tarnold wrote:
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 a nickel. Went to Autozone and got what I needed. They had same style that was about the size of a 50 cent piece, if you can remember what they look like. All 30 amp, so question, why the much different physical sizes, if all are still 30 amp rated?
Different sizes can handle different voltages but I think the real reason is the Almighty Dollar.. Yup, Profit.
You see with 3 different sizes of blade fuses. You have to buy 3 times the fuses to insure you have a spare, this means more PROFIT for they manufacturers.