Mike Holt

Mike
Holt
NEC Trainer / Consultant,
Mike Holt Enterprises
767

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
Marking Requirements for Circuit Breakers Used as Switches
Parts I through VII of Art. 240 provide the general requirements for overcurrent protection and overcurrent protective devices not more than 1,000V, nominal.
Approved Wiring Methods in Ducts
Article 300 covers the general requirements for wiring methods for all wiring methods, unless modified by other Articles in the Code.
Types of Approved Motor Disconnecting Means
Part VIII of Article 430 is specific to motor control centers.
Use of Isolated Ground Receptacles
The provisions of Art. 517 apply to construction criteria in health care facilities that provide services to human beings.
Antenna Conductor Mounting Requirements
Article 810 covers the installation requirements for radio and television equipment.
Code Q&A: Sizing a Grounding Electrode Conductor  2
Q. How is the grounding electrode conductor (GEC) sized when it’s to be connected to a concrete-encased electrode?
Approved Wiring Methods for PV Systems
Part IV of Article 690 focuses on approved wiring methods for PV systems.
Is This a Bonding Jumper?
Article 250 covers the general requirements for bonding and grounding electrical installations.
Vertical Support Requirements for Nonmetallic Wireways
Article 378 covers the use, installation, and construction specifications for nonmetallic wireways and associated fittings.
Portable Conductor Requirements for Stage Equipment
Part V of Article 520 of the NEC focuses on portable stage equipment other than switchboards.
LFMC Wiring Methods
Article 502 covers the requirements for electrical and electronic equipment and wiring for all voltages in Class II, Division 1 and 2 locations where fire or explosion hazards may exist due to combustible dust.
Working Space Height Requirements
Section 110.26 outlines the access and working spaces that shall be maintained about all equipment.
Required Outlets at Countertop Spaces
Article 210 covers branch circuits, except for branch circuits that supply only motor loads.
Cable Types Suitable for Use in Ducts and Plenums
Article 725 covers remote-control, signaling, and power-limited circuits that are not an integral part of a device or appliance.
Box Sizing Tips  1
So you go through all that work to correctly size your raceway, only to find out during the acceptance inspection that you have to replace some boxes and re-pull all of the conductors.
Electrical Testing Feed

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