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.

Code Q&A: Using the Neutral Conductor as the Circuit Equipment Grounding Conductor  1
What are the rules in using the neutral conductor for bonding of metal parts?
Code Q&A: Allowable Ampacity for Flexible Cords 
NEC rules on the ampacity requirements for flexible cords?
One-Family Dwelling Unit Load Calculations 
efore you can size the branch circuits for a dwelling, you must calculate the loads.
Stumped by the Code? NEC Requirements for a Building Service Disconnecting Means 
Q. What are the requirements for a building service disconnecting means?
Code Q&A: Equipment Terminal Ratings  5
NEC rules on the requirements for conductor sizing as they relate to equipment terminal ratings?
Code Q&A: Panelboard Overcurrent Protection  7
What are the overcurrent protection requirements for panelboards?
Stumped by the Code? NEC Requirements for Sizing Service and Feeder Conductors  1
Q. What are the rules for sizing service and feeder conductors to a single dwelling unit?
Code Q&A: Mixing Conductors from Different Voltage Systems  3
What are the rules related to the installation of conductors from different voltage systems — such as 120V, 208V, 240V, 277V, and 480V — in the same raceway or enclosure?
Components of a Solar PV System
For PV systems, a(n) _____ is a device that changes direct-current input to an alternating-current output.
Rating of Supply Conductors for X-Ray Equipment
The ampacity of supply branch-circuit conductors and the overcurrent protective devices for X-ray equipment shall not be less than _____.
Minimum Size Allowed for Fixture Wire? 1
The smallest size fixture wire permitted by the NEC is _____ AWG.
Luminaire Requirements in Class II, Division 2 Locations
Luminaires for fixed lighting in Class II, Division 2 locations shall be equipped with enclosures that are _____ or otherwise identified for the location.
Code Q&A: Sizing Bonding Jumper for Single Raceway 
What are the rules in sizing a supply side bonding jumper sized for a single raceway containing service conductors?
Minimum Clearance Requirement for Surface-Mounted Luminaire Installed in a Clothes Closet
Surface-mounted fluorescent luminaires in clothes closets shall be permitted on the wall above the door, or on the ceiling, provided there is a minimum clearance of _____ in. between the luminaire and the nearest point of a storage space.
Routing of SPD Conductors
The conductors used to connect the surge protective device to the line or bus and to ground shall not be any longer than _____ and shall avoid unnecessary bends.
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