Although we can do our utmost to prevent fires from happening by isolating
sources of heat from combustibles and oxygen, it is often
unexpected event that catches us unawares.Carelessness
Sometimes, forgetfulness can result in an accidental fire. Putting a kettle to boil water on a gas stove and forgetting about it can be disastrous. When all
water has evaporated,
kettle becomes red hot, melt and spread
molten metal around.
LP gas leaks are also dangerous. If
fuel-air mixture is in just
right proportion, an explosion can occur when a heat source is introduced in. Many accidents have occurred when a light is switched on in an explosive environment. The correct thing to do then is to free
room of any gas by shutting off
source of
gas and letting in more fresh air into
room.
Chemical reactions can also cause heat and fire. Mixing acids and alkalis, mixing components of some household glue like epoxy resins and hardeners can generate quite a substantial amount of heat that can lead to fires. The containers used and
amount of chemical used can have a great effect on
heat produced. Plastic containers are known to melt and burn when large quantities of thermosetting plastics like epoxies are mixed with hardeners.
Fires are also known to be started by
careless smokers who throw lighted cigarette butts indiscriminately. Many bush fires are started this way. Some areas are especially vulnerable to careless acts like these. People working in
garage at home should be very careful not to cause a fire, especially with open petrol cans and other volatile fuels around them. Sometimes, smokers fall asleep while smoking, and their bed or sofa catches fire. The rubber foam mattress used for bedding can catch fire easily.
Although most electrical equipment is quite safe as far as fire is concerned,
use of sub-standard and poorly designed equipment may give rise to overheating and fires. Carelessness in
area of electrical appliances can cause fires as well as electrical shocks. Many households use multiple power points because they have many electrical equipment that must be used at
same time. Videos, television, fans, radios, and fancy lights may occupy only one electrical socket. When a multiple adapter is used, usually
connection pins cannot be fitted very tightly. The loose power connections are a source of sparking and deterioration of
insulation materials and can lead to fires.
This will be worst if high powered appliances are used because
electrical current drawn from these will be very much higher and so
wires and connections gets hotter.
Preventive Measures
Since we know that all
three conditions of heat, fuel and oxygen must be present in order for a fire to start; our basic fire prevention strategy must be to keep them isolated from each other. Heat sources must be kept away from combustible materials and if possible, from oxygen.
We should take a critical look at all
sources of heat in
home. They are
potential fire hazards. It is good to make an audit of our own homes and make a list, or at least be aware of all
heat sources in
home. Electrical wiring, appliances, gas stoves, kerosene lamps, candles, electrical light bulbs, ovens, electrical kettles, barbecue fires, burning garden refuse, and so on, are some of them. Even spells of dry weather should be looked at with vigilance.
The sources of heat are many. Below are some of
sources of heat that we have to exercise caution, so that we can be especially careful not to let them come into contact with combustibles:
· Kitchen Gas Appliances - The normal appliances in
kitchen are
gas stoves, and
kerosene stoves. These are normally safe, efficient and seldom gives trouble. However,
conditions of
kitchen stoves are often spoilt by spillage of soups, gravies, and other food materials from
cooking processes. After a long time of use, and especially with cooks who do not take special precautions,
gas stove become blackened with carbon, oil and other debris. Gas orifices and nozzles get choked up. Carbon deposits pile up. The carbon deposits become its other source of fuel. The soot fire can burn if it is heated long enough.
The environment in a busy kitchen can make it a fire risk. Gas hoses are especially prone to deteriorate if
material used can be attacked by
presence of oil. Cooking oil is ever present in
kitchen environment. Hoses coated by a layer of oil will produce leaks. Any leak in
gas hoses is dangerous. It can shoot flames of fire all around
place uncontrollably and spread
fire.
Do a regular check on your gas hoses and service your gas stove regularly.
· Electrical Installations and Appliances - Mains electrical wiring and their components can be a hidden source of heat that can cause a fire. Sometimes, due to loose contacts in
terminals of electrical switchboxes, some sparking will occur. If this is not found out early and rectified,
sparking will become worse, and
heat produced becomes more. Carbonization of
insulation materials will occur. Once
carbon gets deposited on
insulation materials, it becomes a conductor of electricity. Short-circuiting of
electrical wiring will occur leading to overheating of
wiring. If
electrical protection devices do not work,
overheating will cause
insulation materials of
wiring to even melt or decompose. When
decomposition gases given out by
insulation materials catch fire,
whole house can be burnt down.
Do a regular check up of your electrical wiring in your house, and quickly call in a qualified electrician to rectify any fault.
Electrical appliances also have to be used properly. When people modify equipment indiscriminately, sometimes they leave out or bypass certain safety features put in by
manufacturer. Appliances can become overheated and cause burning. It is better not to do any modification unless you know what you are doing.
Do not do bypass any safety feature in any electrical appliance.