User's Manual Part 1

Power, Earth Ground, and Battery Cabling

DRAFT

1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU

Jun 2004

3-4

Objective

The objective of this procedure is to install the power and earth ground

cabling for the BTS at the site.

Dangerous voltages, capable of causing death, are present

in this equipment. Use extreme caution when handling and

testing this equipment.

WARNING

Grounding Considerations

This procedure covers only the grounding information for the cable that

attaches to the BTS.

Motorola recommends that you use an oxide inhibitor such

as Burndy PENETROXt or Ilsco DE–OXt on all the

external ground connections on the unit and on the site I/O

interface for all outdoor installations. This includes the

ground connections on the mounting bracket, the Site I/O,

and the lugs on the customer–supplied site I/O interface.

NOTE

Above Ground

For ground rings and the interconnection of internal and external ground

rings, #2 AWG or larger is required. For grounding of equipment and

miscellaneous metallic objects, #6 AWG miminum is required.

Exceptions – Connection from an isolated ground bar (IGB) to master

ground bar (MGB) is accomplished using #2 AWG as a minimum. The

external ground bar (EGB) is grounded through a 2–inch wide, 16–gauge

copper strap, if available; otherwise, 2–#2 AWG wires can be used. If the

#2AWG wires are used, then they must be connected at opposite ends of

the EGB and have a minimum separation of 12–inches between them.

Below Ground

All wire must be #2 AWG as a minimum. Ground rods are to be a

minimum of 8 feet long and 5/8–inch in diameter. In the case of a deep

basement next to the rod, the rod must be long enough to extend 3 feet

below the basement floor.