3. An electric radiator is required to dissipate 1 kW when connected to a 220 V supply. If the coils of the radiator are of wire 0.5 mm in diameter having resistivity of 70 µn-cm, calculate the necessary length of the wire.

3. An electric radiator is required to dissipate 1 kW when connected to a 220 V supply. If the coils of the radiator are of wire 0.5 mm in diameter having resistivity of 70 µn-cm, calculate the necessary length of the wire.

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter27: Service-entrance Equipment

Section: Chapter Questions

Problem 32R

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Concept explainers

Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.

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3. An electric radiator is required to dissipate 1 kW when connected to a 220 V supply. If the coils of
the radiator are of wire 0.5 mm in diameter having resistivity of 70 µ0-cm, calculate the necessary
length of the wire.

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