Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN: 9781337399128
Author: Russell E. Smith
Publisher: Cengage Learning
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- A cylindrical 4 AWG copper wire is coated with NEMA class A insulation. The normal operating temperature of the wire is 50°C. What is the maximum current the wire can carry for 1 second without exceeding the NEMA temperature rating?arrow_forwardQuestion 3 a. Some materials exhibit the property of superconductivity under certain conditions. State what is meant by superconductivity and explain the required conditions for the material to become superconducting. b. The diagram below shows the cross-section of a cable consisting of parallel filaments that can be made superconducting, embedded in a cylinder of copper. copper cylinder filament The cross-sectional area of the copper in the cable is 2.28 x 10-7 m². The resistance of the copper in a 1.0 m length of the cable is 0.075 N. Calculate the resistivity of the copper, stating an appropriate unit. State and explain the what happen to the resistance of the cable when the embedded filaments of wire are made superconductive? i.arrow_forwardA copper conductor has a diameter of 0.6 in and it is 1200 ft long. Assume that it carries a total dc current of 50 A. Find the total resistance of the conductor and the current density. The resistivity of copper is 1.72 x 10-8 2-m.arrow_forward
- Pls, answer no.1 and 2 (show the complete solution and round off final answers to 4th decimal) (write properly pls)arrow_forwardA cylindrical 00 AWG copper wire is coated with NEMA class B insulation. The normal operating temperature of the wire is 40°C. What is the maximum current the wire can carry for 1 second without exceeding the NEMA temperature rating?arrow_forwardPlease answer me fast fast A platinum resistance temperature detector (RTD) is used to measured temperature of the hot gas. The resistance of sensing element is 250.3 ohm when it contact with hot gas. calculate the temperature of the gas. The RTD has a resistance of 120 ohm and 80 ohm at 100°C respectively. The temperature coefficient of platinum is 0.0039 C^-1.arrow_forward
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