More melted fuses/fuse block.....contact resistance
I just got back from a week camping in Moab and Flagstaff....van worked fine....
I thought that I may have a separator issue...poking around the electrical stuff I found this:
The melted green blob was a 30A fuse that powers my electric water heater. The metal part of the fuse was still in-tact and the water heater was still functional. Apparently, 18A through that fuse was enough to melt things (my water heater element is 300W and draws about 18A). One of the faston 1/4" terminals going to the water heater relay was also a bit scorched but still functional as well.
So what is puzzling me about all this is that pumping big amps through a small ATO fuse makes enough heat to melt things..likely due to contect resistance..seems like the physical fuse size needs to get bigger with larger currents.
One other lesson learned here is to not use crappy ebay cheap fuses.....name brand fuses like buss, etc appear to have a nylon type plastic which will likely survive higher temps. The green fuse on the left (which will be replaced very soon) is one of the cheapies........the yellow one below it is a typical higher quality unit.
I've had similar problems in the past with a fuse from my solar panel melting the fuse block as well....