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It's time for honest conversations about overcurrent protection
We're all human and we all make mistakes. But mistakes in the electrical field can prove costly. Codes and standards work together to reduce mistakes and save lives, which is what makes National Electrical Code (NEC) Section 240.87, Incident Energy Reduction, so significant. It was introduced to the NEC in 2011 as the first requirement focused on incident energy...
Following NFPA 70E helps workers help themselves
Every three years, the National Fire Protection Association (NFPA) updates NFPA 70E: Standard for Electrical Safety in the Workplace®. The standard’s intent is to reduce exposure to the hazards of shock, arc flash, and arc blast while individuals are working on or near exposed electrical conductors or circuit parts that are or can become energized. However, a review of...
Costly damage and downtime are real problems for broadcast facilities operating in lightning prone locations. Fortunately, these problems can often be prevented and without expensive solutions. MARC Radio Gainesville is an example. It recently acquired three new FM stations that share a transmission facility in Trenton, Florida: WDVH, WPLL and WHHZ. Frank Garcia, the group’s former chief information officer, recognized...
When you think about technology leaps, ground-fault circuit interrupters (GFCIs) and arc-fault circuit interrupters (AFCIs) come to my mind as those two that have been and continue to be technologies that are an important part of an overall change in our electrical industry. Today, we’ll look at the journey that AFCIs have taken as our industry works to make...
One of the largest power-generating dams on the Columbia River in the northwest United States needed to replace a single-ended unit substation to ensure operational uptime. Built in the mid-1950s, the dam provides a reliable water source for navigation, irrigation, flood mitigation and recreation for regional residents, and has generated over 9.2 million kilowatts (kW) of electrical power to...
Continuing decreases in the cost of photovoltaic (PV) power systems have resulted in residential and commercial PV systems that are increasing in size and power output. The lead-in photo shows a condo community with PV covering nearly all available roof area; and yes, pointing in several different directions. These larger systems are frequently too large to be connected on...
This article is the result of numerous questions raised by the electrical designers, electrical contractors and even electrical inspectors on the subject at hand. When a design and installation apply to a new construction, it is quite clear that all relevant provisions of the legally adopted codes (i.e., of the National Building Code of Canada – NBCC, and the...
The popular and frequently referenced Model Inspection Checklist for Rooftop PV is now updated and expanded to include the latest national and international codes and safety insight for the rapidly expanding solar industry. Created by the independent Interstate Renewable Energy Council (IREC), the resource provides basic guidelines for reviewing a building permit plan application and inspecting most residential rooftop PV systems. In...
Last year, the Electrical Safety Foundation International (ESFI) conducted a survey of electrical designers, planners, and engineers who design or renovate systems in industrial facilities, healthcare facilities, and IT centers. In response to the survey results, which demonstrated a limited or misinformed understanding of surge protection devices (SPDs), ESFI has created educational materials to spread awareness of the purpose...
Sheikh Mohamed bin Zayed Al Nahyan, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the UAE Armed Forces, on January 17, presented the Lifetime Achievement Award of the 2018 Zayed Future Energy Prize to Shuji Nakamura, Professor of Materials and Electrical & Computer Engineering at the University of California and Co-Director of the Solid State Lighting &...
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