Air-conditioning (AC) tech is electrocuted on roof of strip mall, after coming in contact with an energized sign that later proved to have no solid ground path...More
Despite the slowdown in construction caused by the U.S. economic recession, Jackson, Mich.-based engineering, consulting, and construction management...More
When applied to blowers and pumps, variable-frequency drives (VFDs) offer energy savings. In mechanical applications, they allow fine adjustments that...More
You would think one of the most basic concepts of an electrical system would be the most widely understood. But after years of working in the electrical...More
Why is it that residential deep well submersible pump system malfunctions are notoriously hard to diagnose? For one, a pump/motor assembly suspended 10...More
Twenty-seven-year-old Tyler Squire could crunch mathematical problems in the blink of an eye. When it came to applying his skills to the real world, however,...More
Today, many facilities have online monitoring systems that continuously track power quality, provide valuable information about energy use, and characterize...More
Few would argue that electrocution is a serious threat to electrical workers. However, it's only one of the dangers faced by this group of individuals, as evidenced by a tragedy that occurred at a Michigan vehicle transmission plant....More
The use of low-voltage lighting systems has become increasingly popular over the past several years. In fact, low-voltage halogen and xenon lighting systems...More
Early in his career, Jamie Wilkie, owner of Mister Sparky of Greenville, S.C., learned a valuable lesson. Eight years ago, Wilkie already a licensed master...More
Asbestos is the generic name given to a group of naturally occurring, fibrous minerals with high tensile strength, flexibility, and resistance to heat,...More
We all know that electric utilities in the United States generate electricity at various 60-Hz voltage levels that result in a sine wave waveform. The...More
When it comes to training, Midwest ENERGY Association (MEA), Eagan, Minn., believes in the old saying two heads are better than one try 14 heads to be...More
Any petrochemical worker or electrician exposed to electric arc has something in common with a meth lab cleanup team. When they arrive on the job site,...More
An introduction to variable-frequency drives. Speed, torque, and horsepower are three inter-related parameters in motor control. The speed of a motor, measured in revolutions per minute (rpm), defines...More
Proper training is an important part of any occupation, but it's especially critical to workers in the electrical profession. A journeyman electrician...More
When an experienced electrician began working on the switchgear of a medical facility's main control room, he had no idea this job would be his last....More
The National Association of Electrical Distributors (NAED), St. Louis, recently introduced new business development tools created specifically for contractors....More
New supervisors play a key role in any organization's growth and development for many reasons, not the least of which is the fact that their main responsibility...More
A journeyman electrician with more than 25 years of experience found out the hard way that decades spent on the job doesn't necessarily make you immune...More
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
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.
