You can put two ground wires under one screw but only one neutral under a screw. You could also add a second bar.
I agree.You can put two ground wires under one screw but only one neutral under a screw. You could also add a second bar.
Be aware that the enclosure cannot be used to interconnect the neutrals. WHat this means is that all the neutrals (existing and new) have to be terminated on the neutral bar with the green screw (main bonding jumper). You may have to relocate some of the ground wires to the new ground bar to make room for the new circuit neutrals. Or you can install a jumper between the new and old bars.After looking at the panel more closely it appears that there is a screw going through the neutral lug to the back of the panel box. I would assume that this is the screw that bonds the neutral bar to the panel and that when I screw the new bar to the panel that they would be bonded together.