HP 9000 Superdome SX2000 Generic Site Preparation Guide - Edition 6 - Page 7

1 General Site Preparation Guidelines This guide contains recommendations and best practices to improve site efficiency and tolerance before installing or operating any Business Critical products. The Best Practices found in this document closely align with third party engineering, such as the ISA G11 environments. This general information is intended for different product models and customer sites around the world and is not a substitute for recommendations or requirements from the manufacturer of a specific product. G1 environments and HP's controlled computer room are parallels. This guide does not replace vendor printed Product Specifications, but generalizes to a room level. NOTE: See the specific product service guide for the guidelines required to support the specific product. The following information provides general principles and practices to consider before installing or operating the system. These guidelines apply to all customer environments that an HP product is likely to be installed in: • Controlled computer room • Controlled office • Uncontrolled office/home • Light industrial • Mobile/portable However, the implementation of these guidelines will vary from customer to customer and from one environment to another. Information provided through this guide is designed to make the user aware of the following: • Product specifications from the manufacturer have overall priority and cannot be changed. • The HP Generic Site Preparation Guide will not replace the product specifications. • Third (3rd) Party specifications will not replace the product specifications (some 3rd Party sources are known to contain errors). • Higher room temperatures are discretionary but business risks will increase. Electrical Factors Synopsis AC Electrical Distribution System HP recommends use of an electrical distribution system that exceeds normal electrical guidelines. This recommendation is based on experiences with HP customers who have a low occurrence of unexpected interruptions. As your system availability needs increase, these recommendations become more important. Recommended electrical distribution hardware includes receptacles, AC wiring, conduits, and breakers that are sized for maximum-rated loads, rather than for typical loads. Do not exceed 75 feet (23 m) between the receptacle and nearest X0 bond and the transformers because connection points can become loose over time and subject to loading problems. HP recommends using a higher input voltage to the stepdown transformer within 75 feet (23 m). For example, if 480-volt current is available in the building, ensure that distribution transformers in the data center are 480/208-volt stepdown. In an optimum electrical distribution system: 1. HP Controlled Computer Room is equal to the Instrumentation, Systems, and Automation Society (ISA) Class G1, which states: Mild- Corrosion is NOT a factor in determining equipment reliability. Electrical Factors 7