Help - temporary electric shower - permitted under Part P regs or no?

KillerWatt

louisdog wrote: »

My research has indicated that 6mm is ok for short runs on an 8.5kW shower

Your research is wrong, and cable diameter is worked out on more than just the length of run.

Get a proper sparks in, although you could be hard pressed to find one that is prepared to break the amount of rules you want broken.

Owain_Moneysaver

1984ReturnsForReal wrote: »

The shower has to have its own protector.

It does not have to have its own RCD. It does have to be on its own MCB.

keystone

Owain_Moneysaver wrote: »

It does not have to have its own RCD. It does have to be on its own MCB.

But you'd be a bit nuts not to fit an RCBO. And don't forget the double pole switch.

Cheers

1984ReturnsForReal_2

Owain_Moneysaver wrote: »

It does not have to have its own RCD. It does have to be on its own MCB.

All new installs have to be wired back to the consumer unit & have their own MCB

I know.....

Owain_Moneysaver

keystone wrote: »

But you'd be a bit nuts not to fit an RCBO. And don't forget the double pole switch.

The consumer unit is already RCD protected. There is no advantage to using an RCBO. It will add nothing for safety, and will not provide discrimination in the event of a fault on the shower as the time-current curves of the two devices will overlap.

Also fitting an RCBO is going to mean changing the busbars in the consumer unit.

keystone

Owain_Moneysaver wrote: »

The consumer unit is already RCD protected. There is no advantage to using an RCBO. It will add nothing for safety, and will not provide discrimination in the event of a fault on the shower as the time-current curves of the two devices will overlap.

Also fitting an RCBO is going to mean changing the busbars in the consumer unit.

Oh dear - I had my impish hat on last night wasn't it obvious? Presumably not then. Frankly I wouldn't trust the "consumer unit is RCD protected" statement in the context of this thread anyway so the whole discussion is academic.

The OP needs a sparks onsite to tell him what he should be doing.

Cheers

louisdog

keystone wrote: »

Frankly I wouldn't trust the "consumer unit is RCD protected" statement in the context of this thread anyway so the whole discussion is academic.

Oh dear, why's that then? Is it beyond the bounds of a normal person to know whether their consumer unit has RCD protection?

1984ReturnsForReal_2

louisdog wrote: »

Oh dear, why's that then? Is it beyond the bounds of a normal person to know whether their consumer unit has RCD protection?

Stay around & read a few threads over the next few months & you will understand...

keystone

louisdog wrote: »

Oh dear, why's that then? Is it beyond the bounds of a normal person to know whether their consumer unit has RCD protection?

Frankly in some cases yes it is. But in this case as the OP hasn't said which circuits are protected it might just be the one that supplies a garage. So I don't trust the statement one iota as its written. Is that clear enough for you? And put your tongue away please.

Cheers

louisdog

Thanks for the friendly advice!