In a transformer, which color wire is typically grounded to earth?

In a transformer, the wire that is typically grounded to earth is usually colored green. This color coding follows standard electrical wiring practices, where green is designated for grounding or bonding purposes. Grounding is crucial for safety, as it ensures that electrical faults do not pose a danger by directing excess electricity safely into the ground.

While it is true that the other colors have specific designations in electrical systems—such as black commonly used for hot or live wires, red for secondary hot wires, and white for neutral conductors—the green wire's primary role is for grounding. This distinction underscores the importance of grounding in electrical systems for protecting both equipment and individuals from electric shock and other hazards. Grounding helps create a safe path for any unintended electrical faults, preventing potential equipment damage or fire hazards.