Do I need a separate switch leg for a light and a fan in a combo fixture?
Depending on the switch type you feed the switch with the line side or hot/ black wire then the other side(s) are the switched legs that go to the light/fan. The neutral or white wire and ground don't go through the switch. The neutral and ground are usually pig tailed and run to the light/fan with the switched leg.12-3 or 14-3 with a ground will provide wires to run your light&amp;fan neutral and ground there is also 12-4 &amp; 14-4 that will allow for the 3rd device since you said triple rocker. Make sure to turn the breaker off when wiring.