Quote:
Originally Posted by BrianG
The size wire gauge you use depends on the current draw and the length. If 10 feet of 10GA is good for 50A, 1 foot of the same gauge will be good for higher amperage. Any of those electronics books will tell you that, but probably not as simply. It's about how many ohms of resistance per unit of length. We are dealing with lengths usually under 6" in a typical setup, so that isn't a huge concern.
What I would watch out for is the number of connections you have. Deans are touted as having as much contact resistance as the same length of wire, which is probably true, when brand new. But connectors get dirty and worn over time (Deans, bullets, Powerpoles, whatever) and plugging/unplugging wears on them. The resistance goes up and so does voltage drop and the current capacity goes down. Not to mention all those possible points of failure.
6GA wire with the flexibility of Deans/noodle wire will be hard to come by. I think the biggest I've seen like that is 10GA. If you really think it's a problem, you could always double-up on 12GA on each connection, but it becomes rather clunky and messy.
No, the best/easiest way to handle this would be to use either 12 or 10GA and keep the lengths as short as possible. This might mean you have to rearrange things a little, but it's worth it IMO.
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Gotta watch inductance too. That's actually just as bad for an ESC as resistance in the wiring harness.
Long wires BAD. Short wires GOOD.
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