Which wire color in a plug acts as a safety earth conductor?

Which wire color in a plug acts as a safety earth conductor?

• A. Blue wire
• B. Green and yellow striped wire in a plug
• C. Green wire
• D. Brown wire

Answer: (B)

The main idea is that the safety earth conductor provides a protective path to ground for fault currents, keeping exposed metal parts at a safe potential and allowing the breaker to trip if something goes wrong. The wire identified by the green-and-yellow striped color is the earth conductor, and that striped pattern is how it’s distinguished from live and neutral conductors in many electrical schemes. Blue is neutral, carrying current under normal operation; brown is live, supplying voltage. While solid green has appeared in older wiring, today the standard practice is green-and-yellow stripes to clearly signal the earth connection.

The main idea is that the safety earth conductor provides a protective path to ground for fault currents, keeping exposed metal parts at a safe potential and allowing the breaker to trip if something goes wrong. The wire identified by the green-and-yellow striped color is the earth conductor, and that striped pattern is how it’s distinguished from live and neutral conductors in many electrical schemes. Blue is neutral, carrying current under normal operation; brown is live, supplying voltage. While solid green has appeared in older wiring, today the standard practice is green-and-yellow stripes to clearly signal the earth connection.