Summary

00:00 - Right, Gareth has asked, how do you know what gauge of wire to use for a given amp mount, are there charts? Yeah absolutely there are.
00:08 We've also got a very similar question there from Adam Crole, how to calculate what wire size to use.
00:13 So yeah there's some charts, we make these available inside of our course so basically what you can do, and this is where the electrical fundamentals that I know are a little bit dry, such as ohms law come into play.
00:26 It is really really basic, all you need is a really basic understanding of ohms law and a calculator.
00:32 And by knowing the voltage that your system is operating, typically in an automotive system we're operating around about 13.8 to 14.2 volts.
00:40 If you know then the resistance of the actuator that you're trying to drive, you can straight away work out the current draw that you're likely to see in that wire.
00:50 Then using the wire charts, you can figure out what gauge of wire to use.
00:54 For most of our harness construction we're actually dealing with relatively low levels of current draw.
01:02 So we're generally going to be constructing most of the wiring harness from 20 or 22 gauge wires.
01:08 It's only some of the outputs such as the fuel pump, maybe the fans, maybe some of the ignition system components where we probably will be stepping up to a slightly heavier gauge wire so some considerations there.
01:23 That question was taken from one of our free live lessons.
01:28 If you like free stuff, and you're the type of guy that likes to expand his knowledge, click the link in the description to claim your free spot to our next live lesson.
01:36 You'll learn about tidily bundling a section of wiring harness, correctly splicing a single wire out to multiple wires that might need to head to the various sensors in your engine bay, and the materials and tools suitable for use in a motorsport environment.
01:51 You'll also have the chance to ask your own questions which I’ll be answering live.
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