General Site Preparation Guidelines; Electrical Factors; Synopsis; Ac Electrical Distribution System - HP 9000 rp3410 Manual

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 G1
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.
1
environments. This
Electrical Factors 7