A journeyperson is performing phase rotation testing on a newly installed 600 V three-phase motor feeder before connecting it to the motor. They use a phase rotation meter and measure between the three phase conductors. The meter indicates a reverse phase rotation. What is the correct action to take to correct this situation?

Question: A journeyperson is performing phase rotation testing on a newly installed 600 V three-phase motor feeder before connecting it to the motor. They use a phase rotation meter and measure between the three phase conductors. The meter indicates a reverse phase rotation. What is the correct action to take to correct this situation?

Answer options:

• Reverse the incoming line connections at the main breaker. ✅ Interchange any two of the three phase conductors at the motor or the supply end of the feeder.
• Change the overload settings in the motor starter.
• Add a capacitor bank to correct the phase angle.

Correct answer: Interchange any two of the three phase conductors at the motor or the supply end of the feeder.

Explanation: To correct reverse phase rotation in a three-phase system, it is necessary to interchange any two of the three phase conductors. This changes the sequence applied to the motor or load, causing it to operate in the desired direction. Reversing incoming lines at the main breaker affects the entire bus, which is typically not the correct approach for a single feeder, and overload settings or capacitor banks do not affect phase rotation.