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.

Feeder Conductors vs Branch-Circuit Conductors  1
Article 215 covers the installation, conductor sizing, and overcurrent protection requirements for feeder conductors.
Stumped by the Code? Grounding Electrode Conductor Rules 
If more than one electrode is available, what does the Code allow for connecting one grounding electrode to another electrode?
Code Q&A: Working Space Requirements 
Does the Code allow an electrical room to be used for storage?
Code Q&A: Grounding Electrode Guidelines 
When does the Code allow the building metal structure to serve as a grounding electrode?
Code Q&A: Sizing the GEC 
What are the Code requirements for sizing the grounding electrode conductor (GEC) at a service to a rod type electrode and concrete-encased electrodes?
Stumped by the Code? Electrical Panel Working Space Rules 
What are the working space rules around the electrical panel?
Receptacles in Dwellings 
A single receptacle on an individual branch circuit must have an ampacity at least the rating of the overcurrent device
Code Q&A: Sizing Branch-Circuit Conductors  1
What is the Code requirement for sizing branch-circuit conductors?
Branch-Circuit Basics 
Understanding the branch-circuit requirements in Art. 210 is critical to completing Code-compliant installations.
Stumped by the Code? Rules for sizing transformer secondary conductors? 
What are the NEC rules for sizing transformer secondary conductors?
Code Q&A: Location of Overcurrent Protection Devices 
Where does the Code require overcurrent protection to be located in a circuit?
Code Q&A: Additional Branch Circuit Requirements for Dwelling Units  1
In addition to the general lighting circuits and those provided to supply specific loads, what other specific branch circuits are required for a dwelling unit?
Code Q&A: Determining the Minimum Number of Circuits Required 
How do you determine the minimum number of general lighting and general-use branch circuits required by the NEC for dwellings?
Article 725, Class 2 and 3 Circuits  2
If the power source is a listed Class 2 transformer or listed Class 2 power supply — or it’s in listed equipment marked to identify the Class 2 power source
Stumped by the Code? Rules for the identification of branch circuit conductors 
Q. What are the Code rules for the identification of branch circuit conductors?
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