HP AA988A HP StorageWorks 2012sa Modular Smart Array user guide (488320-002, J - Page 72

■ Site wiring must include an earth ground connection to the AC power source. The supply conductors and power distribution boxes (or equivalent metal enclosure) must be grounded at both ends. ■ Power circuits and associated circuit breakers must provide sufficient power and overload protection. To prevent possible damage to the AC power distribution boxes and other components in the rack, use an external, independent power source that is isolated from large switching loads (such as air conditioning motors, elevator motors, and factory loads). Weight and Placement Guidelines Refer to "Physical Requirements" on page 74 for detailed size and weight specifications. ■ The weight of an enclosure depends on the number and type of modules installed, as shown in Table A-2. ■ Ideally, use two people to lift an enclosure. However, one person can safely lift an enclosure if its weight is reduced by removing the power and cooling modules and drive modules. ■ Do not place enclosures in a vertical position. Always install and operate the enclosures in a horizontal orientation. ■ When installing enclosures in a rack, make sure that any surfaces over which you might move the rack can support the weight. To prevent accidents when moving equipment, especially on sloped loading docks and up ramps to raised floors, ensure you have a sufficient number of helpers. Remove obstacles such as cables and other objects from the floor. ■ To prevent the rack from tipping and to minimize personnel injury in the event of a seismic occurrence, securely anchor the rack to a wall or other rigid structure that is attached to both the floor and to the ceiling of the room. 72 HP StorageWorks 2012sa Modular Smart Array user guide • May 2008