Assume a bank of heating strips is rated at 22 KW and is connected to 240 volts. The heat strips operate for 4 hours at a time and are located in an area with an ambient temperature of 86 degrees F. The termination temperature rating of the heat disconnect lugs are unknown. Copper conductors with type THWN-2 insulation are to be used because of the environment of the installation to connect the heaters. What size conductors should be used?

Assume a bank of heating strips is rated at 22 KW and is connected to 240 volts. The heat strips operate for 4 hours at a time and are located in an area with an ambient temperature of 86 degrees F. The termination temperature rating of the heat disconnect lugs are unknown. Copper conductors with type THWN-2 insulation are to be used because of the environment of the installation to connect the heaters. What size conductors should be used?

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter15: Dryer Outlet, Lighting, And Receptacle Circuits For The Laundry, Powder Room, Rear Entry Hall,and Attic

Section: Chapter Questions

Problem 16R: An electric dryer is rated at 7.5 kW and 120/240 volts, 3-wire, single-phase. The terminals on the...

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