What wattage can a 30 Amp Fuse can handle?

Answer 1

First, a fuse with a current rating, 30 amp, is designed to allow current to flow thru the circuit or equipment or part of your car that uses or requires 30 amps and actually a bit less. If the current in the circuit, wires etc exceeds 30 amps, the fuse will open (a metal strip that burns some call it blown but it is actually an open so the excess current cannot damage the circuit or wiring it is associated with. Now, there are basic formulas you can use to calculate wattage (actually Power P) which would be the power rating let's say for the equipment you may be asking about. If your circuit is designed to use say 30 amps and it's in a car (12volt battery) the general formula would be P=IV=30x12=360w. If the equipment has a power rating and you have 12v then I (current)=P/V. The equipmet could be considered a Load (resistance R), you can calculate the current that would be drawn or used in the circuit by P=V2/R (that's V squared not x2) or P=I2R(I squared, not times 2). You can transpose ohms law to find R (the Load) Where V=IR so R=V/I.

That's the best I can do not knowing more.