For an office building, a 208Y/120V power panel has the following loads: Receptacles with a total load of 30.00 kVA at pf = 0.90 Heaters with a total load 12.00 kVA at pf = 1.00 a. Determine the proper frame size and trip rating for the power circuit breaker protecting the panel. Assume an available short-circuit current of 35,000 A at the panel. b. Size the equipment grounding conductor (Cu) for the panelboard.

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HVDC

HVDC stands for high voltage direct current in the electric power transmission system. The high voltage direct current system uses direct current (DC) for the transmission of electrical power through transmission lines in contrast with the alternating current that is the AC system. The HVDC is used to transmit bulk power point-to-point through long distances transmission lines. Power is rapidly transferred because the efficiency of transmission lines is greatly increased over long distances due to HVDC lines.