Code Quiz of Day

How Many Supplies are Allowed?

June 23, 2015

A building or structure shall be supplied by a maximum of _____ feeder(s) or branch circuit(s), unless specifically permitted otherwise.

Mike Holt

A building or structure shall be supplied by a maximum of _____ feeder(s) or branch circuit(s), unless specifically permitted otherwise.

a) one
b) two
c) three
d) four

See answer and applicable Code reference

The correct answer is: a) one

Article 225 covers requirements for outside branch circuits and feeders run on or between buildings, structures or poles on the premises. As noted in the first paragraph of Sec. 225.30, "A building or other structure that is served by a branch circuit or feeder on the load side of a service disconnecting means shall be supplied by only one feeder or branch circuit unless permitted in 225.30(A) through (E)."

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.