how many types of pvc pipes?
A CO2 fire extinguisher works by eliminating oxygen and replacing it with CO2. You could do the same thing with just about any non-oxidizing gas (nitrogen, for example), but carbon dioxide is inexpensive and easy to store.CO2 works best on class B and class C fires. They don't work very well on class A fires because the material usually reignites. CO2 extinguishers have an advantage over dry chemical in that they leave behind no harmful residue. Class A B and C fires are: Class A fires are ordinary materials like burning paper, lumber, cardboard, plastics etc. Class B fires involve flammable or combustible liquids such as gasoline, kerosene, and common organic solvents used in the laboratory. Class C fires involve energized electrical equipment, such as appliances, switches, panel boxes, power tools, hot plates and stirrers.
CO2 and O2 are very different compounds. In simple terms, CO2 will blow all the combustible oxygen away from the area. I think oxyhydrogen flame can't be extinguished by CO2 because it's so hot. Any fire that's hotter than the energy required to decompose CO2 won't be extinguished by it, but no, CO2 will never enlarge a fire. It's like when you breathe. Like us, fires need O2, and they produce CO2 just like we do when we exhale. You can breathe in CO2, but your body can't use it. In the same way, although CO2 won't extinguish all fires, it will never feed a fire. Hope that helps.
A fire needs 3 things, oxygen, heat and fuel. Remove one of these and you put the fire out. CO2 removes the O2 from the area. It is very cold also. You can not put out a metal fire such as magnesium with an extinguisher. The O2 in the CO2 is held tightly, it could not enlarge a fire.
In CO2 the carbon is combined with all the oxygen it can take and so it is not combustible (ie. it does not burn). When we direct CO2 from a fire extinguisher on to a fire, it forms a blanket over it, as it is heavier than air. The fire is then deprived of oxygen and is extinguished. It is not possible for CO2 to enlarge a fire.
Complicated question Best to hire an qualified electrician. Depending on where you live and what type of soil you have, grounding can be very different, but for normal (not too sandy) soil, you can purchase electrical ground rods at electrical supply stores or Home Depot. To be very safe, first call your local utility company to see what agency might need to come check where your gas lines etc are buried to be sure you don't hit anything. Drive the ground rod into the ground with a sledge hammer (hopefully your ground isn't too hard), close to the incomming meter base (assuming that is where the ground wire is). Also buy a clamp to clamp the ground wire back to the new ground rod. After that is done you should have a littel better protection. However, someone also needs to check all the outlets in the houses to make sure they were grounded properly when installed. There are also passive, whole house surge arrestors that can be installed between the meter base and the house main breaker panel to shunt big electrical surges to ground.
