allen8106 wrote:
I suspect maybe moisture got inside the connection and caused a short which over heated the connection. The breaker inside my work shop that powers this circuit was tripped also.
It's possible.
One should NOT leave a connection like that exposed to the weather.
That kind of a situation typically starts with a bad connection inside the plug. As it heats up, the connection gets worse. Eventually that progresses to the point that it starts arc'ing which produces carbon and then a short.