It may not be the current capacity that is the issue. The resistance and capacitance per metre change with wire size. A larger conductor has a lower resistance than a smaller conductor. So a 10 gauge or 3mm sq wire has a lower resistance for a given length than a 12 gauge or 2.5mm sq wire. Some circuits are sensitive to resistance and performance drops with increasing resistance in series with the circuit. In automotive applications where we only start out with 12 volts the main concern is voltage drop, which increases with length. So to compensate for voltage drop you increase the size of the wire because what ever is connected in the circuit needs 12 volts and not 10.5 volts.I just remeasured all... My results show the majority of wires at 20gauge with 1 or 2 wires on each side being 18 gauge. Most are 0.036inch conductors, with the larger being around 0.04.
I'm just going to leave it. Nothing says chopper like mismatched wires right 😆. But in all seriousness, 18 and 20 are very close in amp capacity.
Yes I am a electronics engineer, you guessed that right. Sorry to disappoint you but the Fury is not a digital device other than the ECU. The lights and switch gear are just plain old wires, resistors or load (headlamp and turn signals) and relays.Wow! I appreciate that quite thorough answer... that probably took a really long time to type. You must be an engineer 😉. It makes perfect sense... If I had to guess, a lot of handlebar stuff is binary, and wouldn't carry a value based on voltage. I think it would be safe to say as long as all functions check out, then everything is happy in this case?
I can second that as a Civil Engineer & a Builder!
Technically it is a safety factor. In the faculty of engineering at the University of NSW it was always referred to as the anti bugger factor, mainly I think so that we would remember to make allowances for the things that go on in the real world. I remember well the senior professor of electronics engineering saying in a lecture that if someone can stuff up your design they will so plan for them to bugger it up. Over spec everything. LOL.Lol, we call that a factor of safety in my line. Last thing you want is snapped bolts, material failure, and a scrapped rocket engine!