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....
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...
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
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...
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...
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....
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...
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 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...
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?...
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...
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)...
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...
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
When installing a high-impedance grounded neutral system for a 480V, 3-phase electrical system, the following question arises. Where is the proper location for the grounding impedance (resistor)?...
