Feeder Taps 

Jan 1, 2008, By Mike Holt, NEC Consultant

Sometimes, it makes sense to tap into a feeder conductor to power another conductor. From Art. 100, we know that a feeder conductor runs between service...

AFCI Article Sparks Reader Debate 

Jan 1, 2008, 

Your magazine is very informative. I would like to comment on the article by Gerald Winstanley from NEMA, starting on page C34 of the November 2007 issue....

Illustrated Catastrophes 

Dec 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...

Article 708: Critical Operations Power Systems 

Nov 1, 2007, By Michael A. Anthony, P.E., University of Michigan; Robert G. Arno, EYP Mission Critical Facilities

Focusing on the complex interplay among mechanical and electrical systems needed to support critical infrastructure, Art. 708 is one of four new Articles...

Code Changes 2008 

Nov 1, 2007, By Mike Holt, NEC Consultant

It's hard to believe it's that time again, but the 2008 NEC is upon us. In this latest Code cycle, the Code Making Panels (CMPs) sifted through 3,688...

Illustrated Catastrophes 

Nov 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...

Top 50 NEC Rules 

Oct 26, 2007, By Mike Holt

Illustrated Catastrophes 

Oct 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...

Making Amendments 

Oct 1, 2007, By Beck Ireland, Staff Writer

Although the three-year Code-making cycle for the 2008 edition of the National Electrical Code (NEC) recently closed, the dust has not yet settled on...

Article 240: Overcurrent Protection 

Oct 1, 2007, By Mike Holt, NEC Consultant

Article 240 provides the requirements for selecting and installing overcurrent protection devices (OCPDs). Depending on your application, other Articles...

SHOCKING STAT OF THE MONTH 

Oct 1, 2007, 

25% Percentage the Department of Homeland Security has indicated it will raise civil fines imposed on employers who knowingly hire illegal immigrants....

Code Quandaries 

Sep 1, 2007, By Mike Holt, NEC Consultant

All questions and answers are based on the 2005 NEC. Q. Can Type MC cable be installed from fixture to fixture without support above a suspended ceiling?...

Article 230: Services Part 2 

Sep 1, 2007, By Mike Holt, NEC Consultant

Part 1 of this two-part series, which ran in last month's August issue, explored how to ensure your service entrance equipment meets Code. Starting with...

Illustrated Catastrophes 

Sep 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...

Article 230: Services Part 1 

Aug 1, 2007, By Mike Holt, NEC Consultant

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? 

Aug 1, 2007, By Mike Holt, NEC Consultant

All questions and answers are based on the 2005 NEC. Q. Are there any restrictions on the length of outside conductor (without overcurrent protection)...

Illustrated Catastrophes 

Aug 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...

Article 225: Outside Branch Circuits 

Jul 1, 2007, By Mike Holt, NEC Consultant

Article 225 provides installation requirements for outside branch circuits and feeders that run on (or between) structures or poles (Fig. 1). The NEC...

Code Q&A 

Jun 13, 2007, By Mike Holt

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?...

Code Quiz 

Jun 13, 2007, By Steven Owen

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