System Installation Guidelines; Wiring Connections - HP BL685c - ProLiant - 4 GB RAM Site Planning Manual

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Add a grounding grid made of copper strips mounted to the subfloor. The strips should be 0.8 mm
(0.032 in) thick and a minimum of 76 mm (3.0 in) wide. Connect each pedestal to four strips using
6-mm (0.25-in) bolts tightened to the manufacturer's torque recommendation.
Equipment grounding implementation details
Connect all HP equipment cabinets to the site ground grid as follows:
Attach one end of each ground strap to the applicable cabinet ground lug.
1.
Attach the other end to the nearest pedestal base (raised floor) or cable trough ground point
2.
(nonraised floor).
Check that the braid contact on each end of the ground strap consists of a terminal and connection
3.
hardware (a 6-mm [0.25-in] bolt, nuts, and washers).
Check that the braid contact connection points are free of paint or other insulating material and
4.
treated with a contact enhancement compound (similar to Burndy Penetrox).

System installation guidelines

In domestic installations, install the proper receptacles before the HP equipment arrives. For installation
procedures, see the appropriate installation guide.

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 can compress or
deform the hardware and cause it to weaken. This deformation usually leads to high impedance,
preventing circuit breakers from tripping when needed or contributing to a buildup of high frequency
noise.
CAUTION:
serious problems, such as erratic equipment operation. A high impedance connection
overheats and sometimes causes fire or high temperatures that can destroy hard-to-replace
components such as distribution panels or system bus bars.
Connections that are too loose or too tight can have a high impedance that causes
Power requirements and considerations 38