An electric water heater has a rating of 1 kW,230 V. The coil used as the heating element is 10m long and has a resistivity of 1.724 x 10^-6 ohm- cm. Determine the required diameter of the wire in mils?

An electric water heater has a rating of 1 kW,230 V. The coil used as the heating element is 10m long and has a resistivity of 1.724 x 10^-6 ohm- cm. Determine the required diameter of the wire in mils?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter29: Dc Generators

Section: Chapter Questions

Problem 1PA: You are working as an electrician in a large steel manufacturing plant, and you are in the process...

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Question

An electric water heater has a rating of 1 kW,230 V. The coil used as the
heating element is 10m long and has a resistivity of 1.724 x 10^-6 ohm-
cm. Determine the required diameter of the wire in mils?

the answer is 2.52 mils (according to ECE board exam answer keys) I don't know how to get it. Can you show me?

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