I installed one of
these in my fifth wheel and after a couple of years started smelling insulation burning. I found that some of the pre-wired connections had overheated, melted and were in danger of catching fire. I removed the it and added a separate 30 amp feed in the main box.
Although my box was Square D, I was able to use
this Siemens mechanical interlock device with a very simple alteration, consisting of bending a tab. Never had to worry about double feeding. Used a 30 amp extension cord, wired into the 30 amp feed and brought it out the front fifth wheel compartment, where my inverter was installed. I could also plug it into my Honda inverter generator in the truck bed.
