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March-April 2003
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TABLE OF CONTENTS

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Features

Inspecting Electrical Renovations

by Frederic P. Hartwell

As buildings age, their electrical systems age with them. Renovating those older systems adds flexibility through modern wiring practice and increases safety. However, the electrical contractor and the authority having jurisdiction need to agree on the ground rules that will apply to the construction. This article has two purposes. First, it looks at some general principles of responsibility for National Electrical Code compliance in renovation projects, and then it takes a practical look at construction issues that often result in NEC application controversies during renovations. Read more

Electrical Installation Requirements for Dwelling Units

by Michael Johnston

Since 1897 the National Electrical Code (NEC), the world’s most widely used and adopted code for the built environment, has been the source for electrical installation requirements in all types of occupancies and applications, including dwelling units. The NEC was originally developed as a result of united efforts of various insurance, architectural and allied interests, and in 1911 the NFPA assumed stewardship of the NEC.Read more

The Truth About AFCIs (Part 2)

by George Gregory and Alan Manche

AFCIs are not new, but they are newly applied under the NEC rules. A variety of questions have arisen regarding where they must be applied, whether to expect unwanted operation, and how to test and service installations. This part of the two-part article answers some of those questions. Read more

Using the Electrical Inspection Manual with Checklists – A Tool for Electrical Inspections

by Jeffrey S. Sargent

Every electrical inspector has been there, the first time out to approve an electrical installation as the "authority having jurisdiction.” Realizing the importance of his or her role in the safety chain, new electrical inspectors, and for that matter all electrical inspectors, want to perform their duties with a thorough and professional approach. In most cases the electrical inspector is the independent public safety advocate with no stake in a particular project other than to ensure that the end result is a safe installation that complies with all of the applicable NEC requirements. In some cases inspectors may be working as a "clerk of the works” or project inspector for a private concern. Read more

Zone Verses Divisions

by Ken McLennan

Section 18 of the CSA Canadian Electrical Code (CE Code) covers the installation of equipment and wiring in locations considered hazardous because of the presence of ignitable or explosive materials. Such locations are divided into three classes: Class I, which contains explosive gas or vapours; Class II, which contains combustible dust; and Class III, which contains combustible fibres. Read more



Departments

Editorial

Still the Best Bang for the Buck

by James W. Carpenter

Many questions have arisen since the announcement that the IAEI Board of Directors, recognizing the need for additional revenue, voted to increase the dues to $90.00 per year effective January 1, 2003. Read more

Canadian Code

Effective Grounding and Bonding

by Leslie Stoch

This article looks at effective grounding and bonding, how it is defined by the code, and its importance to electrical safety. Read more

UL Question Corner

Does UL List light curtains that are used on industrial machinery to prevent personal injury?

by Underwriters Laboratories

Yes, light curtains are Listed under the category Active Opto-Electronic Protective Devices (NIPF), located on Page 60 of the 2002 General Information for Electrical Equipment Directory (White Book). Read more

Other Code

Sailboats in Peril Near Power Lines

by David Young

About fifteen years ago, on a beautiful Saturday in September, my then nine-year-old son and I had just finished a wonderful day of sailing. Five hours earlier, when we put in at a new boat ramp, there were very few cars with trailers in the parking lot because the stiff wind was scaring the power boaters away. When we arrived back at the ramp, the parking lot was almost full. As I pulled my boat out of the water, I had to park on the far side of the parking lot well away from the water. As I pulled into the parking space to down rig the mast, I noticed a power line between the front of my car and the adjacent roadway. The high voltage conductors seemed too low for their location adjacent to an area that the National Electrical Safety Code (NESC) would clearly define as an established boat ramp and associated rigging area. Read more


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