Since Class 3 control circuits permit higher allowable levels of voltage and current than Class 2 control circuits, additional _____ are specified to provide protection against the electric shock hazard.
a) circuits
b) safeguards
c) conditions
d) requirements
See answer and applicable Code reference
The correct answer is: b) safeguards
Article 725 covers remote-control, signaling, and power-limited circuits that are not an integral part of a device or appliance. As noted in the definitions section of this Article, since Class 3 circuits allow higher levels of voltage and current than a Class 2 circuit, additional safeguards are specified to provide protection from an electric shock hazard that could be encountered.
About the Author
Mike Holt
Mike Holt is the owner of Mike Holt Enterprises (www.MikeHolt.com), one of the largest electrical publishers in the United States. He earned a master's degree in the Business Administration Program (MBA) from the University of Miami. He earned his reputation as a National Electrical Code (NEC) expert by working his way up through the electrical trade. Formally a construction editor for two different trade publications, Mike started his career as an apprentice electrician and eventually became a master electrician, an electrical inspector, a contractor, and an educator. Mike has taught more than 1,000 classes on 30 different electrical-related subjects — ranging from alarm installations to exam preparation and voltage drop calculations. He continues to produce seminars, videos, books, and online training for the trade as well as contribute monthly Code content to EC&M magazine.
