![]() ![]() In addition to labels, marking the arc flash boundaries with floor tape and PPE categories clearly shows workers where they can go and what level of protection they must wear in those categories. Table 130.4(C)(a) in NFPA 70E shows the limited access and restricted approach boundaries based on AFIE PPE categories relative to AFIE can be found in Table 130.5(G). NFPA 70E requires that arc flash labels be applied to equipment showing: The radius of an arc flash boundary is determined by calculating the arc flash incident energy (AFIE) using the methods described in IEE 1584 and the NFPA 70E standard. There is always a risk of arc flash when working around electrical equipment, so it is critical to establish arc flash boundaries that keep workers away from hazards and protect them from injury. But it is universally accepted that deenergizing is the most effective way to prevent arc flash events, shock, and electrocution. There are exceptions, such as hospitals and other environments where deenergizing could create a greater hazard than working on energized equipment. Article 100 of the NFPA 70E defines an ESWC as “A state in which an electrical conductor or circuit part has been disconnected from energized parts, locked/tagged in accordance with established standards, tested to ensure the absence of voltage, and grounded if determined necessary.” This means that work should only be performed on deenergized equipment it’s the foundation of every workplace safety program. The first step in preventing an arc flash from occurring is to create an electrically safe working condition (ESWC). In this blog, I will walk you through four ways you can use these solutions to fortify your safety program and better safeguard your workers and equipment from arc flash risks, including helpful controls, procedures, and equipment. ![]() Fortunately, our industry has spent the last few years developing solutions to prevent arc flashes and reduce severity when one occurs. Dust or moisture can also cause arcing between conductors, which explains why high-voltage power lines will glow in foggy weather.Īs electrical professionals, we’re often tasked with mitigating these safety and financial risks for our employees and our customers. Arc faults are caused by electricity discharging between two or more conductors that are improperly connected, such as frayed wires. Then, what is an arch flash?Īn arc flash is an electrical accident that creates a dangerous, high-temperature explosion.Īn arc flash results from an arc fault. ![]() The direct financial impact of an arc flash event is substantial and so too are the costs related to business operations, insurability, and reputation. According to the NFPA, five to ten arc flash incidents occur every day and nearly 2,000 people are exposed to the harmful effects each year. Learning what is an arc flash is key for electrical professionals. Mount these systems on a wall, a smooth metal surface, or even glass through use of the versatile mounting options.This audio was created using Microsoft Azure Speech Services. The Magnetic Line attaches to both magnetic & non - magnetic surfaces for quick closure of docking doors, elevators, escalators, bathrooms, aisles, corridors, lock out/tag out, Arc Flash Boundary, etc. ![]()
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