Point out the placement of all units. Have units available for the training session. Discuss how to read the label, select the proper unit, and how to operate, inspect and maintain it. Let employees practice using an extinguisher.
The universal classification system has four designations for fire extinguishers, class A, B, C, D. Based on the size of a fire to be extinguished and the contained extinguishing agent. A 20B rating is recommended for non-expert user.