Mike Holt

Mike
Holt
NEC Trainer / Consultant,
Mike Holt Enterprises
739

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
Selection of Overload Device for Continuous-Duty Motor
Part III of Article 430 focuses on motor and branch-circuit overload protection requirements.
Supplementary Overcurrent Protection
Article 240 provides the general requirements for overcurrent protection and overcurrent protective devices rated 1,000V or less, nominal.
Sizing a Supply-Side Bonding Jumper
Part V of Article 250 focuses on bonding requirements.
Locations Where NM Cable is Not Allowed
Article 334 covers the use, installation, and construction specifications of nonmetallic-sheathed cable.
Ratings of Shore Power Receptacles
Article 555 covers the installation of wiring and equipment in marinas and boatyards.
Conduit Seal Requirements in Class I, Division 1 Areas
Article 501 covers the requirements for electrical and electronic equipment and wiring for all voltages in Class I, Division 1 and 2 locations.
Code Q&A: Lockable Disconnecting Means 
Q. When the Code requires lockable disconnecting means, what does this mean?
Raceway Sizing: Getting it Just Right 
If raceway is too small, you can damage conductors while trying to pull them through. Even if they aren’t damaged during the pull, they may overheat inside an undersized raceway. For these reasons, the NEC has requirements for minimum raceway size.
Grounding Provisions for General-Use Snap Switches
The provisions for general-use snap switches are outlined in Sec. 404.9 of the 2014 NEC.
SPD Connection Requirements
Article 285 covers general requirements, installation requirements, and connection requirements for surge-protective devices (SPDs) permanently installed on premises wiring systems of 1,000V or less.
Service Conductor Clearances on Buildings
Article 230 covers service conductors and equipment for control and protection of services and their installation requirements.
GFCI Protection for Personnel
Section 210.8 of the 2014 NEC covers the requirements of ground-fault circuit-interrupter protection for personnel.
Raceway Fill Requirements for Coaxial Cables
Article 820 covers coaxial cable distribution of radio frequency signals typically employed in CATV systems.
NPLFA Circuit Power Source Requirements
Article 760 covers the installation of wiring and equipment of fire alarm systems, including all circuits controlled and powered by the fire alarm system.
Protection Requirements for Hydromassage Bathtubs
Electrical installations at hydromassage bathtubs shall comply with the provisions of Part VII of Art. 680.

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