"Jeff" wrote in message
. com...

"
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


Even these little household fuses are filled with sand to do exactly that
job.