My inspection had two breaker panels under a junction box. The wires were split-bolt lugged in the junction box, then fed to each panel.
Since the j-box was not a disconnect, do the neutrals and bare grounds need to be isolated?
They are old Pushbutton breaker panels, and one breaker (kitchen and some other lights) was “buzzing” during the inspection. The buzzing was not as loud after the dishwasher quit.
My recommendation is to repair/replace the panel with the buzzing breaker. I could see the discoloration under the terminal screw, and it had a noticeable arc when operating the breaker.
I was just wondering if the neutral and grounds have to be isolated, since there is no disconnect upstream, other than the meter.
The j-box is above the boxes. Sorry, I thought I had a better pic.