NM CID ES-3 Practice Questions - New Mexico CID ES-3 Low Voltage Special Systems (Under 50 Volts) Examination Exam

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A Class B initiating-device circuit is typically supervised by an end-of-line device. A Class A initiating-device circuit is different because it:

Needs no supervision May be wired with doorbell wire in a plenum Returns to the control unit so a single open leaves devices still operable via the alternate path Operates only on 120-volt NPLFA power

Correct Answer:

Returns to the control unit so a single open leaves devices still operable via the alternate path

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