This would also be the distance that the work zone barricades are set up given it is greater than the Arc Flash Boundary discussed above. This section will give you the information on the voltage at the equipment, here it is 208 VAC, and what the distance that folks who are unqualified must stay behind unless accompanied by a qualified person. It is important to remember that incident energy decreases with distance so if you have room to spare why not set up your barricades greater than the Arc Flash Boundary. The Minimum Arc Rating of Clothing is telling you that at a working distance of 1 foot 6 inches (this is the assumed working distance when doing the calculations), what the minimum clothing requirement is to ensure that you would receive no more than a second-degree burn. The Arc Flash Boundary is the distance that unprotected skin could receive a second degree burn and is the distance that you would set up your work zone barricades if greater than the 42-inch limited approach boundary defined in NFPA 70E. This section is broken into two parts, Arc Flash Boundary and Minimum Arc Rating of Clothing. It’s just letting you know that there is a hazard present and what the hazard is in this case “Arc Flash and Shock Risk”. This section is hopefully self-explanatory. Below I will go through the label piece by piece to give you an easy to understand overview of the information being presented. Making sure that you and your employees understand the label will ensure that safe work practices are adhered to and workers are properly protected. Having your equipment labeled is a critical step in protecting your workers from the hazards of electrical shock and arc flash.
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