Reply to post: 500W at what voltage?

500W at what voltage?

I shudder to think he'd be running it at 5V… that's a 100A busbar that'd be needed to power the thing!

I've seen what power leads carrying 400A look like, feeding a 20kW 3-phase BLDC motor. We'd lock the rotor to measure torque, in doing so, we'd watch two wires get attracted to each other, and two repel each other according to magnetism (F = (µ₀I₁I₂l)/(2πr)).