It’s a sunny day on the campus of the University of California, Santa Barbara, but little light penetrates the labs and offices of Shuji Nakamura. Shades sheathe the windows in part because, Nakamura says, “I worry about unknown people around here—that they will include a spy.” That sounds farfetched until you consider that Nakamura, who [...]
(No Ratings Yet)
Heat is one of the enemies of electrical systems. As part of a larger study of elevated ambient temperatures in residential and non-residential structures in Las Vegas, Nevada, two experiments were carried out that would seem to require some action in the National Electrical Code. They involve 1) bundled cable normally found above a load [...]
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Electrical power is essential for the continued operation of various types of fire safety related equipment under fire conditions. Fire safety equipment includes fire pumps, fire alarm signaling equipment, elevators, alarms and industrial process control equipment. The National Electrical Code addresses the importance of maintaining the circuit functionality by requiring protection from potential damage by [...]
(No Ratings Yet)
Neon signs and field-installed skeleton tubing installations require a transformer or power supply to step up the voltage to a high level that will cause ignition of connected neon tubing. This transformer can be considered the “heart beat” of the neon sign or outline lighting system. Recent articles in the IAEI News have been written [...]
(No Ratings Yet)by Clive Kimblin, Eaton Cutler-Hammer It is true that code-making panel 2 has proposed revising 210.12(B) to require “an arc-fault circuit interrupter, combination type, installed to provide protection of the branch circuit.” However, we believe, that it is not true that a change to the existing Code is advisable. The need and benefit has not [...]
(No Ratings Yet)Lawyers often ask me if the particular electric supply conductors involved in an electric contact accident were in compliance with the National Electrical Safety Code (NESC) at the time of the accident. Since the code from 1990 to the present requires all existing facilities to comply with either the code in effect at the time [...]
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This article is intended to provide a preview of some of the more significant proposed changes to the 2005 NEC. This is a continuation of Part I provided in the July/August issue. It is important to understand that this summary is not intended to indicate that the Code is going to be revised as provided [...]
(No Ratings Yet)Illinois is one of the few states that has not adopted a state electrical code and does not license electricians, contractors, or inspectors. Of particular concern to members of the Suburban Division, Illinois Chapter, is the ten-year continuing debate of a state code and licensing regulations with no action. Code adoption, licensing and enforcement are [...]
(No Ratings Yet)Photoluminescent signs are no longer considered supplementary means of egress for today’s buildings; they are relied upon as the main means of egress lighting in the form of exit signs. Photoluminescent signs are glow-in-the-dark products that rely on an external light source for “charging.”
(No Ratings Yet)Question: Incandescent fixtures Type non-IC, recessed incandescent fixtures are required to be spaced a minimum of 1/2 in. from combustible materials except at points of support. Is the flange that sticks down through the ceiling that the trim mounts through considered part of the points of support?
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IAEI, as the keystone of the electrical industry, is a membership driven, non-profit association promoting electrical safety throughout the industry by providing premier education, certification of inspectors, advocacy, partnerships and expert leadership in Electrical Codes and Standards development.
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