Code Quiz of Day

Use of Type MC-HL Cable in Industrial Establishments

May 11, 2015

Article 501 covers the requirements for electrical and electronic equipment and wiring for all voltages in Class I, Division 1 and 2 locations.

Mike Holt

In industrial establishments with restricted public access where only qualified persons will service the installation, MC-HL cable is allowed to be used in a Class I, Division 1 location if it _____, and is terminated with fittings listed for the application. Such cable must comply with Part II of Art. 330.

a) is listed for use in Class I, Zone 1, or Division 1 locations
b) has a gas/vaportight continuous corrugated metallic sheath, an overall jacket of suitable polymeric material
c) has a separate equipment grounding conductor(s) in accordance with 250.122
d) all of the above

See answer and applicable Code reference

The correct answer is: d) all of the above

Article 501 covers the requirements for electrical and electronic equipment and wiring for all voltages in Class I, Division 1 and 2 locations. All three of the options shown above are noted as requirements in Sec. 501.10(A)(1)(c) of the 2014 NEC.

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.