Which color is typically used for the neutral wire in a mains cable?

Which color is typically used for the neutral wire in a mains cable?

• A. Blue
• B. Brown
• C. Green and Yellow
• D. Red

Answer: (A)

Blue is used for the neutral wire because mains wiring follows a color code to show each conductor’s role. The neutral provides the return path for current and is kept near earth potential for safety, so it’s colored blue in modern standards. Live (or phase) wires are brown, and earth is green/yellow, making it easy to identify which conductor is which. In older systems, different colors were used (like red for live or black for neutral), but today blue specifically identifies the neutral. This helps ensure connections are made correctly and safely.

Blue is used for the neutral wire because mains wiring follows a color code to show each conductor’s role. The neutral provides the return path for current and is kept near earth potential for safety, so it’s colored blue in modern standards. Live (or phase) wires are brown, and earth is green/yellow, making it easy to identify which conductor is which. In older systems, different colors were used (like red for live or black for neutral), but today blue specifically identifies the neutral. This helps ensure connections are made correctly and safely.