What knock-out connector goes in panel

[pauls340]

When you add a circuit to the main panel (basement), is there a special knock-out connector that goes in that hole or just the same ones that go in a wall plug box?

 

[pattenp]

If using NM wire you use a NM connector.

 

[GTO]

IIRC you can also use the black plastic push ins.

 

[pauls340]

got those...thanks