It’s a good question, one you likely need to know the answer to if you ever face a fire. Having an understanding of the different classes of fire ensures you use the most suitable fire extinguisher for the situation.
However, using the wrong extinguisher can increase the danger to you and to others as it can potentially act as an accelerant that makes the flames build and spread. So, to begin with, it’s worth knowing that the fire classification system refers to the material which is burning or has caused the fire.
A class A fire is the most common type of fire and consists of ordinary combustibles such as wood, paper and fabric.
What Causes Class A Fires?
Ordinary combustibles are things that burn easily. They are commonly found in homes and businesses and include the examples above as well as trash, plastics, rubber, straw, etc.
A good rule to follow is that if it produces ash, then it is a Class A fire.
The main cause of Class A fires is usually when ordinary combustibles reach a certain temperature that causes its ignition, or a spark comes into contact with them. The following scenarios can result in Class A fires:
- Unattended candles or open flames
- Faulty wiring or overloaded electrical circuits
- Improperly discarded cigarettes or matches
- Heat from appliances or machinery placed too close to flammable items
Which Fire Extinguisher Should You Use For Class A Fires?
Class A fires will continue to burn as long as there is heat, oxygen and fuel. (This is the fire triangle – all three elements are needed to ensure a fire burns. Take away one, and the fire will stop.)
A water fire extinguisher is the best bit of kit to use on a Class A fire. It’s worked from the beginning of time, and it still works now. It will cool and soak the fire and its combustible materials to prevent re-ignition.
Foam fire extinguishers, dry powder extinguishers, and wet chemical extinguishers will also work on a Class A fire if you haven’t got a water one close to hand.
A water hose would also be effective at putting out a Class A fire, and will help dampen the embers after to avoid it reigniting.
How to Prevent Class A Fires in Your Home or Workplace
Class A fires can be difficult to prevent. However, provided below are two simple Class A fire prevention checklists to follow, one for home and one for the workplace, to minimise risks.
Class A Fire Prevention Checklist for Home
General Safety
- Keep flammable items (paper, fabric, wood) away from stoves, heaters, and candles
- Never leave cooking or candles unattended
- Dispose of cigarette butts in a non-flammable container
- Store matches and lighters out of children’s reach
- Regularly clean dryer lint traps
Electrical Safety
- Check cords for damage or fraying
- Avoid overloading sockets or power strips
- Turn off appliances when not in use
Emergency Preparedness
- Install smoke detectors in key areas (kitchen, bedrooms, hallways)
- Test smoke detectors monthly
- Keep Class A fire extinguisher easily accessible
- Create and practise a home fire escape plan
Class A Fire Prevention Checklist for the Workplace
Housekeeping
- Store paper, cardboard, and fabrics away from heat-producing equipment
- Empty trash bins regularly
- Keep storage areas clean and clutter-free
Electrical Safety
- Report and replace damaged cords or equipment
- Ensure electrical panels are unobstructed
- Use surge protectors appropriately, and avoid daisy-chaining extension cords
Appliance Use
- Turn off coffee machines, space heaters, and other small appliances when not in use
- Keep appliances on non-flammable surfaces
Emergency Readiness
- Install and test smoke alarms in common areas
- Ensure fire extinguishers are visible, accessible, and inspected monthly
- Post emergency exit maps in visible locations
- Conduct regular fire drills and safety training
Staying Safe Starts With Awareness
Understanding what a Class A fire is, and how to prevent and extinguish it, could be the difference between a small incident and a serious emergency. These types of fires may be common, but that’s exactly why they deserve close attention, both at home and in the workplace. By identifying the risks, keeping combustibles clear of heat sources, and ensuring the right extinguishers are on hand, you put yourself in the strongest position to respond quickly and safely. Fire safety doesn’t have to be complicated – it just has to be intentional.
