Weld inside a screened area to protect coworkers. The arc flash boundary • The distance from the source of the arc flash blast where the incident energy equals 1.2 cal/cm2 • In order to protect workers, one would have to stand outside of this boundary or be dressed in personal protective equipment (PPE) that has a withstand rating exceeding the level of exposure at a given distance (usually a working distance of 18–24 inches) Worker wearing PPE … R.C I'd say your safe catching a flash from an arc about 50 feet or so,but you still can't sit there and look at it.LOL I'm just guessing on the distance,but going on experience. Mr. Lyon published his work in an article in the AWS Welding Journal (December 2002). when is it safe to look at a welding arc? With Mr. Lyon’s permission, we decided to … Flash Protection Boundary (FPB) – the calculated safe working distance from electrical equipment which would not expose the employee to the hazards associated with an electrical arc flash. Brief viewing of an arc, limited by natural aversion or the blink response, do not exceed personnel exposure limits for the retina. And while second-degree burns are not desirable, they’re treatable, unlike third-degree burns that could be sustained by … Bringing light to the subject of Welding and the damage caused if eye protection isn’t used. Arc Flash Boundary (ARC) – is the distance at which an electrical arc can flash outward, which may endanger employees working on electrical equipment. The NFPA 70E … Chapter 1 / 5 DID YOU KNOW? R.C By BankerQC Date 11-12-2002 16:15 All forms of light are part of the electromagnetic spectrum as are the gamma and x-rays used in industrial radiography. Arc welding can reach temperatures greater than 10,000 degrees F, posing a fire and explosion hazard. What is the Safe distance From a Welding Arc Flash? It just needs to be able to irradiate your eye. Staring at the arc should never be permitted without appropriate eye protection. According to the Occupational Safety and Health Administration (OSHA), some facilities have been fined for over $500K for not being compliant with electrical safety regulations. In such a case, the Incident Energy value of an arc flash would be 1.2 cal/cm² for 1.0 second. Arc Flash & Distance Question 01-07-2006, 02:44 PM At my day job, the welding guys do a really good job of keeping their arcs behind curtins, but every once and a while, from a distance you can see an arc flash and your eyes try to look in that direction - which of course I don't. Same welding arc … Portable screens, shields, and anti-flash goggles can also be used to protect visitors and coworkers. The NFPA 70E shows an Arc Flash Boundary, which determines the distance from the equipment within which a person could receive a second-degree burn in the event of an arc flash. Electrical Assessment – an analytical evaluation which would … Arc flash incidents lead to over 2,000 hospitalizations. 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