How do I pick out the size of my fuses and wire for my generator elecrical system?
Let me first start by saying the standard disclaimer stuff that you are responsible for following electrical guidelines established in your part of the world. In the U.S. you must comply with the national electrical code (NEC). Attention should be given to Articles 310, 392, 400-5 (flexible cords), and 501-4 Class I, II and III, Divisions 1 and 2 hazardous locations. Remember to use the “Ampacity Correction Factors” when the Ambient Temperature is different than those indicated in the Tables. Also, derating is required when using more than three conductors in a Raceway or Cable. You need to have a certified electrician or automotive mechanic look at your wiring to make sure you didn’t do something dangerous. With that said, a typical person generating power at 12 volts will get a max current of about 10 Amps. This is calculated by assuming a case where a fit adult person can average 120 Watts over a 10 minute period. Using the formula Watts = Volts X amps you can solve for Amps = Watts
