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Apparel Supply Ltd.
Work LAB
IDA Ind Est
Cork Road
Waterford X91 DC96
Ireland
+353 (51) 348000
info@apparelsupply.ie
Apparel Supply Ltd Reg. 141824 Vat No. IE 4877849T Co. brands Fire Guardian®, Waterford Uniforms®, Apparel MED®
Certified Quality Systems, ISO 9001, Module D, ISO 13485. ©2023 Apparel Supply Ltd.
Apparel Supply Ltd.
Work LAB
IDA Ind Est
Cork Road
Waterford X91 DC96
Ireland
+353 (51) 348000
info@apparelsupply.ie
Apparel Supply Ltd Reg. 141824 Vat No. IE 4877849T Co. brands Fire Guardian®, Waterford Uniforms®, Apparel MED®
Certified Quality Systems, ISO 9001, Module D, ISO 13485. ©2023 Apparel Supply Ltd.
An arc flash is a sudden release of electrical energy that occurs when current jumps across a gap between two conductors or from a conductor to a ground. The arc flash generates an intense burst of heat and light that can cause serious injuries, damage to equipment, and fires.
Arc flashes can occur in a wide range of electrical systems and equipment, including switchgear, transformers, motors, and other high-voltage components. They can be caused by a variety of factors, including equipment failure, human error, or a short circuit.
The intense heat generated by an arc flash can cause severe burns, as well as ignite clothing and other materials in the surrounding area, leading to secondary fires. The bright light from the arc flash can also cause temporary or permanent vision damage.
To prevent arc flash incidents, it’s important to follow proper electrical safety procedures, including wearing appropriate personal protective equipment (PPE), de-energizing equipment before working on it, and maintaining a safe distance from energized equipment.
Understanding Arc Ratings and Calories
Now that you understand FR clothing is tested and given an arc rating, you know that the arc rating measures the amount of heat the flame resistant fabric blocks when exposed to electric arc. The arc rating is the number of calories that the garment is expected to “absorb” if exposed to an electric arc. Arc rating is, in essence, the level of protection provided to you, the wearer.
Calorie is the unit of measure of the heat energy of an arc flash and the protective level of FR clothing. The bigger the calorie number, the greater the heat energy level of arc flash and the greater the protective level of the clothing. You will be protected from an electric arc if your clothing has a higher calorie arc rating than the calories of heat generated by the arc.
While it does not matter if the fabric has an Ebt, ATPV and or ELIM value, it is important to pay attention to the calorie level the fabric can support* (as expressed in cal/cm2)
