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Apprentice answer

Can a fire/smoke damper actuator burn out if line voltage is wired to the wrong motor

3rd YearDampers, Fire/Smoke & Life SafetyCheck first

Damper actuators are voltage-specific. If the wrong voltage hits the actuator, stop testing, document it, replace only with approved parts, and have electrical/controls correct the power source.

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Plain-English answer

A fire/smoke damper actuator is not universal. If line voltage is connected to a low-voltage actuator, the motor can burn out immediately.

Stop testing and do not keep cycling it. Verify the actuator label/submittal, control voltage, transformer, wiring responsibility, and replacement requirements. Life-safety actuators should be replaced and tested per manufacturer and commissioning procedure.

Ask Foreman

The FSD actuator at [tag/location] appears to have been hit with the wrong voltage. I checked the label/submittal. Do you want electrical/controls to correct power before we install a replacement actuator?

Verify before acting

Use this as training guidance. Foreman direction, approved drawings, project specs, manufacturer instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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