Thread: MCB won't reset
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Frank Erskine
 
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On Sun, 10 Jul 2005 22:25:47 +0100, "Sparks" wrote:

Just had an MCB trip.

It's a 6A MCB with only 1 fluorescent fitting on it. Turned off the switch
to the light and the MCB would not re-set. I then removed the started for
the light and the MCB still won't re-set.

Anyone got an idea what the problem might be?


As the switch is off to the light, that rules that fitting out (Unless it
has be wired to switch the neutral, rather then the live!)

If this is the only thing on the circuit, then there must be a cable fault,
or the MCB is faulty.

Does it trip immediately, or is there a delay?

Have you knocked any nails into the wall recently!?

Any other DIY work done recently?

Possibly a faulty switch, or the wiring in the switch box. Make sure
there aren't any loose wires in the switch box, such as the incoming
line, which may have jumped out and made contact with the back-box.
You don't state whether or not you have an RCD as well.

--
Frank Erskine