Black wire in electrical is a type of wiring typically used to carry current. It can be either hot (live or active) or neutral, depending on the application. The three colors present in this type of wiring are black, white, and green, with each color having its purpose. Black wires are usually hot wires that carry power from the source to the device or load. White wires are usually neutral and they return electricity to the source after use by devices or loads. Green wires act as a ground connection that safely disperses excess energy away from appliances and into the ground for protection. Always remember to consult a professional when dealing with any kind of electrical wiring project!