No matter the circuit protection device, this seems to be all about the incoming connection. I figure the circuit breaker will reduce that connection from two to one, but may still suffer from this odd heating phenomenon.
I really (really) thought I had this fixed.
Well, I fixed my Lario with an airplane engine..
2016-05-13_04-15-39 by Charles Stottlemyer, on Flickr
The elusive, but oft alluded to, Guzzi "drone" motor? This is gonna take some 'splainin', Chuck!
(Catch up with this story here: http://www.v11lemans.com/forums/index.php?showtopic=19687&p=214698 )