Fire Prevention Education

Fire and Extinguishers

Fire TriangleFire results from a combination of three ingredients: Oxygen, Fuel and Heat. These components form the fire triangle. A fourth element, the chemical reaction results in a fire “tetrahedron”.

Fire extinguishers put out the fire by taking away on or more elements in the fire triangle/tetrahedron. Fires can start anywhere and at anytime. This is why it is important to know which fire extinguisher to use and where it is located.

Read the directions on your fire extinguisher as types may vary.

Directions for the P-A-S-S Method

P – Pull the pin at the top of the extinguisher and break the plastic/thin wire inspection seal.
A – Aim the nozzle or outlet at the fire.
S – Squeeze the handle. The handle can be released to discharge at any time.
S – Sweep the nozzle back and forth at the base of the fire.

*Ensure the fire is out. After the fire has been extinguished, watch for possible re-flash of flammable liquids or remaining smoldering hot spots.

Types of Fires

Class A: wood, paper, rags, rubbish and other ordinary combustible materials.

Recommended Extinguishers
Water from a hose, pump type water can or pressurized extinguisher and soda acid extinguishers.

Fighting the Fire
Soak the fire completely – even the smoking embers.

Class B: flammable liquids, oil and grease

Recommended Extinguishers
ABC units, dry chemical, foam and carbon dioxide extinguishers.

Fighting the Fire
Start at the base of the fire and use a swinging motion from left to right, always keeping the fire in front of you.

Class C: electrical equipment

Recommended Extinguishers
Carbon dioxide and dry chemical (ABC units) extinguishers.

Fighting the Fire
Use short bursts on the fire. When the electrical current is shut off on a class C fire, it can become a class A fire if the materials around the fire are ignited.