Code Quiz of Day

Branch Circuit Voltage Limitations

April 14, 2015

Article 210 covers the requirements for branch circuits.

In dwelling units, the voltage between conductors that supply the terminals of _____ shall not exceed 120V, nominal.

a) luminaires
b) cord-and-plug-connected loads of 1,440VA or less
c) cord-and-plug-connected loads of more than 1/4 HP
d) both a and b

See answer and applicable Code reference

The correct answer is: d) both a and b

Article 210 covers the requirements for branch circuits. Section 210.6 outlines the voltage limitations for branch circuits. As noted in 210.6(A)(1) and (2), "In dwelling units and guest rooms or guest suites of hotels, motels, and similar occupancies, the voltage shall not exceed 120V, nominal, between conductors that supply the terminals of luminaires and cord-and-plug-connected loads 1,440VA, nominal, or less than 1/4 HP."

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.