Power Shift
Oct 1, 2008, By Chuck Heller, Chloride North America
Responding to market needs, server technology has rapidly advanced, delivering high-density, highly reliable computing without the massive harmonics issues...
Virtual Living Laboratory Teaches Green Building Technologies
Oct 1, 2008, By Stefanie Kure, Senior Associate Editor
Stanford University was founded in 1891 to promote the public welfare by exercising an influence on behalf of humanity and civilization. More than a century...
Motor Calculations
Sep 1, 2008, By Mike Holt, NEC Consultant
To prevent a motor from burning up, you must provide a means of protecting it from overcurrent (overload, short circuit, or ground fault). If you can remember not to confuse motor protection with circuit protection, you’ll eliminate a major point of confusion in motor calculations....
The Future Is Now
Sep 1, 2008, By Beck Ireland, Staff Writer
Despite a collapsed housing market and sluggish general economy, 2007 offered ample opportunity for sales and growth through projects in the non-residential sector ...
Solar PV System Powers California Company's Headquarters
Sep 1, 2008, By Stefanie Kure, Senior Associate Editor
The most populous state in the nation, California is also among the most progressive when it comes to implementing renewable energy initiatives. One such...
Ambulatory Surgical Centers and Emergency Power
Sep 1, 2008, By Burton R. Klein, P.E., Burton Klein Associates and Edward Ginsburg, FIAE, Task Force Solutions
There has been considerable debate in recent years as to the emergency electrical power needs of freestanding, outpatient ambulatory surgical centers (ASCs)....
Fill 'Er Up
Aug 14, 2008, By Mike Holt, NEC Consultant
Raceways must be large enough to hold conductors without overheating and avoid insulation damage during conductor pulls. Therefore, we must determine the maximum number and size of conductors to put in a given raceway. That limit is what we mean by raceway fill....
The 10 Worst Grounding Mistakes You'll Ever Make
Aug 1, 2008, By David Herres, Master Electrician
Proper grounding and bonding prevent unwanted voltage on non-current-carrying metal objects, such as tool and appliance casings, raceways, and enclosures, as well as facilitate the correct operation of overcurrent devices....
Intelligent Infrastructure: Security and Surveillance
Aug 1, 2008, By James Carlini, Certified Infrastructure Consultant
The need to understand how to maximize the network or electronic layer of infrastructure is imperative to maximizing economic viability of any enterprise as well as providing security and surveillance capabilities to it....
Verifying Ground-Fault Coordination for MV Power Cable Shielding
Aug 1, 2008, By John DeDad, Senior Director, Editorial and EC&M Development
According to the IEEE Buff Book, "A power cable must be protected from overheating due to excessive short-circuit current flowing in its conductor," which may damage or destroy the insulation....
Companies Team Up for Smart Home Study
Jul 1, 2008,
Prior research into the field of smart homes, -- residences that apply technology to interconnect systems (security, lighting, sensors, heating, air-conditioning, and audio-video) to improve the building environment and functionality while controlling costs -- has revealed that consumers want comprehensive connected home systems....
Brighter Light May Fight Dementia
Jul 1, 2008,
The link between light levels and emotional health has long since been established, but the results of a five-year Dutch study published in the June 11...
Can Your SPD Go to Extremes?
Jul 1, 2008, By Carey Mossop and Alan Chiste, Eaton Corp.
Surge protective devices (SPDs) have become an integral part of residential, commercial, and industrial power quality applications. The best SPDs provide...
It's Not Easy Being Green
Jul 1, 2008, By Carla Gallina, Lighting Designer
There are many ways of evaluating “green” design. Green architecture includes specification of renewable, local, and nontoxic materials, enhanced envelope design, and daylight strategies....
Cathodic Protection Systems and the NEC
Jun 1, 2008, By Whitt L. Trimble and Eddie Guidry, Fluor Enterprises, Inc.
During the 2005 National Electrical Code (NEC) review cycle, a relatively simple revision was made that created a significant change on the cathodic protection (CP) systems of petroleum and chemical facilities (plants)....
