Your National uses the House Batteries. The auto resetting breaker is usually located in the fuse block assbly in the right side storage compartments. But, rule out the Auto reset theory if when it stops and you immediately push the button and it jumps again. Auto resets do NOT reset that fast. Usually 3 to 5 seconds up to 10 seconds. To locate that auto reset, find the storage compartment with that breaker/fuse panel. Have someone operate the slide. When a Auto reset trips, it makes a distinctive "clink" sound. Doug