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July-August 2002
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July-August 2002 CoverJuly-August 2002

TABLE OF CONTENTS

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Features

Inspections of Electrical Services

by Michael Johnston

When a building or structure is supplied with electrical power, the equipment and conductors at the point of delivery to the premises are defined by the National Electrical Code as the service. This definition reads: "Service. The conductors and equipment for delivering electric energy from the serving utility to the wiring system of the premises served.” Read more

Assisting Electrical Inspectors

by Bruce Bohren

During a visit to a new building site to inspect electrical equipment installations, an electrical inspector has the responsibility of advising the building manager that certain equipment may not comply with local codes. As a result, the building occupancy may be delayed until the matter is resolved. Read more

Protecting the Foundation of Fire-safety

by Robert Berhinig

The attack on the World Trade Center (WTC) in New York City has raised concerns among Americans regarding the fire safety of high-rise structures. Until September 11, 2001, few people envisioned the total collapse of a high-rise building except under controlled conditions such as an implosion for demolition purposes. Today, the public’s concerns are heightened. Read more

Clearances for Exposed GTO Cables and Terminations

by Les Beros

There have been numerous inquiries to my office about the requirement of increased clearances for combustible sleeving and electrode boots from conductive and combustible materials, (which equates to everything) when used with high voltage GTO cables and terminations. The growing necessity to increase the clearance requirements has brought changes to Section 34 (high voltage sign section) of the 2002 Canadian Electrical Code (CEC). Read more

Supporters of the IAEI

by Philip Cox

The IAEI is fortunate to have many supporters who willingly give of themselves to help the organization do its work better. With ever increasing cost to operate and to provide services to both members and customers, it is difficult to find the resources to do everything that should be done. Read more

Problems Confronting the Sign Industry in this Millennium

by George Doll

There have been many changes in the world of neon installations during the beginning of this millennium. These changes involve the requirements in 600.32 of the National Electrical Code. This section was created with the hopes of mechanically preventing many electrical fires that had been appearing for years. The issues and problems that have ensued are not because this is a bad section or the products in the field are flawed, but rather because of extenuating circumstances in the field. Read more

Meet the New CEO/Executive Director

by Philip Cox

It is a pleasure to introduce James Carpenter as the new chief executive officer and executive director of the International Association of Electrical Inspectors. In many cases, the outgoing person has reservations regarding the one who assumes his or her position. That are no such reservations in this transition and it is felt that the search committee made an excellent choice in the selection of Jim Carpenter and the entire IAEI Board of Directors strongly supports his appointment. Many within the electrical industry already know Jim and his proven record of achievements and those who do not know him or of his work will soon understand his value to the IAEI. Read more



Departments

Editorial

A Personal View

by Philip Cox

A successful organization must be capable of adjusting to meet changing circumstances. The IAEI has been able to meet challenges placed on it and to grow within the electrical industry, especially in the area of electrical safety. While not having the resources to meet every challenge it faces or to address every need it recognizes, the organization has progressed to become an important part of the electrical safety community. This has been made possible by hard work and leadership provided by many key people in the organization as well as the support and participation of other faithful and dedicated members. Read more

Canadian Code

Recessed Lighting

by Leslie Stoch

There is an increased fire hazard when recessed lighting fixtures having external temperatures in excess of 90ºC are installed in contact with thermal insulation or combustible materials. Lighting fixtures may overheat when blanketed with thermal insulation unless they have been tested, approved and marked for such use. Fire may result when there is contact with combustible materials. Fixtures used in this way may have thermal protective devices to prevent overheating or be designed in a way so as to prevent dangerous external temperatures. For the same reasons, fixtures are also usually marked for use with maximum wattage lamps. Read more

Other Code

Conductor Hyperthermia

by David Young

In the article titled, "Overhead Line Design From Scratch — Part 1? in the March/April 1998 issue of IAEI News, I discussed aerial conductor choice based upon steady-state ampacity, maximum operating temperature, and the sag/tension characteristics of the conductor at the maximum operating temperature. During the operation of the line, if we allow the conductor temperature to exceed the maximum operating temperature used to design the line, the conductor clearances may violate the National Electrical Safety Code (NESC) minimums and the conductor can be permanently damaged. This damage is loss of strength due to annealing of the conductor. Depending upon how closely the line is designed to the NESC maximum conductor tensions, conductor loss of strength can also violate the strength requirements of the NESC. So, why would anyone intentionally exceed the design maximum operating temperature? Read more

Ask CSA

A Study in International Standards Harmonization

by CSA Group

In 1992, CANENA (a Spanish acronym for Council for Harmonization of Electrotechnical Standards of the Nations of Americas) was created as a forum to harmonize standards and promote the reduction of non-tariff trade barriers for electrotechnical products between Canada, Mexico, and the United States of America. Read more

UL Question Corner

Is a meter socket with a marked rating of 160A/ 200A max intended to be installed on a 160 A or 200 A circuit?

by Underwriters Laboratories

A meter socket rated 160 A/ 200 A is intended for a continuous load of 160 A or a maximum non continuous load of 200 A. These products are Listed under the category Meter Sockets (PJYZ). Read more


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