HP Surestore 64 Planning Guide - Page 120
Task 14: Plan AC Power
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Task 14: Plan AC Power Plan for facility power sources for each equipment rack. Directors in the rack operate at 50 to 60 Hertz (Hz) and 100 to 240 volts alternating current (VAC), and requires a minimum dedicated 5-ampere service. If two power sources are supplied (optional but recommended for high availability), the equipment rack contains two customer-specified external power cords. Each cord should be connected to a separate power circuit, or both should be connected to an uninterruptable power supply (UPS). Several types of power cables and plugs are available to meet local electrical requirements. WARNING An insulated grounding conductor identical in size, insulating material, and thickness to the grounded and ungrounded branchcircuit supply conductors (except it is green with or without one or more yellow stripes) shall be installed as part of the branch circuit supplying the director. The grounding conductor described shall be connected to ground at the director, or if supplied by a separately derived system, at the supply transformer or motor generator. The plug receptacles near the director shall all be a grounding type, and grounding conductors serving these receptacles shall be connected to ground at the director. Keep all power cables out of high-traffic areas for safety and to avoid power interruption caused by accidentally unplugging the director. 106 Task 14: Plan AC Power