On the surface, incorporating the concepts of selective coordination in the design of power distribution systems seems like a Why wouldn't you want to...More
Although the three-year Code-making cycle for the 2008 edition of the National Electrical Code (NEC) recently closed, the dust has not yet settled on...More
The NEC defines a controller in a few different ways. In Art. 100, a controller is described as a device or group of devices that serves to govern, in...More
While not a major topic of consideration when designing and maintaining facilities in past years, code-enforcement bodies have become increasingly aware...More
Although industrial lighting has historically been a step behind technologies used for other building types, many of the advancements made over the past...More
Because stationary batteries and 48VDC power systems serve as lifelines for telecommunication networks, the reliability of these systems is of the utmost...More
The advent of ever-more powerful software has relieved contractors of tedious work ranging from bookkeeping to taxes to estimating. Time that used to...More
Have you ever heard the expression, green is ground the world around? I have, many times. But do you ever personally check the green conductor to see...More
Every so often, the electrical industry is able to add to our understanding of what makes a safe, well-designed electrical system. This knowledge can...More
At first glance, Kay-R Electric, Syracuse, N.Y., seems like a typical electrical contracting firm. The company specializes in electrical construction...More
In any dimming system, the ballasts and controllers must be able to speak the same language. In the case of digital dimming systems, this language is...More
Lighting professionals from around the globe viewed the latest products and newest technologies at Lightfair International 2007, held May 6-10 at the...More
A century ago, the first engineering licensure law was enacted. Now, every state regulates the practice of engineering to ensure public safety by granting...More
States Don't Follow Stricter Standard, Says Former 90.1 Chair There are some problems with the May article Mood Lighting written by Beck Ireland starting...More
Lightning protection can be a critical part of any building's infrastructure, providing protection to people and property. When assessing a particular...More
Single-phase and 3-phase AC squirrel cage induction motors need some type of control circuit to initiate a start or stop function. The two types of ladder...More
Currently overseeing a retrofit at Fay Herron Elementary School in Las Vegas, Clark County School District Project Manager Dennis Miller has two primary...More
These days, it seems everyone is jumping on the bandwagon including many companies in the electrical construction industry. Concern for the environment,...More
No harmonic mitigation solution is ideal for every application. So, once you or your client decides to reduce harmonic distortion on a facility electrical...More
The lighting industry has been buzzing with news of solid-state light source advancements for several years. As one light-emitting diode (LED) lighting...More
Revenue for overall design services remained hot for the majority of engineering firms in EC&M's 2007 Top 40 list. Commanding a sunny average year-over-year...More
A specialized segment of the electrical construction and maintenance industry, AC motor control is an area that requires specific knowledge in order to...More
Replacing many older aircraft ground servicing electrical systems, solid-state frequency inverters (SSFI) are primarily being used these days as a cost-savings...More
State energy codes in the United States, which must be at least as stringent as the ASHRAE/IES 90.1-1999 standard, require automatic shutoff of lighting...More
LEDs have unique and compelling characteristics that make them ideal for industrial lighting applications. But there are a variety of misconceptions about LEDs, how well they work, how long they last, and more. Digital Lumens developed this whitepaper to dish up the facts around LEDs and address some common misunderstandings....More
An arc flash is associated with the explosive release of energy caused by an electrical arc, due to either a phase-to-ground or a phase-to-phase fault. This kind of fault can result from many factors – a dropped tool, accidental contact with electrical systems, buildup of conductive dust, corrosion or improper work conditions.....More
Abstract: In this webinar, Mike will not only explain the current NEC requirements for GFCIs and AFCIs, but he'll explain how they operate, what causes their premature failure, and when they won't provide the safety protection you might have thought they would.
Abstract: This webinar will teach attendees the difference between risk and hazard, and how the choice of system grounding has a direct impact on reliability and safety.
Arlington’s recessed combination power and low voltage boxes – TV BOX™ and Indoor IN BOX™ – offer secure, convenient & easy way to mount LCD or plasma TVs flush against a wall....More
