Instruction manual

POWER AND GROUNDING
POWER AND GROUNDING
General
This section provides information on power, grounding, lightning protection, sneak current protec-
tion, standby power, and wiring requirements for system and associated peripheral equipment
installed in the equipment room.
AC Power Requirements
The following section provides AC power and grounding requirements for DEFINITY Generic 1
and Generic 3 systems.
Multi-Carrier Cabinet System
The customer must provide the main AC distribution panel (panel board). Any available power
source can be used, as long as the phase or leg provides 120-volt AC or 208-volt AC between
any two legs or phases at the required current drain. The panel board must be equipped with a
bolt-on 50-amp 120-volt or 208-volt thermal magnetic circuit breaker for each cabinet. One of the
following panel boards, or equivalent, can be provided:
QMR fusible panel board by General Electric
QMB fusible panel board by Square D
VB5 fusible panel by ITE
FPD fusible panel by Westinghouse
Each system cabinet, along with the auxiliary cabinet, requires a separate power outlet. These
outlets must not be shared with other equipment, must not be under switch control, and should
be located outside the cross-connect field area, if possible. Individual requirements are as fol-
lows:
PPN cabinet and EPN cabinet—Each cabinet requires a special 120-volt 60-Hz 50-amp
power outlet (NEMA 5-50R or equivalent) or a special 208-volt 60-Hz 30-amp power
outlet (NEMA L6-30R or equivalent). The outlet must be located within 10 feet of the
cabinet.
Auxiliary Cabinet (optional)—This cabinet requires a special 120-volt 60-Hz 20-amp
power outlet (NEMA 5-20R or equivalent) or a special 208-volt 60-Hz 30-amp power
outlet (NEMA L6-30R or equivalent). The outlet must be located within 12 feet of the
cabinets.
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