Bathroom supply and earth bonding

[R'KID]

Hi all,

I'm currently refiiting my bathroom at home and have 2 questions.

1) I'm installing a spa bath and as such need to provide electricity for this. Ive taken out the old electric shower to replace with a thermostatic mixer shower, as such I have the supply for this in place in the bathroom with the necessary pull switch etc. Is it advisable to use this to power the bath or should i take a spur of the sockets? The pump etc for the bath is located under the bath behind a bath panel (tools needed to gain access). Also would you suggest fitiing an RCD to this? I'm ok with electrics but would like to know what is considered 'best practive' in this case.

2) The old copper pipework is earth bonded, however any new plumbing will be plastic (i.e. from old copper to new bathroom suite). The taps on the basin and bath are metal, do they need earth bonding if connected to plastic pipe which is connected to copper under floor?

Thanks,

Lee

 

[plugwash]

1: its fine to use it as long as you change the breaker in the CU down to something appropriate for the spa baths load

2: the copper pipes coming into the bathroom should be bonded the taps should not

 

[R'KID]

Plugwash, thanks for the info.

I've decided to use the shower supply but I'll remove the pull cord in the bath room and instead feed it to a DP switch and RCD on the landing.

Cheers,

Lee

 

[R'KID]

OK, one more question to ask. I'm using the existing shower power cable from the CU to the loft space above the bathroom (10mm square twin and earth) and connecting to an RBC fused spur then to a DP isolation switch. My question is can I put the 10mm cable into a junction box in the loft and take out 2.5mm T&E to feed the RCD as this will be much easier to work with in terms of connecting to the RCD. Obviously the spa has no where near the same demand as the shower so theres no need for 10mm cable.

Helps appreciated guys.

 

[plugwash]

yeah thats fine as long as the mcb in the CU is suitablly rated to protect the 2.5mm (20A or below)

you will need a pretty beefy junction box to take the 10mm though something like http://www.tlc-direct.co.uk/Products/AAJB60.html will probablly be fine

 

[R'KID]

Thanks plugwash.