Engineering, 12.03.2021 15:00 paras29
A commercial building is served by a 400 ampere, 120/208 volt three phase wye electrical system, and the service entrance conductors are 500 Kcmil copper with type THW insulation. The 5/8 inch steel reinforcing bars in the foundation are welded together and used as the grounding electrode for the service. The minimum size copper grounding electrode conductor permitted is AWG numbe
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A commercial building is served by a 400 ampere, 120/208 volt three phase wye electrical system, and...
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