"
The physical size of the fuse IS important when you are considering
spark-gaps etc, which is what caused the dramatic failure in this case.

Incorrect. What is important in this respect is the breaking
capacity of the fuse. Different designs of fuse, with the same
physical dimensions, are able to reliably break different currents.


Not incorrect, some fuses have fillers in the tube to help prevent arcing at
EHT voltages. Fuses will normally have a voltage rating as well as a current
rating and type (fast blow, anti surge etc.)

Jeff