9. A 1500 W heating element at an initial temperature of 15°C is connected to a supply voltage of 115 v. After the temperature of the element has been stabilized (steady- state conditions), it is found that a voltage of 125 volts is required to maintain rated output. If the temperature coefficient of the element is 0.0006 per •c, determine the element's final temperature. e. 300°C 1. 205°C g. 290°C h. 317°C 10. Calculate the length of the copper wire having a diameter of 1/16 inches and resistance of 2 ohms.

EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN:9781337516549
Author:Simmons
Publisher:Simmons
Chapter19: Special-purpose Outlets-water Pump, Water Heater
Section19.2: Water Heater Branch Circuit
Problem 8R: For residential water heaters, the Consumer Product Safety Commission suggests a maximum temperature...
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9. A 1500 W heating element at an initial temperature of 15°C
is connected to a supply voltage of 115 V. After the
temperature of the element has been stabilized (steady-
state conditions), it is found that a voltage of 125 volts
is required to maintain rated output. If the temperature
coefficient of the element is 0.0006 per °C, determine the
element's final temperature.
e. 300°C
1. 285°C
g. 290°C
h. 317°C
10.
Calculate the length of the copper wire having a
diameter of 1/16 inches and resistance of 2 ohms.
Conductivity of copper is 5.8 x 10' S/m.
a. 229.4 m
b. 218.2 m
c. 232.2 m
d. 248.1 m
Transcribed Image Text:9. A 1500 W heating element at an initial temperature of 15°C is connected to a supply voltage of 115 V. After the temperature of the element has been stabilized (steady- state conditions), it is found that a voltage of 125 volts is required to maintain rated output. If the temperature coefficient of the element is 0.0006 per °C, determine the element's final temperature. e. 300°C 1. 285°C g. 290°C h. 317°C 10. Calculate the length of the copper wire having a diameter of 1/16 inches and resistance of 2 ohms. Conductivity of copper is 5.8 x 10' S/m. a. 229.4 m b. 218.2 m c. 232.2 m d. 248.1 m
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