HOUSEHOLD ELECTRIC CONNECTIONS AND DANGEROUS IN DEALING WITH ELECTRIC CURRENT

 House hold electric circuit



The pictorial representation of household electric circuit is given in the below diagram.

Tree system 

Generally, for the household connection two lines are taken from the distribution system as shown in the diagram. Starting from the left hand side of the diagram, one red and one black line connection is provided to a house, red line represent live line or phase line and the black line represent neutral line. Initially they are connected to watt hour meter which is used to measure the current used in that particular house for billing purposes. From there earthing should be done, which is shown in the diagram in green colour.

Colour code of household electric wires and potentials difference between them

As we mentioned above there are three lines in household electrical circuit-  live line(phase line), neutral and earth line. For live which is also known as phase line we have to use red coloured wire. For neutral line, black wire is used. And for earth line we have to use green coloured wire.
Potential difference is factor responsible for current flow. Therefore for proper current flow there should be a potential difference between this wires. 
  • The potential difference between live line and neutral live is 230V
  • The potential difference between live line and the earth is also 230V
  • The potential difference between neutral line and earth is 0V

Dangers in dealing with electric current 

Electrical energy is an essential part of our day today life, but it is dangerous to deal with electric current without proper precautions and knowledge. Accidents due to electric shock resulted in sever injuries or often leads to death itself. Electric shock may occurs when we touches bare wires or cables with damaged insulation or when lightning strikes 
1) If we come in contact with a live line and neutral line at same time resulted in electric shock because potential difference between live line and neutral line is 230V, So current will pass through our body 
2) If we are standing in earth and touches live line alone also resulted in electric shock because potential difference between live line and the earth is also 230V.

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