hope ut helps :)
1) because electrical appliances uses electrical energy to work an if metal are given in the handles they will give shock to the user .
2) user should wear an insulating material.
user shouldn't have a wet hand.
a distance should be maintained.
here is your answer..
The materials which do not allow electricity to flow through them are known as insulatars or bad conductors of heat and electricityMOVING ON...
The handles of electric appliances or cooking utensils are made up of insulatars so that they do not allow the flow of electricity and it becomes easy to hold them..
hope it helps...