SC Boiler Installation Practice Questions - South Carolina Boiler Installation Contractor Examination Exam

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Per 2021 IMC 1006.8, boiler control and limit devices shall interrupt which conductor, and what is required of the control-circuit disconnect?

They may break either conductor; no disconnect is required They shall interrupt the ungrounded side of the circuit, and a lockable, readily accessible means of manually disconnecting the control circuit shall be provided They shall interrupt only the grounded neutral They shall be powered at not less than 480 volts

Correct Answer:

They shall interrupt the ungrounded side of the circuit, and a lockable, readily accessible means of manually disconnecting the control circuit shall be provided

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