Amps are amps...right?
Be nice ok? Size of wire determines current capacity (amps) as I believe. Recently had to replace a 30 amp fuse(U shaped). Had small size about same as a dime but needed next larger, about size of...
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MEXICOWANDERER wrote:
Please elucidate me as to the relevance of circuit capacity with regards to thermal/wattage issues? Next demonstration. Grab a handful of AGC 30 fuses. Impress 40 amps at 6V across one. Then 35 amps at 36 volts? OOoooo the 35 amps at 36 volts blows the fuse but how about the 6 volt fuse? This is why fuse sizing is an engineering art and not merely rough amperage.
This data sheet for AGC fuses lists the typical DC resistance (at 10 percent rated current) of a 30A fuse at 2 milliohms, and the typical voltage drop at full rated current as 0.12V. The impedance obviously varies somewhat with the applied current, but in any case it is but a few milliohms. Given that, there's no way to apply 40A at 6V to such a fuse, nor 35A at 36V.
