Filter
Top Products
Appendix C
Site Preparation
System Installation Guidelines
109
System Installation Guidelines
This section contains information about installation practices. Some common pitfalls are highlighted. Both
power cable and data communications cable installations are discussed.
NOTE In domestic installations, the proper receptacles should be installed prior to the arrival of
Hewlett-Packard equipment. Refer to the appropriate installation guide for installation
procedures.
Wiring Connections
Expansion and contraction rates vary among different metals. Therefore, the integrity of an electrical
connection depends on the restraining force applied. Connections that are too tight compress or deform the
hardware and causes it to weaken. This usually leads to high impedance causing circuit breakers to trip.
CAUTION Connections that are too loose have a high resistance that cause serious problems, such as
erratic equipment operation. A high resistance connection overheats and sometimes causes fire
or high temperatures that can destroy hard-to-replace components such as distribution panels
or system bus bars.
Wiring connections must be properly torqued. Many equipment manufacturers specify the proper connection
torque values for their hardware.
Ground connections must only be made on a conductive, nonpainted surface. When equipment vibration is
present, lockwashers must be used on all connections to prevent connection hardware from working loose.
Data Communications Cables
Power transformers and heavy foot traffic create high energy fields. Route data communications cables away
from these areas. Use shielded data communications cables that meet approved industry standards to reduce
the effects of external fields.