Shower circuit only RCD

[TPES]

I'd just like some views on my method for installing a shower circuit.

Plumber has asked me to install new shower circuit on a job he's doing, Customer has an old re-wireable CU, and doesnt want to pay for new CU change..

The only work i have been asked to do is install new shower circuit.. NOTHING ELSE.
So i wont be toucing the lights, Downflow heater or any other circuit in bathroom.

So i was going to split the tails at meter and install a dedicated shower unit, Just for shower, giving the shower 30ma protection, All other circuits will be on the old re-wireable board, as i will not have anything to do with these circuits..

I will be upgrading the bonding to incoming services, testing, and notification.

Job done..

Is there anything ive missed...??

And ok to leave other circuits on re-wireable board as wont be touching them..??

 

[martysparky]

Yeah, I think most things boil down to "manufacturers instructions". You could say that the switching device would be protected by overcurrent such in the fact that it is unlikely that a fixed load is going to pull more current than it is designed for.

Just my thoughts...

Yes was thinking that myself but the reg clearly states 'shall be protected with a device' so I guess if no device is present for overcurrent then its not to regs.

I guess this is why a shower supply unit has RCBO.

 

[electric-ian]

Hi,
Presumably as the existing bathroom circuits are not RCD protected, you will need to supplimentary bond to them even if you're only working on the shower..

 

[TPES]

Is that right?

Supp bonding is already there, But if it wasnt would i still be responsible for that ?