Overcurrent exists when current exceeds the rating of equipment or the ampacity of a conductor. This can be due to an overload, short circuit, or ground fault [Art. 100]. Overcurrent devices protect conductors and equipment from overcurrent.
Outdoor conductors running to buildings aren't necessarily service conductors. They may be feeders or branch circuit conductors originating in another building. They may provide power for area lighting, outdoor equipment, or a separate structure.
Unlike solar and wind systems, fuel cells run on fossil fuel, even though they reduce fossil fuel usage in total. However, that is changing — as biomass-based fuel cells are being developed.
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.
See side-by-side comparisons of different flame resistant fabrics exposed to flash fires, illustrating the extent, severity and location of burns....More
