# What is the rating system for for test fires based upon?

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All extinguishers are rated according to the class and size of the fire they are designed for. Class A and B receive a numerical rating to determine the extinguishing potential for each type and size of extinguisher. Class C is basically a class A or B fire with electricity involved.

## How do you determine fire extinguisher rating?

Fire extinguishers are classified by fire type. The A, B, C rating system defines the kinds of burning materials each fire extinguisher is designed to fight. The number in front of the A, B, or C indicates the rating size of fire the unit can extinguish.

## What factors are the ratings of portable fire extinguishers based upon?

Class A: Ratings 1-A to 40A, based on gallons. 1-A= 1 1/4 gallons, 2-A=2 1/2 gallons. Class B: Ratings 1-B to 640-B, Based on Square ft. Class C: Non-Extinguishing, tests are to determine nonconducting.

## What does a rating of 40 on a Class B extinguisher mean?

To qualify as a light hazard for the purpose of extinguisher election and placement, the majority of materials in the area must. be noncombustible. What does a rating of 40 on a Class B extinguisher mean. Sufficient extinguishing power for 40 square feet of burning fuel.

## What does 2A 10BC mean?

A fire extinguisher that is rated 2A:10 BC means it has a fire fighting capacity equivalent to: 2.5 Gallons of Water and 10 Square Feet for a BC Type Fire.

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## What are Class B and C fires?

What types of fires can be extinguished with carbon dioxide (CO2) fire extinguishers? Class B fires which involve flammable liquids and gases, solvents, oils, greases (excluding cooking oils/greases in depth) tars, oil-based paints and lacquers. Class C fires which involve energized electrical equipment.

## What is the difference between 5BC and 10BC fire extinguisher?

In our tests, the 10BC units discharged only a fraction of a second longer than the 5BC, hardly “twice” anything. The 10BC, on average, discharged only 25% more fire suppressant than the 5BC.

## What does 3 a 40 bc mean?

3A:40B:C. What do the letters mean in the alpha numeric classification? The letter represents the type of fire that can be put out with a particular extinguisher. Fires are given the following classifications: (A) ordinary combustibles.