Typically determined by a blue label, dry powder extinguishers are occasionally known as ABC extinguishers. These multi-function extinguishers can be used on fire classes A, B and C, meaning they may be utilized with combustible elements, flammable gases and flammable liquids. Compatibility problems: Integrating addressable systems with present fire alarm https://www.firesense.co.uk/type/conventional-fire-system/