Which open flames cannot be extinguished with water?

Electrical fire

When an electrical fire occurs, the first step is to cut off the power supply.

Never use water or foam fire extinguishers to put out fires when the power cannot be cut off, because both water and foam conduct electricity.

Correct method: Use carbon dioxide, dry powder fire extinguisher or dry sand to put out the fire, and keep a distance of more than 2 meters from electrical equipment and wires.

Oil pan on fire

When an oil pan is on fire, never use water to put it out. This is because water will "fry" when it meets hot oil, causing the oil fire to splash everywhere.

Correct method

1 Quickly pour the cut cold dishes into the pot along the edge, and the fire will automatically go out.

2 Cover the burning oil pan with a pot lid or a large wet cloth that can cover the oil pan, so that the burning oil fire cannot come into contact with air and lack of oxygen to suffocate.

Gasoline fire

The density of gasoline is smaller than that of water. If gasoline is on fire and water is used to put it out, the denser water will sink, while the lighter gasoline will float up. The gasoline floating on the water will continue to burn.

And the gasoline will spread everywhere with the water, expanding the burning area and endangering the safety of other goods and surrounding buildings.

Correct approach: If gasoline catches fire, immediately use fire-fighting tools such as foam, carbon dioxide and dry powder fire extinguishers to put out the fire. It is strictly forbidden to use water to put out the fire.

Fires in high-voltage electrical devices

In the absence of good grounding equipment or power cut-off, water cannot be used to extinguish the fire, which can easily cause short circuits and burns of electrical equipment.

It is also easy for high-voltage current to be transmitted along the water column to the fire-fighting equipment, causing firefighters to be exposed to electricity and cause casualties.

Correct approach

This type of fire requires professional firefighters to put out the fire wearing relevant protective equipment after cutting off the power supply.