HP 9000 rp7410 Generic Site Preparation Guide - Edition 6 - Page 11

Working Space for Product Access The recommended working space for performing maintenance is 3 feet (0.9144 m) from vendor instructed working area. The work space must permit at least a 90-degree opening of equipment doors or hinged panels. When planning for the working-space area, consider whether access to the product will be at the front, the side, or the rear of the product. If no side service is needed, ensure that there is 3 feet clearance in the front or in the rear. Power Consumption Power consumption can be divided into two broad categories: • Marked electrical amperage, which is listed on the required safety and regulatory labels, generally represents a "worst case" scenario that the customer cannot measure. Use this amperage to size the electrical infrastructure. • Typical consumption, which is measured under normal circumstances, should be used only in customer calculations with UPS and air-conditioning sizing where remaining capacities are needed. - Modern equipment can measure electrical needs and make adjustments to lower electrical usage. - Lowering electrical costs becomes more critical in regions where power distribution may be overburdened. The capability of a product recognizing and reacting to electrical needs is based on processor and firmware generating the action from the products engineered parameters. This was not possible on products manufactured prior to 2007. The electrical infrastructure will continue to dictate a maximum. In addition to the HP product hardware, you must consider any peripheral equipment that will be installed during initial installation or a later update. See the safety and regulatory labels on equipment or applicable product-specific documentation for such devices to determine the power required to support these devices. NOTE: Peripheral equipment should have dedicated breakers. Electrical Load Requirements (Circuit Breaker Sizing) IMPORTANT: Local authority has jurisdiction (LAHJ) must determine the final decision regarding adherence to country-specific electrical codes and guidelines. It is good practice to derate power distribution systems for the following reasons: • To avoid nuisance tripping from load shifts or power transients, do not run circuit protection devices continuously above 80% of their root-mean-square (RMS) current ratings. • Safety agencies derate most power connectors to 80% of their RMS current ratings. Power Quality HP products operate over a wide range of voltages and frequencies. (See the HP Corporate Power Standard HP-00005-03 at http://standards.corp.hp.com/smc/hpstd/pdf/F-HP0000503.pdf.) The products are tested and shown to comply with EMC Specification EN50082; however, damage can occur if these ranges are exceeded. Severe electrical disturbances can surpass the design specifications of the equipment. Sources of Voltage Fluctuations Voltage oscillations affect the quality of electrical power. Common sources of these disturbances are: Electrical Factors 11