Articles about 4-wire cable
Should I add a sub panel to get more electrical circuits? Installing a New Panel for More Electrical Circuits, Why Sub Panels Require a 3-Wire Cable with a Ground Wire, 4- Wire Panels with Neutral and Ground Isolation.
Can I connect the wires together at the ceiling box rather than run two hot wires off the wall switch? Wiring Diagrams and Wire Connections for Ceiling Fans, Connecting the black wire, red wire, blue wire and the white wires.
How to Plan for a Sub Panel Installation: Planning the right amperage and cabling for a sub-panel used in a basement, garage and other locations.