Mike Holt

NEC Trainer / Consultant,
Mike Holt Enterprises

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.

Disconnecting Means Requirements for X-Ray Equipment
Article 660 covers all X-ray equipment operating at any frequency or voltage for industrial or other non-medical or non-dental use.
Thermal Protection of Fixed Electric Heating Equipment
Article 427 requirements apply to electrically energized heating systems and the installation of these systems used with pipelines or vessels.
Temporary Wiring in Assembly Occupancies
Article 518 covers the requirements for all buildings or portions of buildings where people gather for purposes such as deliberation, worship, entertainment, eating, drinking, amusement, awaiting transportation, or similar purposes.
Bend Radius Restrictions for Type MC Cable
Article 330 covers the use, installation, and construction specifications of metal-clad cable, Type MC.
Code Q&A: Use of Flexible Cords 
Q. What is the general rule that limits the use of flexible cords for the connection of appliances?
Minimum Length of Ground Rod Used With Communications Systems
Grounding methods for communications systems are outlined in Part IV of Art. 800.
Back-fed Circuit Breakers in PV Systems
Article 690 requirements apply to solar PV systems.
Bonding of Conductive Materials and Equipment
The general requirements for bonding and grounding electrical systems are outlined in Sec. 250.4 of the NEC.
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 1
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.
Electrical Testing Feed

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