RJ said:
Thanks for the information. All I know is that the scooter manual
lists the motor at 24V 250W and the fuse had 20A 250V on it. Why I
need the 250V fuse is beyond my comprehension. Requesting your advise
please.
You don't. A 32-volt automotive fuse will be fine. They put in a 250V
fuse at the factory because that's probably what they had on hand, or
a batch of 20A 250V fuses was cheaper than a batch of 20A 32V fuses.
It's a perfectly safe replacement, but not necessary.
Years ago, I and some other people were wondering, "what the heck is
a voltage rating on a fuse?" It turns out that it's the maximum open-
circuit voltage at which the fuse can safely interrupt its rated
current.
I've seen 32V fuses in a 240V circuit. They work fine, until one
blows - they blow, literally! I've seen one shoot that little
bayonet cap half-way across a factory floor. The 32-volt fuse
makes a nice arc at 240, you see.
I saw a 20A, 15,000V fuse once, that somebody had made a typo
when they ordered it. It was a USAF shop, so we couldn't send it
back. It was shaped just like a 3AG, but about 3" diameter and
about a foot long. The glass tube was about 3/8" thick, and it
was full of sand, with a ceramic core with 5 or 6 fine wires
in parallel, wound around it at about 3" per turn.
Hope This Helps!
Rich