User's Manual
Table Of Contents
Rack Requirements Chapter 2: Installing the Simulcast Subsystem Hardware
Rack Requirements
Most communications equipment is installed in a standard 48.26 cm (19-in.) EIA rack
or enclosed cabinet. Refer to the manufacturer’s instructions when installing racks or
cabinets, and installing equipment into the rack or cabinet.
Use all supplied bracing hardware when installing a rack or cabinet and secure
all equipment within a rack or cabinet.
If additional equipment needs to be installed, refer to the system design document provided by
the Field Engineer or consult the Motorola Field Representative.
Bonding and Grounding
Cabinets and equpment racks include a rack grounding bar (RGB) with the capacity to terminate
numerous solid or stranded 6 AWG copper ground wires, which are associated with internal metallic
or fiber optic cables and external grounding to power company equipment.
You must ground all doors of a metal cabinet by bonding the door to the main cabinet
using a 6 AWG (minimum) copper wire.
The RGB is shipped with dual-hole lugs to terminate 2 AWG ground wires. The minimum
number of dual-hole attachments is system dependent and is specified by the customer. This
bar provides electrical continuity between all bonds and ground wire with a current carrying
capacity equal to or exceeding that of a 6 AWG copper wire.
See the Standards and Guidelines for Communication Sites (68P81089E50) for more
information on proper bonding and ground at a site.
Power Requirements
The Standards and Guidelines for Communication Sites (68P81089E50) defines the guidelines
and requirements for cabinets, which house equipment that requires AC power input. Some
of the guidelines and requirements are as follows:
• The cabinet is designed to accept 120/240 V, single-phase power with an amperage
service as required by the electronic equipment.
• Cabinets serviced by commercial power must be equipped with a nationally
recognized test laboratory (NRTL) certified power distribution panel that contains
a main circuit breaker or individual circuit breakers of the correct size as required
for the electronic equipment or specified by the customer.
• A decal showing an electrical schematic of the power wiring must be affixed
to the inside surface of the cabinet.
• All AC power equipment and electrical components must conform to National
Electrical Manufacturers Association (NEMA) and National Electrical Code
(NEC).ThesemustalsobelistedbyanNRTL.
2-10 68P81003Y71-O November 2002