Importance of electrical power in day to day life: 1. Electrical energy is the basic necessity for domestic (residency), commercial, industrial, agriculture, consumers , transport (Electric train), and battery operated vehicle etc. 2. Electricity is also basic necessity for the economic development of a country in fact advanced country is measure by the index per capital consumption of electricity, more it is more advanced countries. 3. We use electricity for various purposes such as: i) Lighting, heating, cooling and other domestic electrical appliances. ii) Street lighting, flood lighting, office building lighting and powering to PC’s etc. iii) Irrigation purpose, operating cold storage, for various agriculture products. iv) Running motors, furnaces of various kinds in industry, running locomotives