How many Romex connectors are allowed through a connector?
I'm adding a multiwire circuit which I ran last week. It's time to hookup to the breaker box (GE TM2020CCU). The problem is that all of the knockouts are used on top, where my romex comes from. To preserve a "clean look" around the plywood where the box is mounted on, I'd like to enter through the top.
I noticed that the electrician passed two, sometimes even three romex cables through one cable connector. Is this allowed (three cables)? I would be adding a 14-3 to a connector that has two 14-2 cables through it.
I'm planning on adding a subpanel in the future, with this new cable added to the subpanel. Should I use one of the concentric knockouts on the side for now, and then enlarge it when I add a nipple to feed the sub panel? I will need to make a hole then anyway.