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March-April 2006
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March-April 2006 CoverMarch-April 2006

TABLE OF CONTENTS

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Features

Isolated Grounding Receptacle Circuits – Got Clean Grounds or Dirty Grounds?

by Michael Johnston

Clean power is the objective, but what about noise on the equipment grounding conductor and other grounding paths? How "clean” is your isolated (insulated) equipment grounding circuit? Chances are if you’ve been involved in the electrical field, you’ve had experiences either installing or inspecting isolated (insulated) equipment grounding circuits and receptacles. Read more

Perspectives on PV

* PV Plan Check

by John Wiles

Electrical inspectors and electrical permitting personnel are seeing increasing numbers of photovoltaic (PV) power systems, both at the permitting stage and at the initial inspection. Both processes go much more smoothly for all concerned when the electrical system is properly documented. Since the typical PV installer has not installed hundreds of the same PV system, and the inspector has not seen hundreds of these systems, the documentation for these systems must, by necessity, be somewhat more detailed than the documentation associated with a typical residential electrical system. This article will examine a typical residential, utility-interactive PV system in terms of a package that should be submitted by the installer when applying for a permit or discussing the system with the inspector prior to installation. Installers can use this material to develop the package. Read more

Ground Rod Electrodes – What You Need to Know

by Jim Lund

There are several misconceptions with interpretation of the National Electrical Code as it relates to ground rod electrode compliance. The section of the NEC that deals with ground rods is 250.52. The wording of this portion of the Code presently includes conflicting terms, dimensions and interpretations, which hopefully will be addressed in the next code proposal cycle. Read more

New Orleans: An Inspector’s First Impression

by Bill McGovern

They say a picture is worth a thousand words, but a thousand pictures could not have prepared me for the devastation I would see in the following weeks. New Orleans has not only suffered the ravages of Hurricane Katrina, but has been inundated by floodwaters after several of the levees failed, flooding 75 percent of the city. Some of those who were lucky enough to have survived with minimal initial damage, suffered severe flood damage after they thought the worst had passed. Floodwaters rose to levels as high as 14’, submerging electrical wiring and equipment, and failed to recede for several weeks. Read more

Inspecting an Automotive Service Lift

by Dale W. Soos

Your day starts with an early morning phone call: "Hi, This is Phil’s Auto Repair on Chestnut Street. What information do you need to have a permit drawn for installing an automotive service lift?” Your first thought, as an electrical inspector, is to ask, "Is it listed?” You are assured it is, so a permit for the installation is filed, and a final inspection is scheduled. When you arrive for the inspection, the building owner proudly shows off his new lift, and points to the "listing” mark on the lift motor. Read more

Taking Time Out from Investing Can Be Costly

by Jesse Abercrombie

The life of a contractor requires taking breaks from time to time. Each day it is critical to take a one-hour break to get away from the bidding and the day-to-day frenzy. It’s also a good idea to take a break at least once a year so that you’re able to refresh and replenish. But when it comes to financial planning, is it a good idea to take a break or time out? Not so. If you’ve been investing over the past decade, you probably have good reason to be confused about the stock market’s performance. Read more

Departments

Editorial

Growing the Membership

by James W. Carpenter

By now, March 2006, all your good intentions and New Year’s resolutions probably have been forgotten. Well, maybe not all. Hopefully your resolution to be more involved in your profession by continuing your education, upgrading your skills, and increasing your knowledge is still a priority for you. That is where IAEI should be in your plans. IAEI provides many opportunities for you to advance your goals. IAEI also provides a place for you to hone your leadership and communication skills. Read more

Canadian Code

CEC Method of Grounding

by Leslie Stoch

It goes without saying that correct grounding is vital to minimizing the risks of electrical fire or explosion and risks to personal safety. This article reviews some of the grounding methods permitted by the Canadian Electrical Code, their advantages and limitations, and reviews the model for effective grounding. Read more

Canadian Perspectives

Emergency systems in the CE Code – food for thought and discussion

by Ark Tsisserev

Section 46 of the Canadian Electrical Code, Part I governs installation, operation and maintenance of emergency systems. However, the scope of this section might be a bit confusing to some Code users. The scope states that rules of Section 46 apply "to emergency systems intended to supply power, in the event of failure of the normal power supply, where required by the National Building Code of Canada” Read more

Other Code

The 2007 NESC – Part 1

by David Young

The National Electrical Safety Code® (NESC®) is presently being revised on a five-year cycle. The 2007 edition will be published and available for purchase on August 1, 2006. The NESC is published by the Institute of Electrical and Electronics Engineers (IEEE). The 2007 edition shall become effective no later than 180 days following the publication date. For the 2007 cycle, 297 change proposals were submitted by the July 17, 2003, deadline. In October 2003, the seven NESC subcommittees met to consider the change proposals. Read more

UL Question Corner

Is it permitted to paint the face of a receptacle to match the paint in a room?

by Underwriters Laboratories

Receptacles are Listed under the category Receptacles for Plugs and Attachment Plugs (RTRT), located on page 109 in the 2005 White Book. Receptacles Listed under this category are evaluated for compliance with the Standard for Receptacles for Plugs and Attachment Plugs, UL 498. Read more

UL Question Corner

Can a Listed panelboard be retrofitted into an existing cabinet that may be cemented into an existing wall?

by Underwriters Laboratories

Panelboards are Listed under the category Panelboards (QEUY) located on page 92 in the 2005 UL General Information Directory for Electrical Equipment, the White Book. The Guide Information for QEUY states panelboards are intended for mounting in cabinets or cutout boxes, which may be provided with the panel or provided separately. Only panelboards marked to indicate that they are for use in a specific box and panelboards labeled as ‘‘Enclosed Panelboards’’ have been investigated to determine that box wiring space is adequate. Read more

UL Question Corner

I know that UL provides strong support for the IAEI at section meetings, but what support do you provide for IAEI divisions or chapters?

by Underwriters Laboratories

UL and the IAEI work together on a common public safety goal. As you noted this is done in a number of ways, including providing technical support at all the section meetings, not merely attending and providing cute trinkets as handouts. We also publish technical articles for IAEI News as well as this column, provide complimentary White Books and other technical aides and support the IAEI in many other fashions. Read more


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