14:- Types of wire 
Aim :- to kown about types of wire
Requirement :- all types of wire
1) Single core wire :- three core , two core , four core , multi standard  wire .
2) Two core wire :- it is use to carry phase and neutral connection it is made up of aluminum
     as well as multi standard .
3) Three core wire :- it is use to carry phase and neutral connection it is made up of aluminum  which is use to connect the machine .
4) Four core wire :- this wire can be used as phase , neutral or three phase one neutral.
5) Multi standard wire :-  this wire is not thin then compared to others wires it is made up
     of copper which is used in household wiring.