Part A A total of 3900 W of power is to be supplied through the wires of a flat to the household electridal appliances. If the potential difference across the group of appliances is 230 V, determine the cross-sectional area of the thinnest permissible wire that can be used. Express your answer to millimeters squared. ? ΑΣφ A mm? %3D Part B Suppose the wire used in this fat is of the size found in part A and has total length 44.0 m At what rate is energy dissipated in the wires? Express your answer in watts. P- 90.11 W • Part C The consumer cost of electrical energy is £0 125 per kilowatt-hour If the flat was built with wire of the next larger cross- sectional area than that was found in part A what would be the savings in electricity costs in one year? Assume that the appliances are kept on for an average of 12 hours a day Express your answer in pounds. saving in electricity costs = 18.5 £ per year

Part A A total of 3900 W of power is to be supplied through the wires of a flat to the household electridal appliances. If the potential difference across the group of appliances is 230 V, determine the cross-sectional area of the thinnest permissible wire that can be used. Express your answer to millimeters squared. ? ΑΣφ A mm? %3D Part B Suppose the wire used in this fat is of the size found in part A and has total length 44.0 m At what rate is energy dissipated in the wires? Express your answer in watts. P- 90.11 W • Part C The consumer cost of electrical energy is £0 125 per kilowatt-hour If the flat was built with wire of the next larger cross- sectional area than that was found in part A what would be the savings in electricity costs in one year? Assume that the appliances are kept on for an average of 12 hours a day Express your answer in pounds. saving in electricity costs = 18.5 £ per year

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter10: Using Wire Tables And Determining Conductor Sizes

Section: Chapter Questions

Problem 4PA: Using the above example, determine the wire size needed for the 400-ampere service in accordance...

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