In the 2011 NEC ROP process, two proposals were submitted and accepted that required the marking of the amount of available fault current on service equipment or enclosures that contain service or feeder overcurrent protective devices.
(No Ratings Yet)
Inspectors and installers continue to puzzle over the requirements in Section 690.64 of the NEC that apply to the connection of utility-interactive inverters to the premises wiring and finally to the utility. This article, using the simplified block diagram will attempt to clarify some of those requirements.
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In this article the reader will see how the modest beginnings of modern light sources have evolved, how lighting has become not only a constant companion but has turned the night into day. We will look at what the lighting industry has achieved to date, and how it has evolved to meet an ever-increasing demand.
(No Ratings Yet)In all of my years working with electrical professionals I’ve yet to meet someone who likes paying taxes. We all know that it’s a part of life but it seems that the more successful we become and the older we get, it becomes more of an issue. Many people I work with benefit from investing [...]
(No Ratings Yet)
Ground-fault protection of electrical equipment is required by the National Electrical Code (NEC) in order to minimize the damage to the equipment in the case of a ground fault.
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The increasing number of photovoltaic (PV) system installations has prompted questions regarding whether or not circuit breakers with ground-fault protection for equipment (GFPE) can be backfed. This article will address this question, not only for PV applications, but for any application where it is desired to backfeed a circuit breaker that incorporates GFPE.
(No Ratings Yet)
Article 90 is rarely given consideration when someone references the National Electrical Code (NEC). However, this is where we find the purpose statement for this code, and it shapes the entire application and enforcement of the requirements in the NEC.
(1 votes, average: 5.00 out of 5)It is hard to believe, but 2010 is almost over and with it, my term as IAEI International President is drawing to a close. As I prepare to pass the gavel to our First Vice President Chuck Mello, I would like to express my gratitude to all of the membership for the honor of serving the association as the 82nd IAEI International President.
(No Ratings Yet)
There are a variety of technologies and methods used to test the insulation of wire and cable, including high-potting, very low frequency (VLF), power factor, partial discharge, time-domain reflectometry (TDR), and “thumping.” Like a visit to the doctor’s office, each test examines the test item in a different way and looks for a different response [...]
(No Ratings Yet)
Letters to the Editor When it comes to terminating electrical conductors, Ms. Hunter’s field study, “The Difference between Success and Failure: How a Torque Wrench Improves System Reliability” published in July/August 2010 issue of IAEI News, demonstrates the importance of doing it right the first time.
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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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