【 Weak current College 】 water extinguishing fire on electric devices of several methods

In the special conditions or any other fire extinguishing agent, how to use water for fire-fighting water conductivity,? the DC gun of the water fight with live electrical equipment for fire-fighting personnel, is harmful to the body. Therefore, in fire-fighting equipment in a live situation, we usually have to cut off the power, then fighting. However, as a result of production or other reasons cannot cut off the power, you need a live fire.
When a charged fire-extinguishing water, charged body and injection of water, water gun, the human body and the ground will form a current loop, the loop of the current size of the human body have a direct impact on safety. If we add the water, the water gun on the current directly into the Earth, human plus insulation protection system, you can protect the safety of the personnel of the fighting. Here are several live fire with water.


1. in metallic water gun nozzle installed earth wire
Earth wire available section 5-10mm, long 2-5m of copper wire. Grounding rods available around iron 1m or iron, fighting personnel wear insulated gloves and insulated rubber boots.

In a charged fire-extinguishing water gunman before, should be grounded to end firmly attached to the metal water gun nozzle, the other end of the connection with the grounding rods, and the grounding rods into the underground O.5 meters, if Earth wire with other grounding connection request contact good, holding the position of the hands when the gun must be placed in the Earth lead back, select the distance with charged bodies, then shooting water fight.

2. wear are bent

Currently used are bent in two ways: one is the cotton fiber or copper animal fiber and yarn twisting of knit interweaving of cloth, cotton by electroless copper or silver. Both are bent in cotton or cotton inside, contains a large component of metal conductors. Use made of this material are you including: hats, gloves, clothing, socks, shoes, etc, and the sole is made of conductive rubber. In wear are subdued, be sure to put clothes, gloves, socks and shoes as well between the two clips, which are screwed together of copper wire, forming a well grounded and, depending on the voltage of the size selected water distance, using metal water gun shooting water fight.

3. wear insulated gloves, insulated boots

Wear insulated gloves and insulated boots when a charged fire with water, to select the most experienced water gunmen, maximize water gun nozzle to the distance between the charged body, to take measures to prevent water drops into the gloves and rubber boots, insulation Board, for the fire, to point the way water falling on fire. In General, it is best not to use the full water column directly to the fire, to prevent danger.

4. using the spray water

In DC gun muzzle on a two-stage centrifugal installed spray head, shall become the two-stage centrifugal spray gun. This water gun shoot out of the water flow of atomization of good, almost not conductive. Experiment proves that, when the water gun nozzle distances 127 kV charged body 5 m, and 7 kg per square centimetre for live fire under hydraulic pressure, there is no leakage of water flow, its range of up to 8-9 metres.

This fog nozzle for live-fire, water gun can not grounded, direct live fire. But according to the size of the selected range of voltage, fire pump pressure per square cm should be maintained for 5-7 kg, and in the water gun out of the normal spray water before the charged body that put out the fire.