Electrical Construction & Maintenance (EC&M) Magazine

Mike Holt

Articles by Mike Holt

Code Q&A

Q. What is the minimum service drop clearance above a roof?

Code Q&A

Q. Can I use aluminum rigid metal conduit in a Class 1, Div. I hazardous (classified) location?

Article 230, which consists of seven parts, provides the installation requirements for service conductors and equipment. Parts II, III, and IV address

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 3

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

EC&M Learning Center

2011 Electrician Exam Preparation Book & Journeyman Simulated Exam

Printed in full color, the 2011Exam Prep book covers Theory, Code, and Calculations in great detail. Clear colorful graphics...

2011 Understanding NEC Requirement for Solar Photovoltaic Systems

Solar power is new to most in the electrical industry and this expanding and exciting industry has created many NEC...

Photovoltaics for Commerical and Utilities Power Generation

This book provides an in-depth review of the solar industry development, and present-day state of the art, emphasizing...

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Webinars

ON DEMAND: All You Ever Wanted to Know About GFCIs & AFCIs

Abstract: In this webinar, Mike will not only explain the current NEC requirements for GFCIs and AFCIs, but he'll explain how they operate, what causes their premature failure, and when they won't provide the safety protection you might have thought they would.

Sponsored by:

ON DEMAND: Workplace Electrical Safety: Prevention before Protection

Abstract: This webinar will teach attendees the difference between risk and hazard, and how the choice of system grounding has a direct impact on reliability and safety.

Sponsored by: