Is anyone else having troubles with gfci receptacles or circuit breakers tripping at fire stations or ambulance bays while these emergency vehicles are parked waiting to be dispatched. Our vehicles are plugged into a dedicated 120 volt/ 20 amp GFCI circuit using a hard usage cord and cord cap. This is an 8 bay fire station w 8 trucks and only one truck seems to be tripping the circuit. The truck is a newer truck and the fire chief keeps looking at me for a fix. What are your thoughts?