When I had PV panels installed in Massachusetts in the early 2000s, the electrical inspector came out and asked me if the job was correct. I told him, yes, this is my house and the job will be correct. He asked if the 12-2 UF going through the roof should be SE. I told him I didn't think so, as the maximum fault current would be about 5 amps and for about 2 cycles. The building inspector brought a pair of binoculars and he asked if the panels were firmly attached. I said the I had had the installer run bolts through the plywood roof "deck" into 2x4 pieces under it.
Later when I got time-of-day controls and heat storage electrical heaters, I almost got into a fight with the electrician who was doing the installation for the Power Company, he kept ragging the helper doing the installation.
Then when the control line from the control box to the 50A 240V spa heater would wipe out the entire AM spectrum, I determined that the problem was the control power was very unclean from the immersion heater and that if you put a relay at the heater and controlled it with "clean" power from the control box, the EMI went away. He came back to install a relay and was planning to mount it on the inside of the cover of a 4x4. I objected to that saying it didn't look safe to me, that the relay needed to be mounted in the box instead. He got huffy, and I said I am the owner, what I say goes, if you don't like it, just leave the relay and I'll mount it. He mounted it but I though he was going to blow a cork.
Guess I was a bad:rant: customer.