Articles about yellow wire
Wayman in Canada asks: I need advice about fluorescent ballasts replacements. I have 3×48″T12 lamps installed in a line: one 2 tube fixture,and a single tube fixture The lamp of the single fixture will not illuminate (even after changing the tube). Can a light fixture with a electronic ballast share the same circuit with a light fixture with a magnetic one?
How to Wire a Telephone Jack: Keep in mind that a telephone only uses one pair of wires. Older telephone cables had four wires with two pairs, and the most commonly used pair was the green and red wire. The black and yellow was used for a second line.
Phone Jack Wiring Diagrams and Detailed Instructions to Help with Your Telephone Wiring – This telephone wiring diagram with photos and instructions will show you the direct steps to correctly wiring a telephone jack.