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.

Stumped by the Code? 1
All questions and answers are based on the 2005 NEC. Q. Are there any restrictions on the length of outside conductor (without overcurrent protection)
Code Q&A
Q. Can the disconnect switch be located next to equipment installed above an accessible drop ceiling, or must the switch be installed at a readily accessible location?
Code Q&A
Q. In a dwelling unit, what are the receptacle requirements for island counter tops?
Article 225: Outside Branch Circuits 5
Article 225 provides installation requirements for outside branch circuits and feeders that run on (or between) structures or poles (Fig. 1). The NEC
Code Quandaries
Q. Can I pass conductors from one panel through another panel? If so, what are the restrictions?
Code Q&A
Q. What are the requirements for supporting outlet boxes above/to suspended ceilings?
Code Q&A
Q. When a lighting and appliance panelboard is fed from the secondary of a 3-phase transformer, is the panelboard required to have a main breaker installed in it?
Article 215: Feeders
Last month, we looked at branch-circuit requirements in Art. 210. The next logical step up from the branch circuit is the feeder circuit. Thus, Art. 215,
Code Quandaries
All questions and answers are based on the 2005 NEC. Q. Since the neutral is bonded to the case at the meter enclosure, do I still need to bond the neutral
Code Q&A
Q. Can I install conductors from different panels in the same raceway?
Code Q&A 1
Q. Can I connect a range hood in a dwelling unit kitchen to the small appliance circuit? A. No. The 20A, 120V small-appliance circuit is only permitted to supply the receptacle outlets as per 210.52(B) . However, range hoods can be hardwired to a 15A or ...
Branch Circuits - Part Two
Article 210 provides GFCI requirements in 210.8 and AFCI requirements in 210.12. These requirements apply to 125V receptacles rated at 15A or 20A (circuits
Code Q&A
Q. I was told that I’m not allowed to install bedroom lights on an AFCI circuit. Is this true? A. No. All 15A or 20A, 120V branch circuits that supply outlets (including lighting and smoke alarm) in dwelling unit bedrooms must be protected by a listed ...
Code Q&A
Q. Can I secure signal or communications cables to ceiling-support wires or ceiling grid? A. No. Ceiling-support wires and ceiling grids are not permitted to support raceways and cables. In this situation, you must provide independent support wires ...
Top 50 NEC Rules
To remove dangerous voltage on metal parts from a ground fault, electrically conductive metal water piping systems, metal sprinkler piping, metal gas piping, and other metal piping systems, as well as exposed structural steel members that are likely to ...

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