I have an isolation transformer on our boat that isolates shore power and send 120v to our quattro 5000. We have several DC busbars on the boat with all the negatives ties together with 4/0 conductors.
Right now the quattro is the only place where AC PE and DC negative are bonded and that’s through the case bolt on the quattro through a 2/0 conductor to the main DC negative busbar.
I’m looking for guidance on where I should connect the 3600 isolation transformer Case bolt. Is it supposed to go to the DC busbar or with a smaller conductor to AC PE bus?