I've had two fires in my present motor home. One an engine fire when a holed piston pressurized the sump and forced oil from the dipstick, and caught fire as we waited at a short summer road closure on an Alberta highway. We were trying to get to civilization, and a new engine. Quick action quelled the fire instantly once we got to it from the front, replaced a couple of spark plug wires. The last was caused by a six volt battery shifting enough to short out in the rear compartment causing a main wire to burn across the vehicle to the other side, with the smoke alerting us. A good fire extinquisher controlled the fire after we stopped in the east lane of a Montana roadway, with a bystander calling the local fire department. Their truck blocked the only way past us, but finished the job, and followed us to the next turn off. Great work for them, so appreciated by us, as the volunteer fireman said then that they had lost two RV to fires, just the day before. The fires were five years apart. Any RV fire needs fast action with good equipment. After making repairs we exchanged our big extingisher for another, right away.