Hot tub volt drop

[smity]

If you listen carefully you might hear a collective groan as this subject has been discussed a lot recently!
Brief comments:
Option 1 is compliant but has issues. I used to do this but wouldn't now. See recent thread on tingly feet when getting out if you want a long read. [Also IET Guidance Note 7 (Special Locations) does have stuff about hot tubs outside coming under Section 702, as a recommendation)
Option 2 - What I'd do.
Option 3 - Also Fine but I'm missing the gain over option 2 - complete pot luck which RCD would go? If you could avoid upstream RCD this would clinch option 2 for me.

Thanks for your reply, its much appreciated.

i understand the groans and i have spent a lot of time reading the other threads and various other documents trying to find the best option, also spoke to other electricians and everyone seems to have a different view.

I agree with you on option 2 being the better option and most probably what i will go for TBH unless anyone has a reason why this wouldn't be acceptable.

Thanks

 

[Pete999]

Can i get away with 6mm SWA on a 50m run for a 32a supply to a hot tub? Cable will be burried.

I believe its very close to being over the 5% max Permitted?

Whats your thoughts, should i go up to 10mm?

Thanks

What do your cable calcs tell you? if of course you have bothered doing any.

 

[smity]

What do your cable calcs tell you? if of course you have bothered doing any.

My cable calcs told me that the only limiting factor would be the VD (5.19%) at 50m using installation method 72 - D2 but as its only 45m it would come under the 5% for a power circuit.