pic: 3692's PDP after catching on fire at Queen City

[philso]

It could have been a faulty 40A breaker that was not opening so save the part if you can.

My money would be on a faulty connection in the spring clamp connector in the PDP. Look into the connector with a flashlight to see if there may be some insulation in the connection area or something like that.

A high resistance joint can cause heating leading to a fire. We have had fires in the equipment we build at work when the bus bars are not bolted together tightly and 1000-2000A is put through the connection.