Page 14 - Electrician - TT (Volume 1)

ELECTRICIAN - CITS ELECTRICIAN - CITS

MODULE 1 : Safety Practices

LESSON 1- 4: Safety rules - safety signs

Objectives

At the end of this lesson you shall be able to:
• explain the necessity of safety rules
• explain how to treat a person for electric shock/injury
• state the effects of a fire break out and causes of fire in workshop
• state the methods of operation of fire extinguishers of extinguishing of fire
• list the tools necessary for an electrician.

Electricity is invisible: Therefore, while working in electrical installations one should always first take care of
one’s own safety. A little carelessness can result in an accident, which many times can be fatal. Therefore,
electricity needs certain precautions of handling it to avoid danger. The following “Do Nots” (precautions) should
always be observed before starting work on electrical equipment and apparatus :

i Do not forget that electric shocks are generally received by the worker and can be avoided. Be careful.
ii Do not forget to put off the main switch (if near it) in the case of a person still in contact with a live conductor
or apparatus.

iii Do not attempt to disengage a person in contact with a live apparatus which you cannot switch off immediately.
Insulate yourself from the earth by standing on a rubber mat or dry board of wood before attempting to get him
clear. Even then do not touch his body; push him clear with a piece of dry wood.

iv Make sure electrical equipment is properly connected, grounded and in good working order.
v Do not access, use or alter any building’s electrical service, including circuit breaker panels, unless you are
specifically qualified and authorized to do so.

vi Always switch-off before replacing a blown fuse.
vii Replace the fuse according to the capacity. Don’t wire it for more capacity than it is desired.
viii In case of electrical wire, put the main switch off immediately if you can do it, never throw water on the fire or
the live conductor. It is dangerous because water is good conductor of electricity. Throw dry sand or dust on
the fire. Use fire extinguisher but before use make sure that it is suitable for that purpose. Liquid CO2 or CCL4
extinguisher or general ly use.
ix Do not forget to put on your safety belt before starting work on a pole. If a ladder is used, it must be held by
another person to avoid slipping.

x Do not forget to discharge the overhead lines by earthing or by other suitable means.
xi Do not forget to connect a switch on a live conductor.
xii Do not forget to earth all metallic coverings of the electrical wiring installation.
xiii Do not add water to acid while preparing an electrolyte. Always add acid to water.
xiv Do not bring a naked flame near an accumulator. Also keep the room where the accumulator is housed well
ventilated.
xv Do not forget that safety depends upon good earthing; so always keep the earth connections in a good
condition.

PB 1