hot tubs

J

james king

hi all . i was just wondering the usall Kw of a hot tub. and what way you would all install it. eg. Cu in to a islotor close to the hot tub in SWA and then flex from there??? all help would be great thanks
 
I've had a read through a few instructions and it appears most are still to an american standard, they say to bond any metal work or pipework within 1.5m of the tub, to the main earth terminal on the tub and to protect with an RCD, don't shoot the messenger just what i've read.
 
I've had a read through a few instructions and it appears most are still to an american standard, they say to bond any metal work or pipework within 1.5m of the tub, to the main earth terminal on the tub and to protect with an RCD, don't shoot the messenger just what i've read.
Certainly don't recall anything to do with installing an earth rod, but I can understand the logic behind it. I did install current leakage protection (RCBO supplying the feed).
 
And some kits even come with the earth rod supplied.

Got to love the harmonious industry standards we have.....such a pleasure to work with.:rolleyes::rolleyes:

Agreed they leave it up to your professional judgment with an ambiguous instruction manual thats out of date by years or to a different standard then do you when something goes ---'s up.
 
Agreed they leave it up to your professional judgment with an ambiguous instruction manual thats out of date by years or to a different standard then do you when something goes ---'s up.

When you think about it, how can the manufacturer advise on the myriad of scenario's that these tubs will be installed in?

Pennywise is right, instructions are traditionally very poor, use them to decide what to clean the tub with and BS7671:2008 + experience to choose the supply specification ;)

Whatever, I would never install the supply without 30mA RCD protection and an electrode at the load end to at least reduce any potential differences.

I'd argue that method forever in court rather than pointing to the 10th generation photocopy of the American instructions from 'Mr Bubbly'.
 
Guys - sorry to hijack thread, but it sounds like there's some knowledge here!

I'm about to install a hot tub for first time. I am using 10mm T+E from the CU to the isolator located on the outside wall of the house. The tub will be approx 2m away from the house (on top of decking). I plan to use 10mm SWA to connect direct to the tub.

Daft question but what do I need to do to go from the 10mm T+E into the isolator while maintaining the IP rating of the isolator. Do I need to put a junction box inside the house to convert to SWA before going through the wall, as I presume I can't just use knock out and use blind grommet??

Advice greatly appreciated as I'm fairly new to this!
 
I would come through the wall with the T+E as the more joints you put into things the more chances you will get a failure.

Depending on your isolator I would drill the wall and tap in some PVC conduit through the hole and on the outside end leave perhaps 5mm protruding. Drill out the back of your isolator and fit, the 5mm protruding should just come into the box of the isolator. That should be good enough to stop ingress of moisture but I always put a dab of silicone arounf it just to be sure.

As above 10mm does seem to be a bit heavy, that is 50+ odd amps of load, is that the loading on the hot tub?
 

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