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.

AC Systems Not Required to be Grounded
Section 250.21 focuses on alternating-current systems of 50V to less than 1,000V that are not required to be grounded.
Insulation Rating of Conductor Used in Lighting Equipment
Conductor construction and application rules are outlined in Table 310.104(A) through Table 310.104(E) of the 2011 NEC.
Personnel Protection of Impedance Heating Systems
The requirements of Art. 426 apply to electrically energized heating systems such as fixed outdoor electric deicing and snow-melting equipment.
Inspection of Manufactured Wiring Assembly
The requirements in Art. 602 apply to field-installed wiring using off-site manufactured subassemblies for branch, remote-control, signaling and communication circuits in accessible areas.
Code Q&A: Connection of Appliances  1
Q. What is the general rule that limits the use of flexible cords for the connection of appliances?
Allowable Conductor Ampacity for Generator
Article 445 contains installation and other requirements for generators.
One Permitted Use of Nonmetallic Wireway
Article 378 covers the use, installation, and construction specifications for nonmetallic wireways and associated fittings.
Kitchen Equipment Load Calculations
Section 220.56 of the NEC addresses kitchen equipment installed in locations other than dwelling units.
Approved Uses of Flat Cable Assemblies
Article 322 covers the use, installation, and construction specifications for flat cable assemblies.
Phase Converters and Fire Pumps
Article 695 covers the installation of electric power sources and interconnecting circuits, and switching and control equipment dedicated to fire pump drivers.
Know Your Definitions
Article 100 lists definitions that are essential to proper application of the NEC.
Enclosure Requirements in Class III Locations
Article 503 covers the requirements for electrical and electronic equipment wiring for all voltages in Class III, Division 1 and 2 locations.
Permitted Uses of PVC
Article 352 covers the use, installation, and construction specifications for rigid polyvinyl chloride conduit and associated fittings.
Lighting Outlet Requirements in Hotels or Motels
Lighting outlet requirements for hotels and motels are outlined in Sec. 210.70 of the NEC.
Interconnected Electric Power Production Sources
Article 705 covers installation of one or more electric power production sources operating in parallel with a primary source(s) of electricity.
Electrical Testing Feed
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