How to Put Out an Electrical Fire Safely: Steps, Extinguishers, and Prevention

An electrical fire calls for an escape decision before an extinguisher decision. Alert others and call 911 from safety; only trained, authorized people should consider using a Class C-rated extinguisher on a small, contained fire.

Knowing those limits helps facility staff separate emergency response from professional recovery and protection planned before a future incident.

On this page:

Five-step response · Extinguisher comparison · What not to do · Causes and warning signs · After the fire · Prevention

How Do You Put Out a Small Electrical Fire Safely?

A small electrical-fire response starts with protecting people and calling for help, followed by conditional extinguisher use.

Electrical equipment adds a shock hazard to combustion, so selecting an agent is only part of the decision; safe access and a usable exit govern whether an attempt is appropriate.

The steps below describe decisions, not tasks that must all be completed before leaving. If intervention is unsafe at any point, evacuation takes priority.

Step 1: When Should You Evacuate and Call 911?

When an electrical fire is discovered, alert others and arrange a 911 call from safety; evacuate immediately if safe intervention is uncertain.

Fire and toxic smoke can make an exit unusable, so maintaining a clear way out takes priority over completing any firefighting action.

An extinguisher attempt requires all of these conditions:

• You are trained, authorized, and physically able to operate the available extinguisher.
• The fire is small and limited to one object or surface, and you are safe from toxic smoke.
• Others have been alerted, responders called, and a clear escape route remains available.

Uncertainty about any condition means leaving, not investigating further.

A small visible flame is not permission to open an electrical cabinet to reach its source.

At work, follow the site’s emergency plan. Some plans permit only designated employees to use extinguishers and require others to evacuate; equipment availability does not make firefighting everyone’s responsibility.

Step 2: Should You Turn Off the Power?

Yes, but only when a safe, accessible shutdown point can be used under the site’s emergency procedures without delaying escape.

Removing the supply reduces the electrical energy feeding the equipment, but backfeed from another source can leave parts energized after one switch has opened.

If reaching the shutdown point would take you toward smoke or flames, leave it alone and evacuate. Do not open the cabinet, touch damaged plugs, or operate a fire-affected panel.

Qualified electrical personnel must verify the deenergized condition before work; a switch position alone is insufficient.

Step 3: How Do You Check the Extinguisher’s Rating?

Check the extinguisher’s label for a Class C rating and the other fire classes it covers.

The C designation identifies electrical-equipment suitability, while the accompanying A or B ratings describe fuel hazards, so the complete label matters more than the extinguisher’s appearance.

An ABC label includes Class C coverage; an ordinary water extinguisher labeled only for Class A does not.

If the label is missing, unreadable, or does not cover the hazard, do not use that extinguisher for the attempt.

Step 4: How Do You Use the PASS Method?

For a trained, authorized person facing a suitable small fire, PASS provides a sequence for operating a portable extinguisher.

It prepares the extinguisher for discharge and directs the agent across the base of the fire, where the burning material needs to be reached.

Keep the escape route available and follow the extinguisher’s labeled discharge distance. PASS means:

1. Pull the pin: keep the discharge outlet directed away from your body as you remove the pin securing the operating mechanism.
2. Aim at the base: direct the nozzle toward the burning material, not the tops of the flames. Keep the nozzle low.
3. Squeeze the lever: press slowly and evenly to discharge the agent, maintaining your aim at the base of the fire.
4. Sweep across the base: move the nozzle from side to side so the agent reaches across the burning area.

Step 5: When Should You Stop and Leave?

Stop using the extinguisher and leave if the fire is not promptly controlled or your escape conditions deteriorate.

A portable extinguisher has a limited agent supply, while fire and smoke can continue spreading, so remaining for another attempt can remove the opportunity to withdraw safely.

An empty extinguisher with fire still burning, growing flames, or smoke threatening the exit are reasons to withdraw.

Do not stay to fetch another extinguisher or approach a hidden fire. Keep fire, heat, and smoke from coming between you and the way out.

If the visible flames go out, back away rather than moving closer to inspect the equipment. Let responders evaluate the incident; apparent extinguishment is not clearance to re-enter or restore power.

Which Fire Extinguisher Should You Use on an Electrical Fire?

Use a Class C-rated extinguisher when energized electrical equipment is involved, provided the fire is suitable for a trained person’s intervention.

Class C identifies an agent that does not conduct electricity; combined ABC or BC markings also describe the other fire classes the extinguisher can address.

Class A covers ordinary combustible materials such as paper and wood, while Class B concerns flammable or combustible liquids and related fuel hazards. 

Class C describes energized electrical equipment, not a separate kind of fuel.

Removing electrical power therefore does not automatically make every remaining fire Class A.

CO₂ also creates a breathing hazard by displacing oxygen. Do not use it in an occupied confined space.

A Class C marking addresses electrical conductivity; it does not promise that sensitive electronics will remain undamaged.

What Is an Aerosol Fire Extinguisher Device?

In electrical-cabinet protection, an aerosol fire extinguisher device is a preinstalled unit that releases a suppression agent.

Its fine particles interrupt combustion reactions inside the enclosure, providing local protection without a separate pipe network; this differs from a handheld consumer spray.

This protection is planned before an incident, not installed as an emergency firefighting measure.

CNC Electric’s YCFP7 offers compact protection for early fires in small enclosed spaces without pressurized storage. It features 10 g of agent and ≤0.1 m³ coverage.

What Should You Never Do During an Electrical Fire?

Avoid actions that increase electrical exposure or delay escape during an electrical fire, including water application and contact with damaged equipment.

An agent can affect visible flames without resolving the electrical hazard, so neither a household substitute nor an apparently successful attempt establishes safe conditions.

Can You Use Water on an Electrical Fire?

No, do not pour water onto energized electrical equipment or use an ordinary water extinguisher on it.

A water stream reaching live parts can provide a path for electrical current, exposing the person applying it to electric shock while the supply remains connected.

Turning a switch off is not permission to start using water: the deenergized condition still needs qualified verification.

What If You Do Not Have a Suitable Fire Extinguisher?

If no suitable fire extinguisher is available, leave the danger area and call 911 instead of improvising with household materials.

Electrical fires require control of both combustion and electrical exposure, and an unverified substitute gives no reliable basis for managing those hazards.

Do not delay departure to search for another product or collect materials from elsewhere in the building.

Can Baking Soda, Salt, or Flour Put Out an Electrical Fire?

No, do not rely on baking soda, salt, or flour to fight a fire inside electrical equipment.

Household smothering advice does not establish safe access to energized parts or effective suppression inside an enclosure. A tip about affecting a small flame is not a cabinet-fire response plan.

Some household guidance mentions baking soda for a small electrical fire. That limited advice does not demonstrate a safe method for a fire within switchgear, an electrical panel, or another enclosure.

Ordinary clothing and household blankets are not substitutes for an appropriately rated extinguisher, either. Do not move close to burning equipment to cover it; that creates another reason to approach the hazard.

What Causes Electrical Fires, and What Are the Warning Signs?

Electrical fires can begin when overloaded or damaged electrical equipment produces enough heat to ignite nearby combustible material.

Insulation damage and poor connections can create electrical hazards, while warning signs such as discoloration or recurring trips indicate a need for attention rather than proving one specific fault.

Overloading puts more current through wiring or an accessory than it is intended to carry, increasing heat.

Damaged insulation or cords can expose conductors and create fire and shock hazards.

Poor connections can overheat or arc at the contact, even when the surrounding equipment looks intact.

These mechanisms explain why a seemingly minor cord or connection problem deserves attention. They do not allow a facility employee to identify an internal fault by sight or sound.

Observe only from a safe location; do not touch equipment to check whether it is hot. Smoke, flames, or a suspected active fire call for the emergency response, not routine troubleshooting.

How Can You Prevent Electrical Fires?

Electrical-fire prevention combines safer everyday equipment use with prompt professional attention to developing problems and a prepared emergency response.

These measures serve different purposes: sound electrical use reduces ignition hazards, while training and accessible protective equipment help people respond if prevention fails.

Everyday use: avoid overloaded outlets and power strips, replace damaged cords or equipment, and keep combustible material away from electrical heat sources. These are practical ways to reduce ordinary ignition hazards.

Professional attention: report recurring trips, visible damage, or unusual outlet behavior promptly. Have the underlying problem assessed instead of treating repeated resets or temporary workarounds as a repair.

Emergency readiness: make the site’s evacuation and extinguisher-use roles clear before an incident. Keep designated extinguishers accessible and maintained, and provide appropriate training for employees expected to use them. A nearby extinguisher is useful only if the response plan and the people using it are prepared.

For electrical enclosures, prevention can be complemented by protection that acts after ignition. A preinstalled local suppression device serves that different role; it does not repair the electrical cause of the fire.

Preparation should make the emergency decision simpler: protect people first, use only appropriate equipment within training, and leave recovery to qualified personnel. Plan cabinet suppression as a separate protection measure before a fire occurs.