Final answer:
Water is not suitable for extinguishing electrical fires because it's a good conductor of electricity, which can lead to worsening of the situation by allowing electrical current to spread. Instead, Class C fire extinguishers, which contain non-conductive materials for putting out electrical fires, should be used.
Step-by-step explanation:
The reason we are advised not to flick electric switches with wet hands and to avoid throwing water on an electrical fire is due to water's ability to conduct electricity. When hands are wet or when water is applied to electrical sources, the water can act as a medium for the electrical current to travel, potentially causing electric shock or further igniting the fire as electricity moves unexpectedly. In the case of an electrical fire, non-conductive materials, such as dry chemical powder from a Class C fire extinguisher, are the preferred method for extinguishing the flames safely.
Water is a good conductor of electricity, which is why it's dangerous in electrical situations. Using it on an electrical fire can create a conductive path that allows electricity to spread and may lead to electrocution, property damage, or even more extensive fire spread. Always ensure that electricity is completely turned off in an area affected by fire, and use appropriate fire-extinguishing methods that are non-conductive to deal with the situation adequately.
In addition to using appropriate extinguishing agents, one should be aware of the specific type of fire extinguisher that's suitable for each kind of fire. Class C fire extinguishers are designed specifically for electrical fires and should be nearby in places where electrical fires are a risk (home, offices, workshops, etc.). Always prioritize safety and be prepared by knowing how to properly use a fire extinguisher, and understand the types of fires each class of extinguisher is designed to handle.