# Mike Holt

Mike
Holt
NEC Trainer / Consultant,
Mike Holt Enterprises
956

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
What are the rules for grounding and bonding service equipment?
What are the rules for installing outside branch circuits and feeders?
Though similar, single and multifamily dwellings have distinct differences.
Q. What are the basic working space requirements for electrical equipment?
What are the rules in using the neutral conductor for bonding of metal parts?
NEC rules on the ampacity requirements for flexible cords?
efore you can size the branch circuits for a dwelling, you must calculate the loads.
Q. What are the requirements for a building service disconnecting means?
NEC rules on the requirements for conductor sizing as they relate to equipment terminal ratings?
What are the overcurrent protection requirements for panelboards?
Q. What are the rules for sizing service and feeder conductors to a single dwelling unit?
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?
For PV systems, a(n) _____ is a device that changes direct-current input to an alternating-current output.
The ampacity of supply branch-circuit conductors and the overcurrent protective devices for X-ray equipment shall not be less than _____.
The smallest size fixture wire permitted by the NEC is _____ AWG.
##### Join the Discussion on EC&M Talk

last reply by in
• 1

Welcome Aboard, Derek. Ask any question and you'll get many good answers. I'm always

• 1

The Syncrude 72kV system uses a Pascor copper switch. Although it is a more expensive

• 1

In a word...yes. A transformer can only transfer power from one circuit to another

• 2

Depending on the type of utility service, the fault current stated may only be an

• 2

Wattage on your 3-phase transformer would be:
P(t) = I x E x 1.73 x PF, or

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