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March-April 2011
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TABLE OF CONTENTS

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Features

Understanding Control of Emergency Lighting Circuits

by Steve Terry, Mitch Hefter, Ken Vannice

For some time, the proper control of emergency lighting circuits has been a topic of debate for manufacturers, systems integrators, and specifying electrical engineers. Much of the debate has centered on the proper application of the many codes and standards that apply to emergency lighting. Read more


Perspectives on PV

What Hath the 2011 NEC Wrought for PV?

by John Wiles

The 2011 National Electrical Code (NEC) has been published by the National Fire Protection Association (NFPA) and is now available from numerous sources. It was adopted by some jurisdictions automatically on 1 January 2011, and will be adopted throughout the country over the next three years or even longer in some areas that are slow to change. Read more

Article 110 – Requirements for Electrical Installations

by Randy Hunter

Welcome back as we continue to discuss the 2011 National Electrical Code for the combination inspector. We are finally getting into the body of the code with Article 110, which covers the basic requirements for electrical installations and applies throughout the code, unless specifically overruled in any article in chapters 5 through 8. Some of the items covered in this article are the requirements for examination, installation and use, terminations, and access to and spaces about electrical equipment. Over the years I’ve often had inspectors and electricians ask me where in the code it states some basic rule, and more often than not it is a requirement in Article 110. Read more


Electrical Fundamentals — Basic Electric Circuit Theory

by Stephen J. Vidal

A little bit of history is in order before we get into AC and DC circuit theory. In the latter part of the 19thcentury there were three principal players in the electrical generation and transmission industry. Thomas Edison, known as the "Wizard of Menlo Park” and most famous for his invention of the electric light bulb, was the main proponent of direct current (DC) transmission. George Westinghouse and Nikola Tesla were the main proponents of alternating current (AC) transmission. History documents this formative period in the development of electrical generation and transmission as the "War of Currents.”. Read more

Electrical Inspection Code for Existing Residences

by Steve Douglas

CSA Standard C22.6 No. 1-11, Electrical Inspection Code for Existing Residential Occupancies,is a new Canadian standard developed to establish a minimum level of safety in existing residential occupancies and was published in February 2011. Read more


Responsible Electrical Safety

by Andrew Cochran

The use of electricity has inherent risks, particularly electric shock and arc flash hazard. However management tools and technology are readily available to mitigate and manage these risks. Read more

New editing and revision process will give IEEE Color Books more flexibility

by Carey J. Cook

Now that 2011 is here, you may want to make some New Year’s resolutions. Planning to volunteer? Go to the gym more often? Learn a new language? All worthy ambitions, of course, but this year, why not add some financial resolutions as well? Read more


Be Prepared for Early and Possibly Unwanted Retirement

by Jesse Abercrombie

A dairy farm in North Troy, Vermont, is using an innovative technology to convert farm waste products, such as manure, into electricity. The project was funded with assistance from USDA. Read more

New 2011 NEC Requirement Regarding Noninstantaneous Trip Circuit Breakers

by Ed Larsen

There are several requirements in theNational Electrical Code® (NEC®) that call for the total selective coordination of various systems. However, this can result in increasing the downstream arc flash hazard should energized (hot) work be required. Code-making Panel 10 (CMP-10) accepted a proposal for the 2011 NEC in an attempt to address this concern. Read more


IAEI Values Student Participation

by IAEI

"It is important for students in the electrical industry to have access to some of the most knowledgeable individuals of the electrical code in order to have a resource to ask even the basic questions,” says Dave Williams, electrical inspector in Delta Township, Lansing, Michigan. He goes on to say that "as an IAEI member you realize quickly the resources at your fingertips to address questions and solve issues; extending this resource to our student members is important to IAEI and will quickly be realized by students when they start participating in the organization.” Read more

Departments

Editorial

Stay Warm

by Kathryn Ingley

Just days ahead of Super Bowl XLV, Dallas was hit with a severe winter storm—a "blizzard” they called it—when for 103 hours the area experienced below freezing temperatures, from ½” to ¾” (12.7 to 19 mm) of ice, topped by up to 7” (175 mm) of snow, and rolling blackouts as the electrical grid threatened to crash. Schools and businesses closed to keep our citizens safe. Neighboring towns sent their emergency equipment to assist with clearing the major highways. Read more

Canadian Code

Motor Control Circuits

by Leslie Stoch

This article reviews two very essential safety requirements of the Canadian Electrical Code for motor control circuits, grounding and why it’s so significant that control circuits be prohibited for use as motor disconnecting means. Read more

Canadian Perspectives

Wet locations and isolated systems in health care facilities

by Ark Tsisserev

Let’s say, you are undertaking design and installation or inspection of such electrical installation in patient care areas of a health care facility. Do you consider certain parts of patient care areas as wet locations, and which criteria do you use for such consideration? Read more

Safety in Our States

Safety Program or Fly by the Seat of Your Pants, You Decide

by Thomas A. Domitrovich

Flying by the seat of your pants when it comes to safety is not a good idea. A good safety plan can add value to your inspection program. Whether you have your own business or work for an organization, you should realize the value of a safety program. In the last few editions of IAEI News, this column focused on the results of a questionnaire where inspectors responded to questions related to conducting the inspection. One of the questions concerned itself with what an inspector takes to the job site and what is carried during the inspection. Although not focused on safety, some of the answers were intriguing. Read more

UL Question Corner

Are there certified AFCIs that can be installed into another manufacturer’s panelboard?

by Underwriters Laboratories

Yes, UL Classifies molded-case circuit breakers, including arc-fault circuit-interrupter combination type and branch-feeder-type circuit breakers for use in other manufacturers’ panelboards under the product category Circuit Breakers, Molded-Case, Classified for Use in Specified Equipment (DIXF), located on page 99 in the 2010 UL White Book. The Guide Information can also be found online at www.ul.com/database and entering DIXF in the category code search field. Read more

UL Question Corner

Can I install a general use ordinary location ICP to control a circuit that extends into a hazardous classified location?

by Underwriters Laboratories

No, industrial control panels Listed for use in ordinary locations are Listed under the product category Industrial Control Panels (NITW), and are not intended for controlling circuits extending into a hazardous classified location. Industrial control panels (ICPs) that would be suitable for this application are Listed under the product category Industrial Control Panels Relating to Hazardous Locations (NRBX), located on page 249 in the 2010 UL White Book. Read more


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