when is a CO2 extinguisher not suitable for a electrical fire?
926162
I think I would be concerned about the use of CO2 to fight an electrical fire if any of the following conditions existed:\n\n1. You had to fight the fire in a confined space and build-up of discharging CO2 gas could pose an asphyxiation risk.\n\n2. If a large amount of other burning materials were present that CO2 is not rated to extinguish.  Like Class "A" or "D" fires. (Fires involving flammable metals or large amounts of wood, paper, or trash.)\n\n3. If the fire was too large to fight with a portable unit.  Fire extinguihsers are designed to extinguish small fires, if the fire is too large, or you cannot fight the fire with your back to your exit, then do not take the chance.\n\nThat's my take.
218869
hypothetically yes. suppose there r high tension electric wires & due to dew electric current passed in air & causes a fire on some paper, trees, oil etc.
698578
Don't listen to the above post. CO2 is not flammable, and you are not necessarily asking for it to be pressurized. The cheapest way to get bottled CO2 is to catch the products of a combustion. I would try to suck the smoke of burning coal into a bottle. Another way is to make your own carbonic acid by blowing air from your lungs into watter. Of course using these cheap methods you'll never get a good sample (eg, humans breathe out about 20% CO2). Perhaps there is a way to get rid of all the gasses?\n\nActually, there are "air sponges" that absorb certain gasses. If you could pump air though enough of these filters to take out all the gasses you don't want, you could be left with pure CO2.
328983
Not possible because three conditions have to be present for fire to occur.  Fuel, oxygen, and heat.  Remove any or all (in this case, heat due to the freezing) and the fire goes out.
198904
Depending on the damage it could be the pressure isn't being released.  This can lead to a big explosion if it exceeds the pressure limits for the cooker.
621573
Foams are primarily used on fires involving flammable liquids.  Foam is still water based, so you would never want to use it on an electrical fire!\n\nAs mentioned in a couple other answers, foam cuts off the oxygen supply to a fire and it also has a cooling effect, like water.  It's particularly suited to suppress flammable liquid fires because of it's foamy nature.  The foam "floats" over the surface of the burning fuels covering and cooling the area.  Most flammable liquids are lighter than water, so using water alone could actually spread the fire!
781262
Insufficient oxygen available for complete combustion.  The preferred reaction is of the hydrogen portion of the fuel compound with O2, leaving most or some of the carbon uncombined.  You apparently are referring to gas burners but the same is true in oil lamps.  \n\nhttp://www.lampguild.org/Default.html?Defaulttext.shtml&1
925364
Definitely not water, as those three metals will burn on contact with water (and potassium will explode.) Liquid CO2 might do, as it would cool the burning material extensively, possibly below the ignition point. The sand (SiO2) would be a smothering agent. I'm not sure about the carbon tet.\n\n5 NOV 06, 1522 hrs, GMT.
815925
I agree, yes fireworks 'should' be used only at organised events... \nFireworks are very dangerous, last year the neighbours were setting them off in their garden and one came directly into our kitchen (through the open door) and severly burnt  my sons arms.\nI too have been to organised forework displays and seen teens throwing lit fireworks into the crowds of people watching them, then running off before getting caught...that really scared me, this year i'm staying indoors out of harms way!!
661131
Oh boy.  There's no doubting it when it happens.  Depending on the size they will catch fire and you'll smell a combination of copper and ozone.  It will give out a typical pulse signal however some of the pulses may be missing or it won't produce power at all.
177504
It can be.  The electrical arcs will be searching out a potential path to ground, which may be anything conductive within reach of the discharge surface.   Watched a demonstration of one in a classroom once, it began arcing to the metal tracks holding up the suspended ceiling tiles.  Had there been anything flammable in the ceiling, it could have started a fire.
39553
I don't know the specific name for it, but, in telecommunications, there is a certain type of plastic used for insulating wires.  This insulation is known as self extinguishing, in that, as heat is applied to it and it gets to the point where it starts to try to burn, it releases some kind of gas that extinguishes the combustion that is beginning to take place.
431639
Spontaneous combustion?
134869
If you mean one that  puts out fires, that is going to be quite a challenge. You must start with a robot that can move around and then locate heat.
386954
Yes, it could be used, for two reasons.\n\nFire requires three components to occur,these are Fuel,Heat and Oxygen.\nRemoving any one of these will extinguish a fire.\nLiquid nitrogen would actually remove two, thus making it twice as effective!\n\nHope this helps.
934268
There are four general classifications of fires and extinguishing agents Class A Class B, Class C, and Class D. The floor for hazard B has to be 2 hr rated. Usually if on the ground floor then 6 inch concrete is adequate but check with your local fire marshal.
576874
Only in case of fire.