... 25OPERATING REMPERATURE( °C )-20~+55EFFECTIVE DISCHARGE TIME(S)≥6EFFECTIVE DISCHARGE DISTANCE(M)≥3.0MATERIALCarbon Steel Class ACommon combustibles ... May occur in homes, office buildings, or business. Class BFlammable liquids such as gasoline, kerosene, oil, grease, ... in kitchens, garages, light manufacturing plants and warehouses. Class CLive electrical equipment. Often occurs in computers, motors, ...