Does It Matter Which Black Wire Is Used
From the switch black wires connect up to an electrical outlet and serve as hot wires. The color convention I speak of is Black-Red Black-Red-Blue for 3-phase. Electrical Wire Color Codes Wiring Colors Chart Electrical Wiring Electrical Wiring Colours Home Electrical Wiring In 122 102 and 82 cables both wires are hot and carrying 240 volts between them with the white neutral line absent. . Considering conventional charge flow its been true since the beginning of time that a red jacket indicates that that wire is connected to the positive terminal of the DC power supply which bleeds and a black jacket indicates that that wire is connected to the negative terminal of the DC supply - the color of earth to which blood returns. The green wire is attached to Ground GND. Always assume black wires are live. The black wire should be the hot wire and the white wire should be the neutral wire. But you SHOULD use black for ground and ...