How to connect the five colors of the bath bar, a fire wire four zero line can be connected?

1, the bath bar under the switch line ***5 wires, which all the way to lighting, all the way to exhaust, two ways to heating, ***4 wires, there is a utility line zero and the power supply zero line connected; and then the power supply a fire and zero into the switch.

2, after separating the lines, the fire wire into the switch, 4 control lines to the switch.

3, as shown in the picture: fire wire (red), zero wire (black), ground (yellow-green).

There are two output wires for 2 lighting, two output wires for 2 warming lamps, and one output wire for 1 warm air.

The one that converges to that terminal in the center of the two set screws is the zero wire.