How to Choose a Low-Voltage Electrician Fire Extinguisher for Subject 4?
1 Answers
For Subject 4 low-voltage electrician fire extinguishers, carbon dioxide fire extinguishers and dry powder fire extinguishers are recommended. Below are the detailed introductions: 1. Carbon Dioxide Fire Extinguisher: Can be used for live fire extinguishing below 600V. When extinguishing a fire, first carry the extinguisher to the fire location, pull out the safety pin, hold the handle at the base of the horn with one hand, and firmly grip the pressure handle of the opening and closing valve with the other. The firefighter should stand on the upwind side of the fire source, 3 to 5 meters away. For carbon dioxide fire extinguishers without a discharge hose, tilt the horn 70° to 90°, and sweep from near to far at the base of the fire while standing sideways. Do not directly hold the outer wall of the horn or the metal connecting pipe with your hands to prevent frostbite. If the voltage exceeds 600V, remember to cut off the power supply before extinguishing. When used in a confined indoor space, the firefighter should leave quickly after extinguishing to avoid suffocation. 2. Dry Powder Fire Extinguisher: Can be used for live fire extinguishing below 50kV. The most common opening method is the pressure handle method: carry the extinguisher to an appropriate distance from the fire, invert it several times to loosen the dry powder inside. Then aim the nozzle at the most intense part of the fire, pull out the safety pin, press the handle, and the extinguishing agent will spray out. For extinguishers with a discharge hose or stored pressure, the hand should always press the handle without releasing; otherwise, the spray will be interrupted. 3. Foam Fire Extinguisher: The foam from this extinguisher contains a large amount of water, which is conductive and can cause electric shock when used, making it unsuitable for live fire extinguishing.
