Mains Tripping

Swap to a waterproof socket? Hardwire the dishwasher?

A waterproof socket??, Will it stop condensation forming in it???.

Sounds like a classic example of a socket in the wrong place, IMO the 'outlet' [1] should be relocated from behind the dishwasher.

I think that would be grounds for divorce - especially if the cable causes welts on the wrists.

Devel Move the socket, and mount off a wood block in oversize hole and full with expanded polyurethane foam. That should insulate it a bit.

Check room moisture levels, and fit humidity switched fan?

Uprate the RCD. Or put the kitchen ring on a bigger one.

Doesn't expanded polyurethane foam (the aerosol type) attack PVC cabling ?...

Usually only when provoked.

Steve

missus)

Upfate the RDC, what do you mean, arn't they all the same??

No, 30mA and 100mA available. At least.

or put a surface mount one there spaced off the wall by 3m with matchsticks/nuts/etc, plus add drain holes in bottom of backbox.

yup, or HRV better, or less likely a small dehumidifier.

... and they are for different purposes. In general in a domestic installation RCDs will be as follows:-

A 30mA RCD used to protect a circuit with sockets on it reduces the risk of electric shocks to poeple using that circuit. It's fast enough and

A 100mA RCD (usually time delayed) is protecting the wiring where the earth impedance isn't sufficiently low to guarantee tripping of the overcurrent device if an earth fault occurs. It is neither fast enough nor is the current low enough to protect people from fatal electric shocks, what it prevents is damage to the wiring and possible fire risk as a consequence.

If you replace a 30mA RCD with a 100mA without knowing what you're doing then it could be dangerous/fatal.

You'll also find that a 100mA RCD is not 7671 compliant in a domestic installation.

It shouldn't be done.

Rubbish - it is perfectly compliant with BS7671 for what it is intended to do (described accurately above in the text you quoted). A 100mA or greater RCD will actually be pretty much a requirement in any domestic installation with a TT earthing system.

Since its most common use is filling gaps round PVC windows, I'd hope not.

Well spotted.

I should read what I'm replying to first.

It doesn't help to read RCD and see "main" protective device.

Different sort of PVC though, isn't it? "ordinary" PVC versus "unplasticised" PVC. I don't know about polyurethane, but polystyrene leaches out the plasticiser in PVC cables, hence making them brittle. Got a few in the rewire I'm doing now - there's polystyrene *everywhere*

- ceilings, covings, walls...

Hwyl!

M.