What are electrical wire color codes and what they indicates?

Red – Red wire signifies the phase in electric circuit. It is he live wire which cannot be connected to another red wire or black wire.

Black – Black wires signifies neutral wire in electric circuit. The neutral wires is connected to neutral bus bar inside an electric panel. A bus bar is and conductive metal bar that attracts the electric current for distribution purpose.)

Green – Green wire stands for grounding/ earthing in electric circuit. A green wire should be on can be connected to green wire only (no other wire).

• RED: Red wire signifies the phase in electric circuit. It is he live wire.
• BLACK: Black wires signifies neutral wire in electric circuit. The neutral wires is connected to neutral bus bar inside an electric panel.
• GREEN: Green wire stands for grounding/ earthing in electric circuit.

• Black wire: This wire is used for power supply in all circuits. Any circuits with this color is considered hot or live. It is never used for a neutral or ground wire.
• Red wire: This color wire is a secondary live wire in a 220 volt circuit and used in some types of interconnection. You can join the red wire to another red wire or to a black wire
• Blue and Yellow wire: These wires are also used to carry power but are not wiring the outlets for common plug-in electrical devices. They are used for the live wire pulled through the conduct. You will see yellow wire in the fan, structure lights, and switched outlets.
• White and Gray: This color wire is used as a neutral wire. It carries the current (unbalanced load) to the ground. You can join white and gray only to other white and gray wires
• Green: It is connected to the grounding terminal in an outlet box and run from the outlet box to the ground bus bar within an electric panel.You are welcome to read more Important Interview Questions and MCQs.