Hot tub supply

[Bradley6969]

Hi, having new hot tub installed, PME supply on 40A breaker 6mm twin clipped direct in loft down to 32A isolator, got some 10mm 2C laying around, and gonna use swa as earth from isolator will that be fine, (thought I’d ask not sure what these companies are like and I’m not around when they install so gonna lock off isolator and breaker and leave key for them)

Thanks

 

[Strima]

32A iso on a 40A circuit?

 

[telectrix]

what's the rating of the tub?

 

[Bradley6969]

32A iso on a 40A circuit?

Sorry actually on 32A breaker

 

[Bradley6969]

what's the rating of the tub?

Just says 32 amps, has 2kw heater all I can find

 

[telectrix]

that's only 10A. usually fitted with a 13A plug and inline 10mA RCD.

 

[Bradley6969]

that's only 10A. usually fitted with a 13A plug and inline 10mA RCD.

yes, must be all the jets aswell as there’s a few of them and heater once all switched on together

 

[Sparky Pat]

think you will find that you need to take it off the PME system and make it a TT system.

 

[Bradley6969]

think you will find that you need to take it off the PME system and make it a TT system.

Why’s that

 

[D Skelton]

I'd be breaking the earth on a PME and rodding down adjacent to the tub. 8 foot coupled rod. Small non-conductive four way external IP rated board with a 10mA and a 100mA s-type RCD in line. Rotary isolator mounted adjacent to the board. Take off a non-RCD way at the supply DB.

If you want a proper job that's the safest way to do it.