When should electrical equipment be turned off before extinguishing a fire?

The rationale for turning off electrical equipment before using Class A or B extinguishers is based on safety concerns and the nature of these fire classes. Class A fires involve ordinary combustibles like wood or paper, while Class B fires typically involve flammable liquids and gases. Both types of fires can create hazardous conditions when combined with electrical equipment.

Turning off the electrical equipment helps prevent potential electrical shock hazards for the person using the extinguisher and also mitigates the risk of the fire reigniting or spreading due to an active electrical source. This precaution is vital in ensuring the safety of the extinguishing process and effectively managing the fire. By following this guideline, individuals can better protect themselves and others while minimizing further fire-related risks.