Published:
May 2009

Featured In This Issue

 

Featured Articles

Transformer Accessibility, Derating Conductors and More

By George W. FlachUnder (Codes & Standards)

Article 210 Branch Circuits; Article 240 Overcurrent Protection; Article 250 Grounding and Bonding;

Low Voltage But Not Low Risk

By Russ MunyanUnder (Miscellaneous)

The good news is that the electrical current through low-voltage cabling—such as telecommunications

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Branch Circuit, Feeder and Service Calculations, Part XXXIX
(Codes & Standards)
By
Charles R. Miller
May 2009
READ MORE
Duct Lookout
(Miscellaneous)
By
Edward Brown
May 2009
Duct detectors are installed through the wall of a duct in order to sense whether smoke is present in the air-circulation system. READ MORE
Two for Smoking
(Miscellaneous)
By
Allan B. Colombo
May 2009
One way electrical contractors (ECs) ensure safety is to install smoke alarms in every home they wire. READ MORE
Powering Up: Temporary Generators
(Miscellaneous)
By
Mark C. Ode
May 2009
While preparing a presentation, I noticed a photo taken at a facility where temporary power was needed periodically. The facility rented a generator when necessary. READ MORE
Nearly There: Screw-In LEDs
(Lighting)
By
Craig DiLouie
May 2009
The stakes are high. According to U.S. Department of Energy (DOE) estimates, nearly 1 billion 60W A19 lamps will be installed in the United States by 2010. READ MORE

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Safety Equipment and Apparel
1 Rain Gear > Salisbury by Honeywell’s arc- and flame-resistant PVC Nomex rain suit has an ATPV of up to 9 cal/cm². READ MORE
Cool Tools: Tools for Fiber
As demand for broadband increases, the superiority of fiber optic data communications networks is recognized by enterprise organizations, smaller businesses and even individu READ MORE
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