ECM Buyers' Guide

national electrical code


Article 215: Feeders 

Jun 1, 2007, By Mike Holt, NEC Consultant

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,...

Eyes Wide Open 

Jun 1, 2007, By Michael Eby, Editor-in-Chief

I just returned home from a visit to the great city of Boston. Although I didn't get to walk down The Freedom Trail or stop in The Paul Revere House,...

Illustrated Catastrophes 

Jun 1, 2007, By Joe Tedesco, NEC Columnist

As usual, never consider the following commentary associated with these photos as a formal interpretation of the National Electrical Code (NEC). Without...

What's Wrong Here? 

Jun 1, 2007, By Joe Tedesco, NEC Columnist

How well do you know the Code? Think you can spot violations the original installer either ignored or couldn't identify? Here's your chance to moonlight...

Code Quandaries 

Jun 1, 2007, By Mike Holt, NEC Consultant

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 Quiz 

May 29, 2007, By Steven Owen

What is the minimum size and metal thickness required for a junction box constructed of sheet steel, with one 4-inch RMC conduit (per wall) connected on opposite walls of the box (i.e., directly across from one another)?...

Code Q&A 

May 29, 2007, By Mike Holt

Q. Can I install conductors from different panels in the same raceway?...

Code Quiz 

May 14, 2007, By Steven Owen

Code Q&A 

May 14, 2007, By Mike Holt

Code Quiz 

Apr 27, 2007, By Steven Owen

Code Q&A 

Apr 27, 2007, By Mike Holt

Code Quiz 

Apr 13, 2007, By Steven Owen

Code Q&A 

Apr 13, 2007, By Mike Holt

Top 50 NEC Rules 

Apr 13, 2007, By Mike Holt

Branch Circuits - Part One 

Apr 1, 2007, By Mike Holt, NEC Consultant

Article 210 contains the requirements for conductor sizing, conductor identification, overcurrent protection, and GFCI and AFCI protection of branch circuits....

What's Wrong Here? 

Apr 1, 2007, 

Code Quiz 

Mar 27, 2007, By Steven Owen

Code Q&A 

Mar 27, 2007, By Mike Holt

Code Quiz 

Mar 13, 2007, By Steven Owen

Code Q&A 

Mar 13, 2007, By Mike Holt

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product spotlight

Toroidal power transformers

Feb 8, 2012 8:39 AM

Toroidal power transformers

These toroidal power transformers are designed for medical applications...

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Arlington CP9000

Arlington's new 9" diameter ceiling cover plate is the neatest way to cover unused "high hat" cans. With no tools needed, installation couldn't be faster!...

Arlington Gangable Boxes

Designed for new or retrofit applications, these snap-together gangable plastic boxes eliminate the need to construct a multiple-gang steel box out of several individual ones...

Understanding NEC Requirements for Solar Photovoltaic Systems
During this session, Mike Holt will address possible conflicts or confusing NEC requirements, provide tips on proper electrical installation techniques, and discuss the dangers related to improper installations. View this On Demand Webinar!



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