Mike Holt

Mike
Holt
NEC Trainer / Consultant,
Mike Holt Enterprises
870

Mike earned a masters 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. Since 1975, he has provided custom in-house seminars for groups such as IAEI, NECA, ICBO, IBM, AT&T, Motorola, and the U.S. Navy. 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 develop seminars, videos, books, and software as well as contributing monthly Code content to EC&M magazine.

Articles
Totally Enclosed Motors Used in Class I, Division 1 Locations
Code requirements for equipment placed in Class I locations can be found in Part III of Art. 501.
Basic Requirements for Switches, Receptacles, Cord Connectors, and Caps  1
The requirements of Art. 404 apply to switches of all types, including snap (toggle) switches, dimmer switches, fan switches, knife switches, circuit breakers used as switches, and automatic switches, such as time clocks and timers.
Stumped by the Code? Installing Circuit Conductors in Parallel in Separate Raceways 
Q. If circuit conductors are installed in parallel in separate raceways, is an equipment grounding conductor required in each raceway? If so, how do I size it?
Using Cable Tray Systems as a Means of Support
Article 392 covers cable tray systems, including ladder, ventilated trough, ventilated channel, solid bottom, and other similar structures.
LFNC Bend Requirements
Article 356 covers the use, installation and construction specifications for liquidtight flexible nonmetallic conduit (LFNC) and its associated fittings.
Receptacles in Health Care Facilities
As noted in the scope of Art. 517, "the provisions of this article shall apply to electrical construction and installation criteria in health care facilities that provide services to human beings."
Wiring for Low-Voltage Lighting Systems
Article 411 covers lighting systems and their associated components operating at 30V or less.
Wiring Methods Within Vicinity of Aircraft
Article 513 applies to buildings or structures containing aircraft fuel or where aircraft are serviced or maintained.
Fill Limitation for Surface Metal Raceway
Article 386 covers the use, installation, and construction specifications for surface metal raceways and associated fittings.
Code Q&A: Luminaires in Ducts or Hoods 
Q. What restrictions does the NEC put on the installation of luminaires in commercial cooking hoods?
Overcurrent Protection Requirements for Service Equipment
The overcurrent protection requirements for service equipment are outlined in Part VII of Art. 230.
Coaxial Cable Power Limitations
Article 820 covers coaxial cable distribution of radio frequency signals typically employed in community antenna television (CATV) systems.
Protection of Audio Equipment 2
Article 640 covers equipment and wiring for audio signal processing, amplification, and reproduction equipment.
Lampholders Near Combustible Material
Part VIII of Article 410 focuses on the installation of lampholders.
Dedicated Equipment Space Requirements
All switchboards, panelboards and motor control centers shall be located in dedicated spaces and protected from damage.
Electrical Testing Feed

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