Understanding Fire Extinguishers: Focus on Class C

Fire extinguishers are crucial safety tools designed to quickly suppress fires before they spread. They come in various designs and can effectively put out different types of fires if used correctly. This article will discuss the types of fire extinguishers, their use, and focus specifically on Class C fire extinguishers.

Types of Fire Extinguishers

There are six main classes of portable fire extinguishers based on the type of fuel involved in the fire:

1. Class A: For ordinary combustibles like wood and paper.
2. Class B: For flammable liquids like gasoline, oils, greases, and other oil-based materials.
3. Class C: For electrical fires involving circuits, equipment, wiring, or appliances.
4. Class D: For metals such as magnesium, titanium, lithium, sodium, and potassium.
5. Class E: For electrical fires where the ignition source is still energized.
6. Class F: For cooking oils and fats commonly found in kitchens.

Each class has its own specific extinguishing agent suited for that particular type of fire.

How to Use a Fire Extinguisher

When using a fire extinguisher, follow these steps:

1. Pull the pin: Remove the locking mechanism that prevents the discharge of the contents.
2. Aim at the base of the fire: Stand close enough to easily reach the nozzle onto the fire, but far enough away from burning debris.
3. Squeeze the handle: Press the lever slowly to release the extinguishing agent. Most extinguishers have a diagram showing the correct squeeze pressure.
4. Spray continuously: Direct the stream towards the fire, moving it back and forth across the base until the fire is completely out. If the fire starts again, repeat these steps.

Remember, do not attempt to fight a large fire with a small portable extinguisher. Evacuate immediately and alert others if necessary.

Class C Fire Extinguishers

As mentioned earlier, Class C fire extinguishers are suitable for electrical fires caused by circuits, equipment, wiring, or appliances. These fire extinguishers typically contain monoammonium phosphate (AMP), a nonconductive, dry chemical agent that smothers the fire. To use a Class C fire extinguisher effectively, remember the PASS method:

• Pull: Pull the pin on the extinguisher.
• Aim: Aim the nozzle at the base of the fire.
• Squeeze: Squeeze the handle to release the extinguishing agent.
• Sweep: Move the nozzle side-to-side, making sure to sweep the entire fire.

In conclusion, understanding the types of fire extinguishers and how to use them can help minimize damage during a fire emergency. Remember always to keep your workplace safe by ensuring you have the appropriate extinguishers readily available and well maintained.