OT: fuses

From: vrs <vrs_at_msn.com>
Date: Sun Dec 28 14:54:12 2003

> As I recall from the UL presentation I once attended, fuse voltage is
pretty
> much irrelevant, within certain windows. Most of the reason fuses have
> voltages ratings has to do with the carriers and the arc-over voltage.

Wouldn't the fuse also have to dissipate (2 amps-epsilon) squared times the
fuses internal resistance indefinitely? (If the resistance approached an
ohm, that would be almost 4W.) I guess that would be independant of voltage
though.

Also, wouldn't the fuse have to be rated not to explode/burst/set the
appliance afire while dissipating boatloads of watts (250V/1ohm = 250amps,
250A*250V=62Kw) for as long as it takes to vaporize?

    Vince
Received on Sun Dec 28 2003 - 14:54:12 GMT