The Grounded Neutral Conductor - Part 2 of 3
Jan 1, 2000, By James Stallcup, NEC and OSHA Consultant
The Grounded Neutral Conductor - Part 2 of 3...
Paralleling System Keeps Power Primed
Jan 1, 2000, Edited by Ellen Parson, Managing Editor
New gensets enable adhesives manufacturer to ensure reliable power, control peak demand, and save money through utility rebate program....
New Year Brings New Look to EC&M
Jan 1, 2000, By Mike Eby, Editor-in-Chief
Happy New Year! And welcome to a new century. While we survived the dreaded Y2K bug, ate too much over the holidays, and made unrealistic New Year’s resolutions,...
The Scary Post-Cat. 5 World
Jan 1, 2000, By Paul Rosenberg, Datacom Consultant
As the industry continues to struggle with a Cat. 6 standard, you’re stuck choosing between obsolete (Cat. 5), problematic (Cat. 6), and unconventional (Cat. 7) technologies....
Poor Installation Sets Off Apartment Blaze
Jan 1, 2000, By Howard Prosser, Ph.D., P.E.
Loss of normal neutral conductor forced current to seek another return path causing a transformer ground conductor to overheat and start a fire....
Correspondence Lesson 11: Building Systems Controls
Dec 1, 1999, By Paul Rosenberg, EC&M Data Consulting Editor
After a half-hour commute by train, Mary arrives at the office to begin her workday. As she approaches the building's front door, a smart security system...
Testing isolation transformers for attenuation.
Dec 1, 1999, Lewis, Warren L.
Measuring common-mode current, not voltage, will provide a real-world measure of isolation transformer attenuation.How can the performance of electrostatic...
Residential Sales Promos That Work
Dec 1, 1999, By Mark Lamendola, Technical Editor
Here's how creating your own sales promotions and packaging services can boost your bottom line....
A Closer Look at the Nature of Lighting
Dec 1, 1999, By John Pascal, EC&M Books Editor
nderstanding the basics of lighting, including color, intensity, and illuminance helps you choose the right solution for multiple applications....
Fiber Versus Copper: The Battle for Supremacy
Dec 1, 1999, By Paul Rosenberg, Datacom Consulting Editor
Will optical fibers to the desk ever see the light of day?...
Shedding New Light on Electrical Fundamentals
Dec 1, 1999, By John DeDad, Mike Eby, and Robert B. Morgan
Although pioneers like Count Alessandro Volta, Andre Ampere, George Ohm, Joseph Henry, and Michael Faraday discovered the basics of electricity centuries...
Quizzes on the Code
Dec 1, 1999, By Fred Hartwell, Hartwell Electrical Services, Inc.
Temporary Wiring -- Art. 305...
How to perform short-circuit calculations, part 2.
Dec 1, 1999, Mercede, Frank J.
Performing short-circuit calculations requires an understanding of various system components and their interaction.In Part 1 of this article, which was...
Code Quandaries
Dec 1, 1999, By Fred Hartwell, Hartwell Electrical Services, Inc.
NEC Questions from our Web site...
Grounding with the Grounded Neutral Conductor - Part 1 of 3
Dec 1, 1999, By James Stallcup, Sr., and James Stallcup, Jr.
Grounding with the Grounded Neutral Conductor - Part 1 of 3...
Is Online Shopping Secure?
Dec 1, 1999, By Mark Lamendola, Technical Editor
With discounts of 20% to 40%, buying through an Internet commerce site is an attractive option. But next comes the question everyone wants to know: Is it safe?...
What’s new at BICSI?
Dec 1, 1999, By EC&M Staff
BICSI introduces new residential cabling installation course and prepares for annual telecommunications conference....
Landmark agreement reached
Dec 1, 1999, By EC&M Staff
Member companies of the National Electrical Manufacturers Association’s (NEMA) lighting division joined energy efficiency advocates in late October to...
Reduced-Voltage Autotransformer Starter Performance Misunderstood
Dec 1, 1999, By EC&M Staff
The author of the article “Reduced-Voltage Starters: Choosing The Best Type For Your Application” (June 1998 issue) made an error with the following excerpt,...
How reliable is our electricity?
Dec 1, 1999, By EC&M Staff
According to a new report on the world’s growing dependence on electricity, the reliability of America’s power grid is increasingly threatened while the...
Bonding with signal reference grids
Dec 1, 1999, By Ken Michaels, BellSouth Communications Systems
SRGs look good on paper, but do they perform well in today's distributed network environment?...
Unconventional Transformer Connections — Part 2
Dec 1, 1999, By Scott Falke, Turlock, Calif.
Part 1 showed us how to use unconventional transformer configurations to resolve equipment availability problems and unusual circumstances. Part 2 provides more examples, and a look at the tradeoffs involved. Let's begin with Case Five....
Checking the Health of Your Rotating Machinery
Dec 1, 1999, By Joseph R. Knisley, Senior Editorial Consultant
The latest in vibration analysis tools, the Fast Fourier Transform (FFT) vibration spectrum analyzer promises accuracy improvements of up to 200%....
