I'm sure the red wire on the ground bus isn't compliant. I don't have a clue why but they used a piece of 12-3 for the water heater in place of the 12-2w/g for everything else. The two yellow wires feed a little neon on the outside beside the shore power cable box. The intent was a polarity warning. If you connected shore power and the light came on, you had a miswired source.
The unit was being fed from a 20 amp 120 circuit with an adapter. The FPE breaker tripped the first time I plugged in the juice. I reset it and it stayed reset. The GE protecting the outlet went first from then on. I believe the whole thing is OEM. I may have been the first one to ever take the cover off the box (after I removed the wood around it). I was also a little curious why there are a couple of circuits run thru separate KOs and all the rest are run thru a big nipple. From what I saw, whoever approved this system was pretty optimistic about romex and "dry" locations.
