Letter Re: Jumper Cable Gauge
Hugh, The Prep Your Ride recommends 4-Gauge jumper cables, but I say 2 Gauge is the minimum, and the lower the better. The power is Current Squared over Resistance, so your 800 Amps / 14 V at your end might end up under 6V, under 300A at the car you are trying to jump. It is going over 10-20 feet so even what seems a trivial resistance causes lots of power loss even if the cables don’t heat up. At least a half dozen times, with one car racing the engine and the other failing to turn over, I swapped …