Service Manual

GSM-205-423
Installing and connecting power and earth cabling
31st Oct 01
Inst. 2–54
Installation & Configuration: Horizon macro indoor
CONTROLLED INTRODUCTION
68P02902W08-B
Installing and connecting power and earth cabling
Overview of
power and earth
cabling
This section describes the procedure for connecting power and earth cabling to
the cabinet.
WARNING
Use the earth stud, located on the interface panel on the
top of the cabinet, to earth the cabinet.
Do not daisy chain cabinet earths together.
Cabinets must be earthed with a conductor capable of
carrying the full fault current of the overcurrent protection
device.
Do not make input power connections at the main power
source at this time. Connecting input power is the final
installation procedure in this chapter.
Power specifications can be found in Chapter 2 Site requirements and
considerations.
Cable routeing
CAUTION Ensure that covers are fitted to any unused connectors on
the cabinet interconnect panel; the covers protect the
connectors from damage by static electricity or foreign
matter.
Do not make dc input power connections at the main dc
power source at this time.
The external converter supplying power to the cabinet
must have double or reinforced insulation between its
primary and secondary circuits.
The external converter that supplies power to the cabinet
must meet safety standard EN 60950.
An adequate means should be provided for routeing cables from the main
power source to the equipment, such as a cable trough or conduit.
NOTE
The current-carrying capacity of a cable for continuous
service is affected by all of the following factors (reference
IEC 364):
– Ambient temperature.
– Grouping.
– Partial or total enclosure in thermal insulating material.
– Frequency (ac only).