Articles about wires in junction box
How to Wire a Junction Box: Selecting a Junction Box for Electrical Wiring, The Basics of Electrical Junction Boxes, The number of wires that are allowed in a Junction Box.
How do I disconnect the electrical wires and leave them in the panel for future use? Disconnecting Unused Electrical Wires, How to Keep Spare Electrical Wiring Safe for Future Use.
Can more than one circuit be run through a single junction box? Junction Box Wiring and Multiple Circuits.