Final answer:
Carbon dioxide or dry chemical should be used on electrical equipment fires, as water is a conductor of electricity and can cause electric shock.
Step-by-step explanation:
The type of extinguishing agent that should be used on electrical equipment fires is carbon dioxide or dry chemical.
Water should not be used on electrical equipment fires because it is a conductor of electricity and can cause electric shock.
Certain types of fire extinguishers, such as those containing dry chemical or carbon dioxide, are specifically designed to combat electrical fires by blocking the oxygen supply.