A re-wirable fuse doesn't blow without reason - and I've never had a bulb
blowing take one, unlike the common tales of MCBs tripping.

Well, it never blew when I put the cartridge fuse carrier in. My suspicion
is that the weird kinked route that the fuse wire was required to take
resulted in it being almost impossible not to damage the fuse wire when
installing, probably reducing its capacity dramatically.

Christian.