Could you please help me out with these questions? Thank You A typical 9 m hydro pole weighs approximately 600 kg – assuming total degradation of the pole and release of all copper to the receiving environment, will this be a problem? Why or why not? How does arsenic or copper act to cause damage to biological systems? Which of these metals is more damaging to the environment?

Could you please help me out with these questions? Thank You A typical 9 m hydro pole weighs approximately 600 kg – assuming total degradation of the pole and release of all copper to the receiving environment, will this be a problem? Why or why not? How does arsenic or copper act to cause damage to biological systems? Which of these metals is more damaging to the environment?

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter7: Luminaires, Ballasts, And Lamps

Section: Chapter Questions

Problem 15R: A good rule-of-thumb to estimate the expected life of a motor, a ballast, or other electrical...

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Using the above example, determine the wire size needed for the 400-ampere service in accordance with the National electrical Code. Assume that the conductors have type THWH insulation. (Note: As a general rule, for each 100 feet of conductor length the wire size is increased one standard size because of voltage drop.)
A good rule-of-thumb to estimate the expected life of a motor, a ballast, or other electrical equipment is that for every ____________ C above rated temperature, the expected life will be cut in __________________.
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a copper bus bar carrying 1200A has a voltage drop of 1.2mV along 24cm of its length. What is the resistance per meter of the bar?
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A cylindrical copper rod having a diameter of 0.40 in has a resistance of 0.00264 Ω. Taking the resistivity of copper as 1.745 µΩ-cm at 20o C, determine the length of the rod in ft. resistance of the rod when it is drawn down to one-third of the initial diameter, the volume remaining unchanged. Assumed that the resistivity of the copper is not affected by the drawing process.
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