare slot. Cabling out with 10mm SWA to a rotary isolator a little way from where the tub is likely to go. If he does the work for us, I don't expect he will be able to self certify. If we need to get someone in from Building control, I'm not sure how long that would take. Is 3rd party Part P certification viable? is it as straightforward as checking the work has been done competently and to regulation? Edit: the distance between the garage and the potential location is c25m clipped to the wall - which is why 10mm is being considered...

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1 Answer

DEACON ELECTRICAL SERVICES

Rating: 5 out of 5

Grimsby

Just get someone in who is registered! ?10mm cable? Why? It will cost you a lot to get Building Control in, you have to get consent off them before you start the job. Edit.... 10mm is being considered? If it was underground, then yes, maybe 10mm. A calculation has to be made, including load, distance, nature of cable run, voltdrop. Nature of earthing at the source of supply. You say it is going to run from the garage, what size cable feeds that? and where is it fed from? Is it RCD protected, if so you do not need another RCD. As far as 3rd party certification goes, I can’t, legally, and wouldn’t anyway. Think Stroma or NAPIT allow it(sadly) BC would send round their contractor to test/inspect. If anything is not up to BS7671 you would have to put it right so it complies. A lot more complicated and costly this way rather than hire a registered person who can design, test and certify also notify Building Control on your behalf. Good luck.

Answered13 September 2018