Electric shock and safety measures

INTRODUCTION ELECTRIC SHOCK:

Our human body is a conductor.When the live wire is touches the body,current completes its path through body and earth.Hence the muscular function body are paralysed due to the currents action on the nervous system and causing breathing to stop,severe burns and resulting death.

This is the symbol of electric shock is

Prevention and precaution against electric shock:

To prevent electric shock and danger the following precaution should be observed before using the electric equipment's.

1.Always be careful.

2.All electrical equipment's are connected with good quality wires.

3.Before replacing  a blown out fuse always put the main switch off.

4.Always keep the earth connection in good condition.

5.Before using portable electrical things like table fan,iron box heaters etc,see that these are well earthed.

6.Line wires should always be connected through the switch.

7.Replace immediately broken or damaged switches and plug etc.

8.A plug point should never disconnected by pulling the flexible cable.

9.Plug point connection should be made only by plug tops not by bare wires.

10.Check proper working devices.

11.Keep proper condition of electrical hand tools.

The purpose of earthing the electrical equipment's is to bring it to zero potential and thereby to avoid the shock to the operator. 

Due to failure of insulation of a live conductor it may be in contact with the frame of the machine.If the frame is not earthed when somebody is touches the frames of the equipment's they will get shock.

But if the frame of the equipment is earthed the voltage of parted with respect to the earth doesn't rise to dangerously higher value.Thus severe shock is prevented.