HOME FORWARD BACK LAST SLIDE FIRST SLIDE Effects of Electrical Accidents Although safety precautions have been taken sometimes accidents still happen. The effects of electrical accidents are electric shock, burns, fire and explosion.
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Effects of Electrical Accidents
Although safety precautions have been taken sometimes accidents still happen.
The effects of electrical accidents are electric shock, burns, fire and explosion.
Effects of Electrical Accidents
Electrical shock occurs because of inadequate insulation, poor earthing or the the usage of a damaged circuit breaker.
There are there categories of electric shock based on the amount of current that flows into the victim’s body.
A. Electric ShockHOME
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Effects of Electrical Accidents
Current rating Effects1mA Mild electrical shock
10mA Mild electrical shock that causes burns and loss of muscle control
100mA and higher
Electric shock that could be fatal
The table shows the current rating and the effects of electric shock
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Electrical Shock happens when students disobey the rules.
Effects of Electrical Accidents
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Burns caused by electrical wire short circuit.
Effects of Electrical Accidents
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C. Fire ( occurs when there is current overflow )
Effects of Electrical Accidents
3. Class C
2. Class B
1. Class A Wood, paper and fabric.
petrol, oil, diesel and turpentine .
Gasses such as methane, butane and other flammable gasses.
4. Class D Metal – based fires
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Fire caused by electrical failures are classified into various classes depending
on:
Effects of Electrical Accidents
where the wiring or the electrical installation was undertaken
the type of material used.
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Fire caused by electrical failures are caused by:
Effects of Electrical Accidents
a. Non-functional insulated cables causing short circuits.
b. Faulty earthing systemc. Failure of the protection mechanism to
function such as the fuse value being too high, overloading etc.
d. Electrical sparkse. Faulty lightning arrestor
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Fire can controlled by using the appropriate fire extinguishers.
Effects of Electrical Accidents
There are four different types of fire extinguishers.
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Substance of the fire
extinguisherwater Chemical
bubblesCarbon Dioxide
gas
Dry powder
Case colour Red Light Yellow
Black Light Blue
Uses Class A Class A and B
Class B,C and D
Class A, B, C and
D
Effects of Electrical Accidents
The fire extinguisher types and their uses
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Here are the examples of fire extinguisher.
The rules and regulations of using the fire extinguishers are show on the cases.
Effects of Electrical Accidents
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D. Explosion
Effects of Electrical Accidents
Explosion occurs because of electrical failures mostly by short circuits between life and neutral
cables
A big and uncontrolled fire may result in loss of life and the destruction of
property.
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