I have a kitchen counter in which there are two circuits coming from the breaker panel. They come into a two gang box and from there they feed the rest of the counter. What is coming in is three wires:
* One hot wire (red) from breaker 1
* one black wire (hot) from breaker 3
* one white neutral wire from breaker 1 or 3, I did not check but it is from the same bx cable.
The same corresponding wires are leaving to feed the rest of the counter - red, black, white and green.
If you cannot share neutrals, how are you supposed to wire this up?
PS. The work was done by licensed electricians but some of their work I cannot figure out.