Question

in case of a fire before the firemen uses of water hoses they shut off the main electricity supply of the area explain why they do this​

Answer 1

As impure water is a good conductor of electricity. if the main electrical supply is kept on , there are changes that the water may spill over it and the chances to get an electric shock increases .

Answer 2

Answer:

In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area because water sprayed from the hose might conduct electricity which may come in contact with the electrical appliances which increases the chance of electricity passing through wire. This may hurt fire man.