This would very quickly burn the motor out if sustained, so the motor's load is constantly monitored by the C5's electronics. If it stalls under full load the electronics disable the motor after 4 seconds, while if it is under heavy load (around 80 or 90 amps) it trips after two or three minutes. A heat-sensitive resistor inside the motor warns the driver if the vehicle is beginning to overheat and disconnects the motor after a short time, and a third line of defence is provided by a metallic strip mounted on the motor.