

Ex: 5A,10A,15A,20Aĭetermining the Total Amperage of your Circuit DO NOT EXCEED THE VALUES ON THIS TABLE! Common automotive blade-style fuses exist at 5A-20A in 5A Increments. Take the maximum current value obtained from the table and find the largest fuse you can find that still falls within the limitations.The fuse size should be based on the SMALLEST wire (largest gage number) in the circuit.įor those of you who want to get right down to business, let’s not waste any more time, here’s how you’d go about calculating fuse size correctly in 3 simple steps: Actually, the load of the circuit should have nothing to do with choosing a fuse size. One common misconception about choosing the correct fuse size is that it’s dependent on the load of the circuit. It’s also a great idea to get an ATC fuse holder to protect and mount your fuse. For your fuse to do its job correctly and protect your wires, it should be rated about 1.1 to 1.5 times the rated current value. Things could get really ugly really quickly, so to avoid all that mess you’ll need to ensure that you get the right size fuse for the job every time. The main function of a fuse is to protect your wiring, but in order to do so, you’ll have to get the right fuse wire size from the start, too low and it’ll blow, too high and you’ll end up doing damage to the whole circuit! We’ll go into all the relevant details and what it all means so you’ll go from novice to pro in no time at all.
10 GAUGE WIRE AMP RATING HOW TO
This is an in-depth fuse tutorial explaining everything you need to know about fuses and how to size a fuse. Most people get caught up on fuse wire size but once you get the hang of it, it shouldn’t cause too many headaches.
