I have 4 Model As a '29 coupe, '29 CCPU, a 30 AA SB and a '31 AA LB, all have both the safety fuse and a battery shut off switch. I park them in a garage with six other vehicles and I do everything I can so that a electrical fire will not happen. If there was an easy way to disconnect the battery on the modern vehicles I'd do that also. All the wires on the As have been replaced with reproductions, after I noticed that the 85 yr old wires were not in the best of shape. I have insurance on everything to cover value, but that value does not include the many 100s of hours that I have put into them, and at my age I don't have the energy to do them again. They are all drivers and not fine point judging vehicles so exact originality is not a issue with me(in relation to the safety fuse and shut off switch). I also shut off the fuel valve when I park my As and disconnect the battery via the switch, even if they will be left for only a few minutes. My dad use to say an "ounce of prevention is worth a pound of cure" This is how I do it, your mileage may vary
I think many should take a hard look at this and check all their wires, maybe even once a year, replace or fix what might need repair. This is like a warning commercial for us all.
Very sad to hear , too many fires lately when most can be avoided for $20, Put a master switch mounted in the floor boards easily , GET IN THE HABIT, FUEL OFF, IGNITION OFF , MAINS OFF , then exit the vehicle, simple , it won,t burn, unlikely to get stolen , How many of you run master switches & use them , I know I do, even with new wiring, ??
Someone posted these pictures a while back. These "wires" are on the back of an ammeter.
My guess is the fuel tank vapors had an ignition source (assuming no fuel leaks)... Makes me want to put insulation behind my ampmeter... Dang problem is the tank is ground... The meter should be totally electrically insulated from the tank... I wonder if getting shrick wrap might be snapped in the fuel tank cavity where the meter fits?
Also, for those who carry a fire extinguisher, buy a new one.. Mine's too old so grabbing a new one.