"Palindr?me" wrote in message
...
paulfoel wrote:
OK. So the upstairs light circuit has got on it:-

- 3 combo fan/lights (3 bedrooms)
- 2 normal lights (1 bedroom, 2 bathrooms)
- 2 fans (2 bathrooms)

The one switch for one of the fans is causing the trip when its turned
on...

However, is it possible that the fault could like elsewhere in the
circuit ????



There are many more explanations that are possible, but unlikely:

1) The total load is enough to trip the mcb. So try the switch with
everything else on the circuit switched off.

2) The mcb is faulty and tripping on the fan motor start up - even with
everything else off. So try swapping the mcb with a different one.

3) The fan switch is a two pole one and wired incorrectly. So it shorts
the supply when pulled. Check the wiring.

4) The replacement fan is also faulty or wired incorrectly. So try it on a
3A fused mains lead.

5) You have been doing DIY and put a nail through the fixed wiring from
switch to fan. So replace the cable.

6) Rats have eaten through the cable in the loft/ behind the wall. Replace
the cable.

7) etc

So, try the following in sequence:

1) Disconnect the output cable from the switch and try the switch. If the
mcb trips, the switch is faulty or wired incorrectly.

2) Reconnect the output cable to the switch and disconnect the wires from
the fan, suitably insulating them in a choc box multi way connector.
Operate the switch. If it trips, you have a cable fault - eg rats have
bitten it.

3) Reconnect the fan and operate the switch. If it trips, swap the mcb.


--
Sue

Sue, I must ask you this.
You have started to do that cleaver ?B?UGFsaW5kcuKYu21l?= smiley
thing again with your "from" header.It certainly makes your postings
distinctive,
but it was only when you stopped that I realised you were called Palindrome,
and not Plindr me which sounds more like a request than a name.

Quite an enigma, are you going to leave it as it is?

--
Graham.
%Profound_observation%