Mike Holt

Mike
Holt
NEC Trainer / Consultant,
Mike Holt Enterprises
874

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
Minimum Conductor Size for Equipment Operating at Less than 50V
Conductors for an appliance circuit supplying more than one appliance or appliance receptacle in an installation operating at less than 50V shall not be smaller than _____ AWG copper or equivalent.
Motor Calculations — Part 1  3
When motors start across the line, they typically draw five times the running current.
Stumped by the Code? NEC Requirements for 10-Ft Tap Rules 
Q. Please explain the 10-ft tap rules?
Mounting Height Requirement for EV Coupler
Unless specifically listed and marked for the location, the _____ of electric vehicle supply equipment shall be stored or located at a height of not less than 24 in. above the grade level for outdoor locations.
Protecting Cellular Metal Floor Raceways
Inserts for cellular metal floor raceways shall be leveled to the floor grade and sealed against the entrance of _____.
Working Space Requirements for Electric Sign Equipment
A working space not less than 3 ft high by 3 ft wide by ______ deep is required for each ballast, transformer, electronic power supply, and Class 2 power source where not installed in a sign.
Location of Emergency Controls at Attended Self-Service Motor Fuel Dispensing Facilities
The emergency controls for attended self-service motor fuel dispensing facilities shall be located no more than _____ ft from motor fuel dispensers.
Motor Calculations — Part 2  3
Correctly sizing these different devices can be confusing.
A/C Equipment Disconnecting Means Requirements
Where the air conditioner disconnecting means is not within sight from the equipment, the disconnecting means must be ______.
Definition of Child Care Facility
A child care facility is a building or structure, or portion thereof, used for educational, supervision, or personal care services for more than _____ children seven years in age or less.
Code Q&A: Rules When Mixing Conductor Types in Same Raceway 
What are the rules related to the installation of conductors under 50V with conductors from 120V, 208V, 240V, 277V, and 480V systems in the same raceway or enclosure?
ENT Marking Requirements
The _____ of conductors used in prewired ENT manufactured assemblies shall be identified by means of a printed tag or label attached to each end of the manufactured assembly.
Fulfilling Conductor Fill Requirements
When counting the number of conductors in a box, a conductor running through the box with an unbroken loop or coil not less than twice the minimum length required for free conductors shall be counted as _____ conductor(s).
Guarding of Live Parts
Entrances to rooms and other guarded locations containing exposed live parts shall be marked with conspicuous ______ forbidding unqualified persons to enter.
Identification of Grounded Conductor
Grounded conductors ______ and larger can be identified by distinctive white or gray markings at their terminations.
Electrical Testing Feed

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