Fire fighting with electricity
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Fires are sudden and unpredictable; what safety considerations should be taken into account when attempting to extinguish them while they are still active in order to buy time?
What method should be used to put out the fire? At least water cannot be used…… Use dry ice or sand, etc....
Use a dry powder fire extinguisher – that’s all you need. It’s just difficult to clean up
First, cut off the power! It’s much easier from here on; depending on the situation, different substances can be used to extinguish the fire!
Gas fire suppression is the best option; a heptafluoropropane system or a carbon dioxide system； Dry powder is difficult to clean, and it is corrosive when mixed with water. :)
If extinguishing a fire involving electricity is necessary, water or foam should definitely not be used; carbon dioxide is the best choice for this purpose, and it is usually available in ordinary factories.
When choosing a fire extinguisher, it’s not just about whether the fire is electrical; what’s crucial is the type of material on fire.
Under normal circumstances, the power should be turned off first, followed by using a carbon dioxide fire extinguisher to put out the fire.
First, turn off the power; things will be easier from there. If it’s not possible to turn off the power, then liquid fire extinguishers such as foam or water-based ones cannot be used. Instead, gas-based fire extinguishers or dry powder fire extinguishers should be employed.
Wear rubber boots and gloves, etc. Water cannot be used to extinguish the fire; only dry powder, sand, etc., can be used, of course depending on the nature of the fire as well. Generally speaking, this situation should not occur; first, the power supply should be turned off before attempting to extinguish the fire
I also looked up some information and came up with the question based on that. Generally, live fire extinguishing (for electrical equipment) is applied when it is too late to cut off the power, that is, in situations where power cannot be disconnected for certain reasons or other constraints. Key points to note ； 1. Choose an appropriate fire extinguisher; carbon dioxide, dry powder, 1211, and the like are all suitable. Because the extinguishing agents in these fire extinguishers are non-conductive. 2. When using a water gun to extinguish fires, it is advisable to use a spray-type water gun; such guns have a lower leakage current in their water jets, making them safer for use in extinguishing electric fires ； When using a regular straight water gun to extinguish fires, to prevent the leakage current in the water stream from passing through the human body, the nozzle of the water gun can be grounded ； Firefighters can also operate by wearing insulated gloves and insulated boots, or by donning equalization suits. 3. Maintain a necessary safety distance between the human body and live electrical conductors. When using water to extinguish a fire, the distance between the nozzle of the water gun and the live conductor should be no less than 3 meters for voltages of 110 KV or less, and no less than 5 meters for voltages of 220 KV or more. When using a suitable fire extinguisher to put out the fire, the minimum distance between the body of the extinguisher and the nozzle and the live conductor should be no less than 0.4 meters for 10 KV systems, and no less than 0.6 meters for 36 KV systems. 4. When extinguishing fires involving overhead lines and other aerial equipment, the elevation angle between the person’s position and the live conductors should not exceed 45 degrees, to prevent the conductors from falling and endangering the safety of those fighting the fire. 5. In the event that a live wire falls to the ground, a safety zone should be established to prevent injury from step voltage. Please point out any discrepancies in the above content; thank you.