Shown below are two beams both made from a standard 2 x 8. If each beam is supported at both ends, and if you were to stand in the middle of the beam, which beam would deflect more in the center? Why?
b, it has a smaller area moment of inertia
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Section 404.2(C) requires a grounded conductor be installed at the switch location unless there is a way to install a grounded conductor in the future if one is needed. This means that a three-wire cable with a white grounded conductor instead of a two-wire cable with a reidentified white wire would need to be installed between the lighting outlet and the switch box location. List the situations when this is not required.
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Which of the following are permitted as a rod or pipe grounding electrode if 8 ft in length?
A. 3?4-in. galvanized water pipe B. 5?8-in. galvanized ground rod C. 1?2-in. listed copper clad ground rod D. All of the above