What type of fire extinguisher should be used for electrical fires

Electrical fires are classified as Class C fires.

Therefore, ammonium phosphate dry powder fire extinguishers, sodium bicarbonate dry powder fire extinguishers, halide alkane fire extinguishers or carbon dioxide fire extinguishers should be selected for electrical fire sites, but carbon dioxide fire extinguishers equipped with metal horn spray canisters should not be selected.

In addition, there are many types of fire extinguishers, which can be divided into the following according to the way they move

hand-held and cart-based; According to the power of the fire extinguishing agent, it can be divided into: gas cylinder type, pressure storage type, chemical reaction type, and according to the filled fire extinguishing agent, it can be divided into: foam, dry powder, halide alkane, carbon dioxide, acid and alkali, water, etc.

The types of fires are divided into the following 5 categories according to the ignition substance and its combustion characteristics:

Class A fire: refers to the fire of burning carbon-containing solid combustibles, such as wood, cotton, wool, linen, paper, etc.

Class B fire: Nails, B and C liquids, such as gasoline, kerosene, diesel, methanol, ether, acetone, etc.

Class C fire: refers to the fire of combustible gas, such as gas, natural gas, methane, propane, acetylene, hydrogen, etc.

Class D fire: refers to the fire of combustible metals, such as potassium, sodium, magnesium, titanium, zirconium, lithium, aluminum-magnesium alloys, etc.

Dry chemical fire extinguishers, carbon dioxide fire extinguishers, and water-based fire extinguishers should be used to extinguish electrical fires.

Electrical fires are generally used to extinguish electrical fires, dry powder fire extinguishers, carbon dioxide fire extinguishers, and there are also water-based fire extinguishers that can extinguish electric fires.

Electrical fires belong to Class C fires, and Ammonium phosphate dry powder fire extinguishers, sodium bicarbonate dry powder fire extinguishers, halide fire extinguishers or carbon dioxide fire extinguishers should be selected for Class C fire sites, but carbon dioxide fire extinguishers equipped with metal horn canisters should not be selected.

Please click to enter** to describe the precautions for the use of the fire extinguisher.

Precautions for the use of fire extinguishers1. When using a fire extinguisher, it must be sprayed at a position about a meter away from the fire source.

2. When using a fire extinguisher, it should be noted that it must be sprayed at the root of the fire source, so as to effectively extinguish the fire.

3. When using a fire extinguisher, pay attention to standing in the direction of the fire source and spraying in the direction of the windwind.

With the continuous development of science and technology, today's fire extinguisher has become a portable tool for extinguishing fire. Inside it is a number of chemicals that can be used to extinguish fires, and it is a very common fire prevention facility nowadays. So, what fire extinguisher can be used in the event of an electrical fire?

In the event of an electrical fire, you can use a dry chemical fire extinguisher, carbon dioxide and carbon tetrachloride fire extinguisher, but you must keep a sufficient distance during use, for example, for equipment below 10kV, you must keep a safe distance of more than 40cm. In addition, if the electrical equipment catches fire during operation, then the fire must be extinguished before the power supply is staged.

Characteristics of electrical fires.

1. It is seasonal.

Electrical fires mainly occur in the two seasons of summer and winter. Due to the high temperature in summer and the high amount of electricity, it is easy to cause the temperature of the electrical equipment used to rise, destroy the insulator in the equipment, and eventually lead to the occurrence of fire. The winter is cold, and the humidity of the air is very low, which is easy to generate electric charge, and when dry things are in contact with the air and rubbing, static electricity will be generated, which will eventually lead to the occurrence of electrostatic fire.

2. Time-sensitive.

Electrical fire has a temporal nature, because the night use of more electricity, and some enterprises are also produced at night, in the start, operation and shutdown of electrical equipment in the frequent operation and use, will be due to insulation damage, poor contact or overload operation and other reasons caused by dangerous factors, if negligence does not carry out inspection, then it will indirectly increase the possibility of electrical fire accidents.

Article summary: The above is all about what fire extinguishers can be used in the event of an electrical fire and what are the characteristics of electrical fires, I hope it will be helpful to you. If you want to know more about it, please stay tuned to Qeeka Home.

The fire of electrical equipment is mainly caused by short circuit and overload of electrical equipment, which belongs to Class E fire. According to the "Code for the Configuration and Design of Building Fire Extinguishers" GB50140, ammonium phosphate dry powder fire extinguishers, sodium bicarbonate dry powder fire extinguishers, halide alkane fire extinguishers or carbon dioxide fire extinguishers should be selected for Class E fire sites, but carbon dioxide fire extinguishers equipped with fiber and metal horn canisters shall not be selected. According to the Montreal Convention agreement, the use of halide fire extinguishers has been banned in China, and the residues after the dry powder fire extinguisher extinguish have a certain fouling effect on electrical equipment, and it is best to choose portable carbon dioxide fire extinguishers, portable heptafluoropropane fire extinguishers and other clean gas fire extinguishers as auxiliary fire extinguishers.

In addition, according to the "Code for Fire Protection Design of Buildings" GB50016, the power distribution room is required to do gas automatic fire extinguishing system, and the special shed is a high-rise building power distribution room is mandatory to do gas automatic fire extinguishing system. Generally, the fire extinguishing system of the distribution room should include the following parts: smoke detection device, temperature detection device, sound and light alarm bell alarm device, gas discharge lamp indication device, gas fire extinguishing controller, automatic pressure relief valve, gas fire extinguishing device.

Nianhai Fire was destroyed by the Soviet Union, you can ask.

Hello dear, carbon dioxide, carbon tetrachloride and dry chemical fire extinguishers are available. When electrical equipment catches fire during operation, the power supply must be cut off before extinguishing. If power is not cut off quickly, fire extinguishers such as carbon dioxide, carbon tetrachloride, 1211 fire extinguishers or dry chemical fire extinguishers can be used.

When using, a sufficient safety distance must be maintained, and the distance should not be less than 40cm for equipment below 10kv and magnanimity. When extinguishing electrical fires that have not cut off the power supply, the following fire extinguishers need to be used: carbon tetrachloride fire extinguisher - it has a good fire extinguishing effect on fires in electrical equipment, carbon tetrachloride does not burn, and it does not conduct electricity.

Carbon dioxide fire extinguisher - most suitable for extinguishing fires in electrical and electronic equipment, carbon dioxide has no corrosive effect and will not damage equipment. Dry powder fire extinguisher - it combines the advantages of carbon tetrachloride and carbon dioxide, and is suitable for extinguishing electrical fires, and the fire extinguishing speed is changed quickly. Note that acid-alkali or foam fire extinguishers should never be used, because the fire extinguishing liquid is conductive, and the person holding the fire extinguisher will be electrocuted.

Electrical fires are classified as Class C fires.

Selection of Class C fire extinguishers: Class C fire sites should choose ammonium phosphate dry powder fire extinguishers, sodium bicarbonate dry powder fire extinguishers, halide fire extinguishers or carbon dioxide fire extinguishers, but carbon dioxide fire extinguishers equipped with metal horn canisters should not be selected.

Chemistry. Reactive type, according to the filled fire extinguishing agent can be divided into: foam, dry powder, halide alkane, carbon dioxide, acid and alkali, water, etc.

The three types of fire extinguishers, ABC, BC and BCD, correspond to the following five fire types respectively.

The types of fires are divided into the following 5 categories according to the ignition substance and its combustion characteristics:

Class A fire: refers to the fire of burning carbon-containing solid combustibles, such as wood, cotton, wool, linen, paper, etc.

Class B fire: Nails, B and C liquids, such as gasoline, kerosene, diesel, methanol, ether, acetone, etc.

Class C fire: refers to the fire of combustible gas, such as gas, natural gas, methane, propane, acetylene, hydrogen, etc.

Class D fire: refers to the fire of combustible metals, such as potassium, sodium, magnesium, titanium, zirconium, lithium, aluminum-magnesium alloys, etc.

At present, dry powder fire extinguishing agents on the market are generally divided into two categories: BC dry powder and ABC dry powder, and BCD dry powder for extinguishing class D fires is rarely produced now; Although the fire extinguishing efficiency of ultra-fine dry powder is far greater than that of ordinary ABC dry powder, its fire extinguishing category is the same as that of ordinary ABC dry powder fire extinguishing agent, which can extinguish ABC fires and live equipment fires.

1. BC dry powder fire extinguishing agent: BC dry powder can extinguish BC fire. It is suitable for the initial fire of flammable and combustible liquids, gases and live equipment, and is not suitable for the fire of solid substances.

Therefore, in the power distribution room, kitchen, computer room and other places prone to combustible liquid gas fire and live fire, BC dry powder fire extinguishing agent can be equipped. But these sites are often not simply liquid and gas fires; Therefore, most of these places are also equipped with ABC dry chemical fire extinguishing agents.

2. ABC dry powder fire extinguishing agent: this kind of fire extinguishing agent can extinguish solid, liquid, gas and live equipment fires, and has the widest range of applications. It can be used in all kinds of public places, offices, hotels, restaurants, cars, ships and even homes, but it shall not be used to extinguish metal fires.

At present, there are many places that should be equipped with ABC dry powder fire extinguishing agent, but they are mistakenly equipped with BC dry powder; For example, some hotels are equipped with fire extinguishers are all BC dry powder, and from the comprehensive study of the fire situation, most of the hotel fires are combustible solid material combustion, at this moment if the BC dry powder fire extinguisher is used to extinguish the fire, the effect will not be significant, and may even delay the fire extinguishing time, resulting in greater economic losses.

1. If there is a fire in electrical products below 6kv, carbon dioxide fire extinguishers can be used.

2. If there is a fire in electrical products of 10kv and below, it is recommended to use carbon tetrachloride fire extinguisher.

3. Dry powder fire extinguishers and 1211 fire extinguishers are suitable for extinguishing any fire of live products.

To extinguish electrical fires, the first choice is to use a dry chemical fire extinguisher.

To extinguish electrical fires, the first choice is to use a dry chemical fire extinguisher, which is the best safety. This is followed by carbon dioxide fire extinguishers, 1211 fire extinguishers and other fire extinguishers. Never use a foam fire extinguisher.

The dry powder does not burn, does not form a conductive medium, and has no corrosive effect, making it very effective against electrical fires. On the contrary, foam fire extinguishers have conductive fire extinguishing liquid, and they will strongly corrode electrical equipment, and they are not easy to clean afterwards, so they are not suitable for electrical fires. If the incident is sudden, you can't find a non-conductive dry powder or carbon dioxide fire extinguisher for a while, you can also use a "stupid method" such as dry sand cover to extinguish the fire, don't splash water, water can conduct electricity, which may cause a short circuit or electrocution, leading to worse results.

There are many types of fire extinguishers, and the more common fire extinguishers on the market are foam fire extinguishers, dry powder fire extinguishers, carbon dioxide fire extinguishers and halide fire extinguishers (1211) and so on.