Solving SCR Line Voltage Notching
Sep 1, 2000, By John A. Houdek, MTE Corp.
To solve 3-phase voltage notching problems, use a 3% impedance reactor....
Fascination with Fuel Cells
Sep 1, 2000, By Michael Eby
I admit it. I'm fascinated with fuel cell technology. Call me a technical geek, but I just can't help myself. The applications for these devices seem...
The Hot Issue of Motor Temperature Ratings
Sep 1, 2000, By Ed Cowern
When you specify a motor, how do you know it can take the heat?...
Code Quandaries
Sep 1, 2000, By Mike Holt
Here are the latest short answers to questions posted on our Web site. In our discussion, we will cover topics from Secs. 250-30, 250-50, 250-52, 300-22(d),...
Not All Ground Rods Are Created Equal
Sep 1, 2000, By John Paschal
Knowing what types of ground rods are available as well as understanding how they work and interact with different soil conditions help you prevent grounding problems....
Under the Magnifying Glass
Sep 1, 2000, By Marleen Canniff
Taking a close look at a motor's stator during condition-based maintenance keeps power running at capacity at this busy power plant. When the condition-based...
Lead-Acid and the Environment: a Battery of Concerns
Sep 1, 2000, By William Foist
Battery storage can present serious environmental problems and safety concerns. How you deal with them has a direct impact on your company's bottom line....
Test Your Motor Control IQ
Sep 1, 2000, By Larry Baran
This quiz will help test your knowledge of a duplex pump controller circuit and better prepare you for your next troubleshooting challenge....
Adjusting Labor Units the Smart Way
Sep 1, 2000, By Mike Holt
Understanding how different job conditions affect total labor hours on any project goes a long way when it comes to successful estimating....
Copper or Aluminum Lugs: How Should You Decide?
Sep 1, 2000, By John Paschal, P.E.
Does spending more money for copper lugs offer extra security and reduced maintenance?...
Cable Termination Practices Simplified
Sep 1, 2000, By Paul Rosenberg
Proper cable termination practices are vital for the complete and accurate transfer of both analog and digital information signals....
Troubleshooting Plant Floor Datacom Systems
Sep 1, 2000, By Ralph Bowden, Mike Coleman, and Paul Frank
Glitches in plant data systems often bring production to a complete stop. When that happens, how do you respond?...
Facility Security: Voice Evac Systems
Sep 1, 2000, By Paul Rosenberg
Unlike the screams, beeps, and yelps of horn and buzzer alarm systems, today's voice evac systems now have their say....
AGC Declares Victory on Death Tax Relief Lobby
Sep 1, 2000, By EC&M Staff
After a vigorous lobbying and grassroots effort from the Associated General Contractors of America (AGC), Alexandria, Va., and other organizations, the...
Execs See Growth in Security Market
Sep 1, 2000, By EC&M Staff
As the fast-growing security market evolves, new profit opportunities may open up for electrical manufacturers, distributors, and contractors in a business...
The basics of insulation resistance
Sep 1, 2000, DeDad, John A.
One of the most fundamental of electrical installation and maintenance tasks is taking insulation resistance (JR) readings. This is done to verify the...
Top Networking Nuisances
Aug 1, 2000, By EC&M Staff
Moves, Adds, and Changes (MACs) continue to be a leading headache for network professionals, according to a recent survey by Cablesoft, Tempe, Ariz.Conducted...
Secrets to Estimating Datacom Work, Part 2
Aug 1, 2000, By Paul Rosenberg
Knowing the steps involved with installing optical fiber systems can keep you from losing your shirt on your next datacom estimate....
Troubleshooting Your VFDs
Aug 1, 2000, By Stan Turkel
Variable-frequency drives (VFDs), also known as adjustable-speed drives (ASDs) have become the preferred method of controlling speed to meet load requirements....
Premises Cabling Market Reaches Saturation Point
Aug 1, 2000, By EC&M Staff
A recent market research study of the U.S. premises cabling system market, conducted by World Information Technologies, Inc., Northport, N.Y., indicates...
Firestopping Fundamentals
Aug 1, 2000, By Paul Rosenberg
When installing cable on any project, you must consider fire containment. This means understanding the importance of firestopping. Technically speaking,...
Insulation Resistance Testing: How and Why?
Aug 1, 2000, By John A. DeDad
How significant is insulation resistance testing? Since 80% of electrical maintenance and testing involves evaluating insulation integrity, the answer...
