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Tom, just want to be clear here. There is a meter with 200 amp breaker and ground rod. Then there are 3 wires to house with square d 200 amp breaker with it's own ground rod connected to neutral bar. So, this inside 1st panel is apparently not bonded but should? If the bond screw on that panel...

I will also make those changes in the subpanel connected to the main. Mark neutral, use large lug. Anything else? When we are done with this I will throw something else at you. Ha ha

Sorry just saw your reply.

So, the only thing that needs to be done in this box is use large lug for the bare stranded wire, but leave on neutral buss bar?

There are only 3 wires for both buildings. There is a rod at meter, house and garage. Sorry, thought I indirectly answered that.

I definitely appreciate the help! Honestly my head is hurting...……………..Thanks

Yes, that wire needs to be moved to ground bar instead of the neutral bar. That goes to a ground rod, not from house. Does that neutral look bonded? Do I need to remove that center screw?

Yes, that bare wire is the grounding rod for supply. Need to use bonding screw for that panel?

Tank is in the same room as the house main panel. The breaker is in this panel. The detached garage is not even close to that meter and not really any practical way to change. Not sure I follow on the Building disconnect? The house is disconnected with the 200 amp breaker in the house main? So...

detached garage

sub inside next to main attached with conduit

main inside

Outside.

So, you would consider the outside 200 amp breaker as the main? This is where it should be bonded and everything after is separated ? Then each other box would require it's own means of ground to earth? They are but I think only 1 rod per box. I figured that the smoke alarm components couldn't...

I will look tomm. Well is not metal. For sure when house was built 1 rod was required, pretty sure? Ring not possible. Adding another rod is possible assuming this is now required or better safety? Detached garage is shut off completely from house main and garage has main breaker for shutting...

Tom. Thanks! This set up has been operating for about 18 years. I did not actually do this neutral myself but have been trying to help. Don't know about the EGC being run with the feeders? I do know there is at least 1 rod near the house. I was asked what happened and was not able to explain it...

No, the main and breaker feeding the subpanel was off. The neutral was in the subpanel. Then yes it was fixed. The only question now is what actually happened and not what is right or wrong. The exception being that bonding screw in the house main panel which is # 1 in the house but after the...

Thanks. Yes, it was wrong. To be clear, it was the feed neutral and not the detector neutral. That is fixed. If the subpanel was energized with hot/hot and no neutral would that then be 240 to connected breakers? Something definitely popped and smoked the detectors? It is all back the way it...

Yes the detectors were interconnected. I unplugged each one to quiet. The subpanel is connected with conduit so maybe that's why there isn't a separate 4th wire for ground. There is a disconnect at the meter socket 100 ft from house. Could it be bonded there? Not sure? What did the power up with...