On 05 Nov 2005 13:54:45 GMT, (Andrew
Gabriel) wrote:

I suspect the lamp which failed arced across, drawing high current,
and blew the dimmer (after all, it tripped the MCB instantly, which
probably means it passed over 30A momentarily). It might have only
blown a fuse in the dimmer, but IME it is likely to have blown the
triac (the key semi-conductor component).

Give that man a prize. I swapped the dimmer for another one, and sure
enough it worked. The coil (inductor?) on the orig dimmer was
blackened. I thought the MCB would have tripped before the dimmer had
a chance to blow, but there ya go.

Thanks

-Rob