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national electrical code

The Basics of Temporary Installations

Aug 1, 2010 12:00 PM, By Mike Holt, NEC Consultant

Avoiding Code violations in temporary installations...


Code Challenge

Code Quiz

Aug 26, 2010 12:07 PM, By Steven Owen

With respect to interconnected electric power production sources (Art. 705), is it required to automatically disconnect a 3-phase primary power source from all ungrounded conductors when one of the phases opens to create a loss of power on one or more phases? ...


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Code Q&A

Aug 26, 2010 12:02 PM, By Mike Holt

Q. Is the electrical wiring system used to feed ceiling fixtures allowed to be supported by the ceiling support wires?...


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The Basics of Temporary Installations 

Aug 1, 2010, By Mike Holt, NEC Consultant

Avoiding Code violations in temporary installations...

Code Quandaries 

Jul 1, 2010, By Mike Holt, NEC Consultant

Your most pressing National Electrical Code (NEC) questions answered. All questions and answers are based on the 2008 NEC...

Switchboards and Panels 

Jul 1, 2010, By Mike Holt, NEC Consultant

Understanding the requirements for switchboards and panelboards in Article 408...

Pushing for Safer Work Practices 

Jun 1, 2010, By Michael Eby, Editor-in-Chief

Overview of proposed changes to the 2012 edition of NFPA 70E, “Standard for Electrical Safety in the Workplace”...

Wiring Methods - Part 3 of 3 

May 1, 2010, By Mike Holt, NEC Consultant

Understanding the wiring method requirements of Article 314, including guidelines for conductor box fill...

The Basics of Industrial Control Panels 

May 1, 2010, By Mark Lamendola, Electrical Consultant

A closer look at NEC Art. 409, which provides the minimum safety requirements for industrial control panels...

LEDs' Dirty Little Secrets 

May 1, 2010, By Steven Bellwoar, Colonial Electric Supply and Paul Hammelef, Colonial Major Projects

Inside the obstacles for electrical contractors installing light-emitting diode (LED) technology...

Code Quandaries, May 2010 

May 1, 2010, By Mike Holt, NEC Consultant

Your most pressing National Electrical Code (NEC) questions answered. All questions and answers are based on the 2008 NEC...

Wiring Methods — Part 2 of 3 

Apr 1, 2010, By Mike Holt, NEC Consultant

Article 300 provides wiring method requirements including information on sizing and securing raceways...

Code Quandaries 

Apr 1, 2010, By Mike Holt, NEC Consultant

Your most pressing National Electrical Code (NEC) questions answered. All questions and answers are based on the 2008 NEC...

Stumped by the Code? 

Mar 25, 2010, By Mike Holt for EC&M Magazine

Your most pressing National Electrical Code (NEC) questions answered. All questions and answers are based on the 2008 NEC...

Commercial Loads — Part 2 

Mar 25, 2010, By Mike Holt, NEC Consultant

Calculating commercial receptacle loads and understanding the optional calculation method...

Wiring Methods — Part 1 of 3 

Mar 1, 2010, By Mike Holt, NEC Consultant

How to correctly install the wiring methods of Chapter 3 with the help of Article 300...

The SCCR Liability Trap 

Feb 1, 2010, By Peter R. Walsh, P.E., Ferraz Shawmut

Short circuit current rating (SCCR) requirements can be a serious liability for your company, your customer, and your supplier relations. Just knowing...

Illustrated Catastrophes 

Jan 1, 2010, By Brian J. McPartland, NEC Consultant

Whoever performed this installation must not have even known that the NEC has rules for temporary wiring....

What's Wrong Here? 

Jan 1, 2010, 

Hint: Permissible wiring methods...

Commercial Loads — Part 1 

Jan 1, 2010, By Mike Holt, NEC Consultant

The electrical load requirements for commercial installations result in a great deal of diversity in usage....

Stumped by the Code? 

Jan 1, 2010, By Mike Holt, NEC Consultant

Q. Do I need a grounding conductor for a pole light, or is the ground rod good enough? ...

Multifamily Dwelling Unit Service and Feeder Calculations 

Dec 1, 2009, By Mike Holt, NEC Consultant

How to calculate the service for a single-family or a multifamily dwelling...

Illustrated Catastrophes 

Dec 1, 2009, By Brian J. McPartland, NEC Consultant

More Code catastrophes uncovered and corrected in these faulty installations ...

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | Next

what's wrong here?

What's Wrong Here?

Aug 26, 2010 11:52 AM

What's Wrong Here?

Aug 12, 2010 12:02 PM

What's Wrong Here?

Aug 1, 2010 12:00 PM

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Power Tools

August 30, 2010

Power Tools

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Sizing Gen-Sets: Facts, Hints, and Good Judgment
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The complexities of today’s commercial or industrial facility, with their equipment environment of linear and nonlinear loads, places a whole new light on sizing engine-generator sets.

Making Dollars and Sense of Power Quality
Power quality issues cost you valuable time and money. In this webinar we will explore how power quality impacts your facility and bottom line. Understanding what it is, where to look and what you can do about it. View this On Demand Webinar!

Electric Vehicles are Coming
Automakers have started to launch new electric vehicles (EVs), or plug-in hybrid electric vehicles (PHEVs), in to the U.S. marketplace. EVs have the potential to revolutionize personal roadway transportation, and the "fuel" for this new breed of vehicles is electricity. View this On Demand Webinar!

Learn about the changes in this new code cycle by attending the premier source of NEC information and training: EC&M University's 2011 NEC Code Change Conferences. In two informative and interest-filled days, you’ll learn about major NEC changes that will impact your work, whether you’re an electrician, contractor, engineer, designer, or plant/facility maintenance professional.

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