wrote:

MCBs are prone to nuisance trips, fuses rarely are. If your fuse is
popping when the bulb goes, something isnt right. If you fit an mcb you
will have more nuisance trips, not less.

Mains halogen bulbs seem to be the worst culprits here, but any filament
bulb can cause a current surge on failure if it manages to ionise the
gap between the feed wires at the end of the filament.

Its not usually necessary to go round replacing functioning fuses with
MCBs. If you want to worry about risks, getting hung up on trivia like
this is barking up the wrong tree. Your stairs are 100 times riskier.
Beds, roads, food, kitchens, power tools... not fuseboxes.

Adding RCD protection on appropriate circuits will probably make more
contribution to safety than just replacing fuses with MCBs. The MCBs
will obviously be more convenient should a trip occur.


--
Cheers,

John.

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