I'm using two Pololu Dual VNH5019 Motor Driver Shields powered with a 55 amp max external power supply.
When I plug the power supply in, without either shield or arduino on, the 10 gauge power wires get warm very quickly. I would think that nothing would get warm until I actually plug in some motors and start using the motor shields. Do I have a short somewhere or is this normal? The motor shield jumpers to power the arduinos are not installed so the external power supply is for the motors only.