What are the colors sanctioned by the NEC for a 2 wire + GND for a 220V circuit? both black? red and black? white and black? or all of the above? Thanks

I just want to clarify some grounding/box fill issues regarding junction boxes. I’ll list a couple of situations and the way I think it should be grounded and the box fill. Please tell me if I’ve got the rules correct. Say you run two EMT conduits to a metal junction box. One conduit has a 240V circuit (black/black with red tape/white/green grounding) and the other conduit has two separate circuits black/white, black/white and 1 green grounding wire running through it. There are no clamps inside the box other than locknuts. Situation 1: The J-box acts only as a pull point; the wires pass through with no splices to two conduits on the other side. GROUNDING: The box does not need to be grounded since there are no splices in the box. BOX FILL: 9 since each wire counts once and the grounds are separate. Situation 2: The wires and ground from the 240V circuit pass through the J-box to another conduit as above, but the wires from the other conduit are split in the J-box so that each circuit exits in its own conduit with its own ground wire. GROUNDING: The 240V grounding wire does not need to ground to the box since it passes through. The incoming grounding wire from the conduit with 2 circuits must be spliced to the grounding wires exiting to the new individual circuits and must pigtail to ground to the box. BOX FILL: 9 since the 240V ground counts as 1 and the incoming ground from the conduit with 2 circuits counts as one, but the pigtail and two outgoing grounds spliced to it are not counted. Thanks in advance.