Type C Mcb

[Guitarist]

If you were to rod the hot tub's panel then it would have to be either isolated from the supply earth by not connecting the cable's earth at the hot tub end (creating its own TT), or you'd run a 10mm bonding cable back to the supply MET.

 

[Engineer54]

I'm thinking more towards this tub being located/positioned on bare ground or grass. I'm not really that bothered about broken neutrals on a TNC-S/PME supply, as the chance of ever seeing that, is going to be remote to say the least!! As stated i'd be installing a 3 core 6mm SWA supply cable out to this hot tub, which would provide an ample CSA of copper CPC going back to the MET. I'd probably also use a 6mm earthing conductor from the hot tubs local earth rod too!!

Bare feet on wet earth and grass, or on wet concrete is another matter altogether though, ...now you're in the realms of potential differences and step voltages!!

 

[Engineer54]

If you were to rod the hot tub's panel then it would have to be either isolated from the supply earth by not connecting the cable's earth at the hot tub end (creating its own TT), or you'd run a 10mm bonding cable back to the supply MET.

I'd be happy to have either, (if the TT was of a low value). In this case, I reckon 6 mm of copper, will do an adequate job of protection, even if it's not exactly what the BGB say's!! lol!!

 

[Guitarist]

I'd be happy to have either, (if the TT was of a low value). In this case, I reckon 6 mm of copper, will do an adequate job of protection, even if it's not exactly what the BGB say's!! lol!!

I agree Eng. Just quoting regs really for the op

 

[Engineer54]

I agree Eng. Just quoting regs really for the op

Actually, seen more than one manufacturer clearly state, to connect a supplementary earth rod (and sometimes supplied) to the Hot Tub/ Jacuzzi control panel.