HRC 4 Arc Flash Clothing

Safety Supply America is a leading online source for NFPA 70E HRC 4 Arc Flash clothing. HRC 4 Arc Flash clothing is the highest rated category of FR clothing for electrical service technicians. Arc Flash clothing is utilized when there is serious risk of being exposed to an arc flash. Safety Supply America has a large selection of FR hoods with face shields, as well as HRC 4 overalls and coats. Level 4 Arc Flash clothing has a minimum arc flash rating of 40 calories/cm².

What is Arc Flash Clothing?

An arc flash is an explosive release of energy caused by an electrical arc. It can result from a phase-to-phase or phase-to-ground fault caused by accidental contact with an electrical system, a buildup of dust, an improper work procedure, or poor work conditions. Arc flashes can reach temperatures of up to 35,000 degrees Fahrenheit. Exposure to an arc flash can result in serious injury or possibly death. If an arc flash occurs, arc flash clothing can be worn to help minimize damage caused by the flash. Nevertheless, serious injury or death may still occur.

Arc Rating & Hazard Risk Categories

Arc rating is the value of energy necessary to pass through a fabric to create a 50% probability of causing a second or third-degree burn. That value is measured in calories/cm², and corresponds with the HRC (Hazard Risk Category) scale. Safety Supply America carries NFPA 70e HRC 4 Arc Flash clothing with an arc rating greater than or equal to 40 cal/cm². Below is the HRC (Hazard Risk Category) scale.