I have to add a couple of 20 amp circuits to remodel our kitchen, though the bus bars in our panel are nearly full. The whole panel is nearly full, actually, though there is enough room for the new breakers, but not enough room for all the neutral and ground wires. My guess would be that they make panels with enough spots for all the wires from a full panel, but I think I am running short because of the few bedroom AFCIs I put in.
Anyway, my question is this: can I double up a couple of ground wires on the same screw on the bus bar? Is that an ok thing to do, or is there some other necessary solution?