Goonerak 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?

In 95% of cases it means a fault that draws far more current than the
mcb's rating, simple as that. So faulty wiring.

NT