Wiring of shower unit

shinealight · 25 Nov 2009

We had a shower unit installed two months ago.

The double pole ceiling pull switch malfunctioned and I obtained an exact replacement and fitted it. It is working okay.

However on reflection something is worrying me, - there was only one earth wire - which I assume is from the consumer unit.

Should there not be an earth wire from the S.U. which should connect into the same earth terminal on the switch?

The shower circuit is connected via an RCD.

scotteng · 25 Nov 2009

yes your correct in what your saying. there should be an eath from the consumer box connected in the switch to the one from the shower

have a look in the shower unit to see if there is an earth present. Could have been snipped off at the switch.

a earth continuity test will show if there is an eath connected.

shinealight · 25 Nov 2009

Thanks for your very prompt reply.

I have only limited knowledge of electrics, but I suspected that there should have been an earth from the unit.

Now back to the contractor,- he better come up with a good answer!!!!!!!

Appreciate your confirmation. Very grateful.

sparkwright · 25 Nov 2009

possibly two bare earth wires have been sleeved with one earth sleeve, giving the appearance of one wire.

1john · 25 Nov 2009

are you sure he didn't put both cpc's in one sleeving.

Taylortwocities · 25 Nov 2009

SNAP!

To shinalight. Why did the pull switch "malfunction"? Did one of the terminals overheat?

sparkwright · 25 Nov 2009

Taylortwocities said:
SNAP!

To shinalight. Why did the pull switch "malfunction"? Did one of the terminals overheat?

a good point made.

make sure all the terminals are fully tightened, and that they are tight as you offer the switch against the box. they can and will overheat if loose.

Taylortwocities · 26 Nov 2009

Where I was headed is:

If the terminals were loose and the switch failed
If the eath conductor is missing

then I would be seriously worried about the quality of this installation!

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Wiring of shower unit

scotteng

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