Under normal operation, what should the state of the reverse phase alarm pilot light be?

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Multiple Choice

Under normal operation, what should the state of the reverse phase alarm pilot light be?

Explanation:
During normal operation, the reverse phase alarm acts as a fault indicator for incorrect phase sequence. If the system is supplied with the correct order and within normal limits, there is no fault to report, so the pilot light should be off. An illuminated light would signal a reverse phase condition requiring investigation of the power supply or wiring. If the alarm isn’t installed, there would be no pilot light at all, but given that this light exists, its off state in normal operation is the expected indicator.

During normal operation, the reverse phase alarm acts as a fault indicator for incorrect phase sequence. If the system is supplied with the correct order and within normal limits, there is no fault to report, so the pilot light should be off. An illuminated light would signal a reverse phase condition requiring investigation of the power supply or wiring. If the alarm isn’t installed, there would be no pilot light at all, but given that this light exists, its off state in normal operation is the expected indicator.

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