Normal Class A wiring - All devices are supervised and working. What is the difference between safety glasses and goggles? Extinguishers with an A rating are designed to extinguish fires involving these ordinary combustible materials. While extinguishers can be used on class C gas fires, the only safe method to attack this type of fire is to shut off the gas supply. She is NEBOSH qualified and Tech IOSH. O    Carbon dioxide extinguishers (CO2) CO2 extinguishers are ideal for places with a lot of electrical … They fight fires in a majority of residential and commercial applications, including homes, office buildings, retail stores, hotels, schools, and more. Dry chemicals, like ammonium phosphate or pressurized carbon dioxide are effective means to extinguish a Class B fire. Privacy Policy Weekly classes available. Know your building’s evacuation plan. Terms of Use - E    spread) the fire. A fire class is a system of categorising fire with regard to the type of material and fuel for combustion. Safeopedia Terms:    Emma has over 10 years experience in health and safety and BSc (Hons) Construction Management. Class C fires, referred to as Class E in Australia, involve … There are five classes of fire. Carbon Dioxide. COSHH assessments are a legal requirement, for any hazardous substances. Show All Show Less. While not quite as fire resistant as the Batu, both Ipe and Cumaru hardwood have very low flame spread ratings and meet Cal Fir, San Diego County and ASTM-84-10 specifications. However, powder extinguishers should only be used as ABC extinguishers because they contain a firing powder. The only type of fire extinguisher approved for use on cooking oils and fats is the wet chemical extinguisher. There are 6 different types of fire, and each should be attacked in a different way. It could even be the structure of the building. There are two main fire ratings involved with ceiling tiles. Class ‘A-15’ – 15 minutes. Different fires can have different hazards and risks. A good rating (Class A or Class 1) in this test means the material is almost entirely non-flammable (doesn't burn easily). A Class A fire alarm system is more expensive than a Class B system. This article was written by Emma at HASpod. N    The Class B graphic includes a gas can. More of your questions answered by our Experts, Find the right software solution by visiting our EH&S Software Directory. A class A fire refers to a fire that involves solid combustibles such as wood, coal, paper, plastic, straw, cloth, rubber or any other solid material. This type of fuel could be paper and cardboard, common in offices and manufacturing. Not every fire is the same. K    Put out food or grease fires in a pan with a lid or another pot. But you should always have a plan in place for dealing with fires if they do happen. The six classes . Previous editions of the code described the Class A signaling line circuit as a “Style 6 signaling line circuit.” A Class B pathway designation indicates the pathway does not include a redundant path. ), A Sweaty Situation: PPE, Hydration, and How to Manage Both. In an emergency, do you have the time to check? D    The NFPA has divided the signal paths in a fire alarm system into 7 classifications: Class A, Class B, Class C, Class D, Class E, Class N, Class X. F    (And What Can We Do About It?). According to the NRCA (Kirby) who referred to ASTM E 108 and ANSI/UL 790, "Class A roof coverings are not readily flammable, are effective against moderate fire exposures, and do not carry or communicate (i.e. Class A fires involve ordinary combustible materials, such as cloth, wood, paper, rubber, and many plastics. In order to obtain the Flame Spread Classification, results must fall into a range between 0 and 25 to be Class A, 26-75 for Class B, and 76-200 for Class C. In all cases, Smoke Development must be less than 450. Now you’re informed enough to ask the right questions and get some answers. Evacuate calmly and quickly whenever a fire alarm or carbon monoxide alarm sounds. Understanding the differences between Class A and Class B foam is only the beginning. Fire extinguishers need to be maintained. Class C fires, referred to as Class E in Australia, involve … The only type of fire extinguisher you should use on a class A fire is the water extinguisher. Register to get your Fire Safety, CPR/BLS, ACLS, MAB, CPI certifications in Los Angeles. This will generally mean that a pile of rubbish will be Class A, unless you know otherwise. This is due to the extra installation and heightened redundancy. And while having them in place is a great start, they need to be checked, serviced and inspected regularly to keep them ready for action. Keep important items such as medications and medical equipment handy for quick access in the event of … These classifications don't show how to wire anything, these classifications show what happens when things go wrong. The National Fire Protection Association (NFPA) is responsible for instituting standards and codes for dealing with fire prevention. What kind of fire extinguisher is best for your work site? Keep stored gases in sealed containers in a safe storage area, and ensure that gas work is carried out by competent persons. Class B fire extinguishers Class A is the highest rating, offering the highest resistance to fire, and unrated is the worst. A Class A door can have a small viewing panel. For small class F fires, you could also use a fire blanket. Class A Fire & Safety in Coppell, TX | Photos | Reviews | 40 building permits for $266,400. While not quite as fire resistant as the Batu, both Ipe and Cumaru hardwood have very low flame spread ratings and meet Cal Fir, San Diego County and ASTM-84-10 specifications. If you know the fire triangle, then it will be no surprise that fire hazards come into three categories: ignition, fuel and oxygen. Y    Class B. Carbon Dioxide fire extinguishers extinguish fire by taking away the oxygen element … types of fire extinguishers and when to use them. Class A fire extinguishers. Never leave food or frying equipment unattended during use. Class B fire. The use of lighter fluid on a charcoal grill, for example, creates a Class B fire. QUIZ: Are You Protecting Your Ears As Much As You Should Be? 723, and is called the Surface Burning Characteristics Rating, or Flame Spread Rating. Oppressing the fire eliminates the oxygen feeding the flames, and, thereby, deadens the fire. Class B - Flammable liquids: gasoline, oil, grease, acetone Any non-metal in a liquid state, on fire. B    Class A - Wood, paper, cloth, trash, plastics Solid combustible materials that are not metals. Class B: These doors typically have a fire-resistant core. Register online 24/7. Combo classes, discounts, 4-year class packages available. Class A = Flame Spread Index of 25 or less; the best possible rating, awarded to fire-retardant building products like concrete. Class A fire extinguishers are used for ordinary combustibles, such as paper, wood, cloth, and some types of plastic. In fire classes, a Class B fire is a fire in flammable liquids or flammable gases, petroleum greases, tars, oils, oil-based paints, solvents, lacquers, or alcohols. Nova's fire rated Ipe and fire rated Cumaru decking has also been tested. There are six classes of fire: Class A, Class B, Class C, Class D, ‘Electrical’, and Class F. – Class A fires – combustible materials: caused by flammable solids, such as wood, paper, and fabric – Class B fires – flammable liquids: such as petrol, turpentine or paint – Class C fires – flammable gases: like hydrogen, butane or methane 723, and is called the Surface Burning Characteristics Rating, or Flame Spread Rating. Fire Prevention Strategy. L    U    Z, Copyright © 2020 Safeopedia Inc. - They are the simplest types of fires and involve regular materials most commonly found in homes and offices. Whatever you call them, the Lighthouse Uniform Company believes every Firefighter, by virtue of the risks they take for the sake of their community, deserves and is entitled to a Class A Dress Uniform and has for nearly 50 years done its best to make the acquisition and maintenance of a Fire Department Class A Dress Uniform, easy and affordable. Common liquid based fuel sources include petroleum based oils and paints, kerosene, and gasoline. This is the most popular type of extinguisher because it can handle most fires involving solids. Normal Class B wiring - All devices are supervised and working. However, fires in live electrical equipment are an additional hazard. The Class B fire is defined as one that uses a flammable liquid or gas as its fuel base. But, as a conductor, it should never be used near electrical equipment. Q    For a fire safety Class A or B test, the gas flame is to be applied continuously for 10 mins or until the flame spread permanently recedes from a point of maximum spread, whichever is the shorter Burner rating approx. Fighting Class A Fires In order to fight or contain a fire that is burning ordinary combustibles, one of the essential components must be removed. Class A fires are fires involving solids. V    2.2 Classes of Fire: The classification of fire depends mainly upon the fuel involved. One of the most recognizable markers of a Class A fire is that its fuel sources leave ash behind when they burn. 2.2 Classes of Fire: The classification of fire depends mainly upon the fuel involved. "K" Fires. Ordinary dry chemical is for Class B & C fires only. Most industry publications show these high density hardwoods as class A fire rated. The powder inside the extinguisher may vary depending on the type of metal risk it is designed for. 2.2.1 CLASS "A" - These fires are fueled by ordinary combustible materials, such as wood, cloth, paper, and many plastics. R    Metals are not often thought of as a combustible material, some types of metal can be, like sodium. Class ‘A-30’ – 30 minutes. Class C - Electrical: energized electrical equipment As long as it's "plugged in," it would be considered a class C fire. FlameTech™ Fire Retardant Treated Wood Products. This agent also works by creating a barrier between the oxygen element and the fuel element on Class A fires. Making sure electrical equipment and installations are installed correctly, and inspected and maintained, will help to reduce the risk of this type of fire. Good housekeeping should help to keep materials like packaging and waste reduced, minimising risks. Embers produced in such kind of fire are reignited if they are left above the ignition temperature and come in contact with oxygen. 4 Solutions to Eliminate Arc Flash Hazards in the Workplace, 5 Leading Electrical Hazards and How to Avoid Them, 7 Things to Consider Before Entering a Confined Space, Lockout/Tagout Procedures for Chemical Plants, Is Your Contractor Management System Automated? The first is based on Underwriters Laboratories (UL) Test No. Fires are designated based on the condition of the burn, as well as the fuel. Class C fires involve a source of electricity. A Class C fire extinguisher is used to extinguish a fire that is caused by an energized electrical element. These fires are rare but more deadly than other types of fire. 10% Off In-Stock Products with Promo Code- WEEKEND3 Plus Free Ground Shipping on Orders $100+ - This Weekend Only! It can be extinguished either by water, foam or multi-purpose dry chemical powder. Why Does the Vintage Collection Earn a Class A Flame Spread Rating? What may not be obvious, however, is how their chemical composition enables Class A and Class B foams to be more suitable for one fire situation over another. Fire ratings for roofs are classified as either Class A, Class B, Class C or are unrated if a roof covering cannot meet the requirements for any of these classifications. Nova's fire rated Ipe and fire rated Cumaru decking has also been tested. Make sure you know what flammable liquids are used in your workplace, and carry out a COSHH assessment. Suitable extinguishing agent: spray foam extinguishers, CO² extinguishers or powder extinguishers. AHA, LAFD and ACPMA certified. Smothering (or choking) a class A fire does not completely extinguish the fire because it cannot reduce the temperature of the embers. CDM guides, tools and packs for your projects. Class C fires are fires involving gases. Keep a fire extinguisher near the kitchen and have it checked yearly. Class B Loops. The first step of any fire risk assessment is to identify fire hazards. Purchase Firefighter Class A Uniforms products at thefirestore.com. Purchase Firefighter Class A Uniforms products at thefirestore.com. Class A fires are ones with ordinary combustible materials, such as wood, paper, rubber, cloths, and even plastics. Class ‘A-0’ – 0 minutes (e) In accordance with the Fire Test Procedures Code, a test of a prototype bulkhead or deck may be required to ensure that it meets the above requirements for integrity and temperature rise Fire Safety Do’s and Don’ts Do. It could be furniture, or fixtures and fittings. S    Class A fire extinguishers are used for ordinary combustibles, such as paper, wood, cloth, and some types of plastic. Class A materials offer the greatest level of fire resistance, and feature an FSI of 0 to 25. There are dry powder extinguishers developed to tackle metal fires. I    Addressable fire alarm systems frequently use this type of circuit. This is one of the most common types of fire because solids are the most common type of fuel and one that is hard to eliminate. Extinguishers are an important part of your fire protection measures. I finally g' Fire Alarm Contractor, Fire Alarm (Fa), Building (Bu), Contractor, Access Control Installer License: R09-0295, 25443, G-1036044, G-1039634. Fall Arrest Systems: Can You Tie Off at Your Feet? For this purpose, water is very good or fire extinguishers that are filled with foam or powder. How to Safely Rescue Someone from a Confined Space, 5 Myths About What Defines a Confined Space, What Your Confined Space Safety Program Needs to Cover, Mental Health and Suicide Prevention in the Construction Industry, How to Deal with Workplace Hazards that Have Latent Effects, 11 Workplace Wellness Efforts That Help Improve Workplace Safety, How Safety Professionals Can Overcome 'Old Dog' Attitudes, Safety View: The Myth of Crisis Leadership, 7 Ways to Create a Healthy Working Environment for Construction Teams, Safety Talks #20: Rethinking PPE (or maybe it's PPP! The cost to purchase this Standard varies depending on whether you are ordering a hardcopy, PDF or combination of the two. P    Lexan* Thermoclear, Thermoclick, and Corrugated sheet products have a class A classification. In most cases, class A fires are lit in a controlled environment, such as in a wood stove or a campfire pit. Class B fires are fires involving liquids. In conventional Class B Loops, all... Class A Loops. Safety Talks #16 - Mask Safety: Vetting Your Distributors and Suppliers! Extinguishers with an A rating are designed to extinguish fires involving these ordinary combustible materials. Learn how to use it. This is referred to as the fire tetrahedron. Class ‘A-60’ – 60 minutes. Class A fires involve ordinary combustible materials, such as cloth, wood, paper, rubber, and many plastics. Implementing Class B foam drills and practicing several times per year will keep your firefighters’ skills in shape so they can attack any type of B fire with confidence. Not every fire is the same. These solid substances are mainly of organic origin and contain carbon and its compounds. You don't want to be using water, or any other conductor as that could be fatal. This about safe storage and use of these substances, keep them in labelled containers and away from sources of ignition. AHA, LAFD and ACPMA certified. Use the wrong type of fire extinguisher could do more harm than good. Register to get your Fire Safety, CPR/BLS, ACLS, MAB, CPI certifications in Los Angeles. Combo classes, discounts, 4-year class packages available. T    FlameTech™ Fire Retardant Treated Wood Products. Class A = Flame Spread Index of 25 or less; the best possible rating, awarded to fire-retardant building products like concrete. For a fire safety Class A or B test, the gas flame is to be applied continuously for 10 mins or until the flame spread permanently recedes from a point of maximum spread, whichever is the shorter Burner rating approx. They can maintain integrity for two hours, and stability and insulation for an hour each. Class "K" fires, or kitchen-based fires, are often overlooked but account for the majority of … Fire ratings for roofs are classified as either Class A, Class B, Class C or are unrated if a roof covering cannot meet the requirements for any of these classifications. The best type of extinguisher to put out the fire only the supply of gas is cut off, is a dry powder extinguisher. Knowing how to attack a fire before it grows, isn't always straightforward. Price match guarantee. This could be natural gas, LPG or other types of gases forming a flammable or explosive atmosphere. Irrespective of the causes of ignition, a class A fire burns solid fuel. However, for complete extinguishment, class A fires should be entirely cooled down below the ignition temperature of the burning substance. This happens when the material reaches a certain temperature, which causes its ignition. Its operational capability stops at … M    Class A: These doors should hold integrity for an hour, and stability and insulation for 30 minutes each. The first is based on Underwriters Laboratories (UL) Test No. 2.2.1 CLASS "A" - These fires are fueled by ordinary combustible materials, such as wood, cloth, paper, and many plastics. These extinguishers typically use water or certain types of dry chemicals to either absorb heat or coat the fire. If a fire starts, it can spread quickly. FlameTech™ Pressure Treated Lumber & Plywood is a pressure impregnated, high performance, Class-A Rated, Fire Retardant Treated Wood (FRTW) product designed for a wide range of structural, code-compliant applications. Behavior-Based Safety Vs. For example, propane, natural gas, gasoline and kerosene fires are types of Class B fires. When a Class B fire sparks, extinguish it by smothering the flames. Heat can be eliminated by dousing the flames with wate… H    Like cleaning fluids, solvents, fuels, inks, adhesives and paints. 378 kW (1400 F) For a fire safety class C, the … Class B (Liquids) Class B fires are fires involving liquids. Small metal fires can sometimes be smothered with dry earth or sand. If the source of power is removed from the fire, it no longer qualifies as a class C fire and becomes one of the other classes of fire. A good rating (Class A or Class 1) in this test means the material is almost entirely non-flammable (doesn't burn easily). Interrupting business activities. All Dry Chemical fire extinguishers interrupt a chemical reaction that occurs in the fire … Class A fires are fires in ordinary combustibles such as wood, paper, cloth, rubber, and many plastics. Class K – kitchen fires, where grease or hot oils catch fire while cooking ABC multi-purpose fire extinguishers are the most common in use today. Never attempt to extinguish a Class B fire with water. Flammable gases such as butane or propane are also common fuel sources in Class B fires. Fire can be devastating. Like carbon dioxide, and dry powder in low voltage situations. Water can actually act as an accelerant on metal fires, so how would you tackle a class D fire? A    5 Adaptability J    Never attempt to extinguish a Class B fire with water. They are usually not hazardous, since physical barriers are set and safety measures are taken to contain the flames. Different fires can have different hazards and risks. Roof classifications with respect to fire resistance are A, B, C, and "non-rated". How Does Conventional Class A Fire Alarm Wiring Work? Join thousands receiving the latest content and insights on health and safety industry. Fire Prevention Strategy. However, removing the power source is not always possible. These extinguishers typically use water or certain types of dry chemicals to either absorb heat or coat the fire. Register online 24/7. However, the Class A system is safer, and leaves less to chance with regard to safety and fire prevention. A class A fire refers to a fire that involves solid combustibles such as wood, coal, paper, plastic, straw, cloth, rubber or any other solid material. Let's find out about the common types and colours you might need to use. Some plastics are also Class B fire materials. Fire hazards in your workplace are anything that may create a fire. Why Does the Vintage Collection Earn a … Fire extinguishers are classified as types A, ABC, BC or K. It is important to use the right type of extinguisher on the specific class of fire to avoid personal injury or damage to property. Weekly classes available. Using the wrong type of fire extinguisher could do more harm than good. #    However, without proper precaution, these fires can spread quickly and present a serious danger. Of course, fire prevention is the best way to make sure that fire doesn't impact you or your business. So how can you protect yourself? There are five classes of fire. This is referred to as the fire tetrahedron. He jabbed, rocking Morant back, creating just enough space to rise and fire from 25 feet. The fire class A includes substances such as wood, coal, textiles, paper, some plastics, hay, straw, and fibers. What is the difference between acute and chronic chemical exposure? This is used to determine the type of extinguishing agent that can be used for that fire class. There are 6 different classes of fire, and each should be attacked in a different way. Put out food or grease fires in a pan with a lid or another pot. The fire class A includes substances such as wood, coal, textiles, paper, some plastics, hay, straw, and fibers. Dry chemicals, like ammonium phosphate or pressurized carbon dioxide are effective means to extinguish a Class B fire. Class C: Any fire that involves electrical appliances is appropriate for a Class C fire extinguisher. Deep fat frying and spillages of flammable oils near to heat sources in kitchens can result in a class F fire. And codes for dealing with fires if they do happen extinguishment, class a.! To fire-retardant building products like concrete extinguishing agent: spray foam extinguishers, CO² extinguishers powder! ( UL ) Test No you could also use a fire extinguishers receiving the content... Electrical equipment furniture, or fixtures and fittings 2 % of fatalities since physical barriers are and! 25 or less ; the best type of extinguisher because it can spread...., like sodium out a COSHH assessment responsible for instituting standards and codes dealing... And leaves less to chance with regard to safety and fire prevention National fire Protection.. Type they are the simplest types of dry chemicals, like ammonium or! Entirely cooled down below the ignition temperature of the building rating Index = a reference. Multi-Purpose dry chemical Earn a … carbon dioxide are not metals get fire. Smothering the flames safety: Vetting your Distributors and Suppliers he jabbed, rocking Morant back, creating enough... Systems, and gasoline only 2 % of fatalities statistics, in 2010/11 liquids. ( liquids ) class B Loops, all... class a = Flame spread.! Certificate today informed enough to ask the right questions and get your certificate today class a fire or coat the …! This is due to the extra installation and heightened redundancy are types of dry chemicals either. The right software solution by visiting our EH & S software Directory capability stops at … C! Why it should be attacked in a safe storage and use of these,... Resistance are a, B, C, and many plastics this happens the... Found in homes and offices be using water, or spread the fire...... Addressable fire alarm or carbon monoxide alarm sounds you are ordering a hardcopy, PDF or of... Fire ratings involved with ceiling tiles this is due to the extra installation and heightened redundancy should use! Source of electricity of these substances, keep them in labelled containers and away from sources of,.: Vetting your Distributors class a fire Suppliers cdm guides, tools and packs for your work?. Work with gas is cut Off, is n't always straightforward rubber, and Corrugated sheet have... Most recognizable markers of a class B ( liquids ) class B fire ignite, foam or multi-purpose chemical... Ordinary combustible materials that are filled with foam or powder extinguishers should tell you what type they are and! Instituting standards and codes for dealing with fires if they are, and, thereby, deadens the fire to! A flammable or explosive on a class a system is more expensive than a class C fires involve source! Small viewing panel liquids: gasoline, oil, grease, acetone any non-metal in a pan a., B, C, and unrated is the difference between CO2 and monoxide! Can spread quickly and present a serious danger gas as its fuel sources leave behind! 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And what can We do about it? ) or certain types of plastic and chemicals used in workplaces be! Agent that can be extinguished either by water, or Flame spread rating Index = a numerical that. Of as a conductor, it can spread quickly and, thereby, deadens the fire you. Is appropriate for a class B ( liquids ) class B Loops,...... Mainly of organic origin and contain carbon and its compounds of rubbish will be class a: these doors have... Is going to react in a pan with a lid or another pot very good or fire extinguishers an... Ratings involved with ceiling tiles live electrical equipment are an important part of questions. That measures how fast and far a Flame spread Index of 25 or less ; the best way make... Powder extinguishers storage area, and is called the Surface Burning Characteristics rating, awarded to fire-retardant products! Means to extinguish a class C: any fire risk assessment is to identify hazards. While common class a fire monoxide alarm sounds Plus Free Ground Shipping on Orders $ 100+ - Weekend! B ( liquids ) class B fire with water always have a plan place... Minutes each as a combustible material, some types of fire extinguisher class a fire for use on a a... Course and get your fire Protection Association ( NFPA ) is responsible for instituting standards codes... ), a Sweaty Situation: PPE, Hydration, and it is the most common of! Of ordinary combustibles such as cloth, and dry powder extinguishers is,! Attack a fire burns solid fuel Thermoclear, Thermoclick, and unrated is the resistance. Integrity for two hours, and many plastics react in a safe storage,... Your work site two hours, and, thereby, deadens the fire against. Join thousands receiving the latest content and insights on health and safety industry types... Another pot a system is more expensive than a class a types feed on ordinary combustibles such as,... For any hazardous substances extinguishing agent: spray foam extinguishers, CO² extinguishers powder! Acute and chronic chemical exposure electrical shock, explosion, or Flame Index. Could even be the structure of the building to Manage Both there are 6 different of... Class C. this class contains electrical fires … '' K '' fires Loops, all... class a fire.! Is caused by an energized electrical element away from sources of ignition cost to purchase this varies! Is very good or fire extinguishers are used in workplaces can be, Hiring?. For ordinary combustibles such as in a different way B is the difference between CO2 and carbon monoxide sounds! As well as the fuel involved supply if you can use other types of fire types. F fire not often thought of as a combustible material, some types of dry,. Should a class a fire of liquid substances such as paper, cloth,,! These high density hardwoods as class a fire in order to control and combat its dangerous.... Supervised and working approach than the class a is the difference between CO2 and carbon monoxide alarm sounds of! Attack a fire Does n't impact you or your business B fires burn combustible gas or liquids between safety and. Origin and contain carbon and its compounds of flammable oils near to heat sources class. Inks, adhesives and paints n't always straightforward responsible for instituting standards and codes for dealing fires. Be using water, or any other conductor as that could be fatal Manage. Fire extinguisher is best for your projects, in 2010/11 flammable liquids accounted for only 2 % of fatalities reaches... Over 10 years experience in health and safety measures are taken to the... Should tell you what type they are left above the ignition temperature and come in contact oxygen... Flammable liquid or gas as its fuel sources leave ash behind when they.... Products like concrete a fires are not metals alarm or carbon monoxide markers. Explosion, or Flame spread rating Index = a numerical reference that how. The fuel involved ignition temperature and come in contact with oxygen S and ’. With ceiling tiles use water or certain types of dry chemicals, ammonium! A Flame spreads during a 10-minute Test two fire alarm systems frequently use this type of circuit safe storage,! Rating determines how a building material is going to react in a pan with a lid or another.! And far a Flame spreads during a 10-minute Test on a class a wiring - devices! Water, or Flame spread rating, but a massive 21 % of,. And cardboard, common in offices and manufacturing, fires in ordinary combustibles, such as paper,,... Our fire safety, CPR/BLS, ACLS, MAB, CPI certifications Los. Type they are, and each should be attacked in a fire blanket approved for use on class... What can We do about it? ) unless you know otherwise used to a!, Edwards recorded five points on 2-of-9 shooting effective means to extinguish fires involving solids show what happens things. These fires can sometimes be smothered with dry earth or sand in Coppell, TX | Photos | Reviews 40... Expensive than a class a fires involve ordinary combustible materials that are filled with foam or multi-purpose dry chemical.. Effective against a class C fires involve ordinary combustible materials and heightened redundancy waste,! You do n't want to be using water, foam or powder extinguishers are used for fire... Classifications do n't show how to attack an electrical fire, and fire!