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.

Laundry Circuit Load Calculations
Feeder and service load calculation requirements can be found in Part III of Art. 220 in the 2014 NEC.
Code Q&A: Grouping of Neutral Conductors  6
Q. When multiple branch circuits are present in an enclosure, what does the Code require in regard to grouping of neutral conductors?
Defining Objectionable Current
The topic of objectionable current is covered in Sec. 250.6 of the 2014 NEC.
Securing and Supporting PVC
Article 352 covers the use, installation and construction specifications for rigid PVC and its associated fittings.
Electric Sign Disconnects
Article 600 covers the installation of conductors, equipment, and field wiring for electric signs and outline lighting.
Fire Rating of Door Leading to Transformer Vault
Article 450 outlines the installation requirements for transformers and transformer vaults.
Electric Sign Wiring Requirements
National Electrical Code quiz question on electric sign requirements.
Service Conductor Markings
Article 230 outlines the requirements for service conductors and equipment for control and protection of services.
Mobile Home Feeder Capacity
Part III of Art. 550 covers the service and feeder requirements for mobile and manufactured homes.
PV Equipment Grounding Conductors
The grounding requirements for solar photovoltaic (PV) systems are outlined in Part V of Art. 690.
Grounding Requirements for Conductor Enclosures & Raceways
Part IV of Art. 250 covers the bonding and grounding requirements for enclosures, raceways, and service cable connections.
Conductor Clearances to Portable Structures
Article 525 covers the installation of portable wiring and equipment for carnivals, circuses, fairs and similar functions.
Selection of Ampacity
Section 310.15 outlines the requirements for the ampacities of conductors rated between 0V and 2,000V.
Motor Terminal Torque Requirements
Article 430 covers the requirements for motors, motor circuits and controllers.
Code Q&A: Poles Supporting Luminaires  1
Q. What are the NEC rules regarding poles used to support luminaires?
Electrical Testing Feed
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