Proper grounding is necessary to avoid damage from lightning and power surges. See the
Supplemental Unit Bonding and Grounding Guidelines, on page 167
for grounding requirements.
Caution
AC-Powered Chassis
AC power modules operate in the input range of 180 VAC to 264 VAC, 47 to 63 Hz (nominal input level of
200 to 240 VAC).
Power redundancy requirements vary based on the system configuration (number and type of line cards, etc.).
AC-powered systems are 2N protected. A minimum of two power supplies are required for redundant operation.
Each of the AC power inputs requires a separate dedicated branch circuit. Note that the circuit breaker and
fuse lockout procedures should follow the rules and regulations in the National Electrical Code (NEC) and
any local codes. For a list of the nominal and acceptable value ranges for source AC power, see
Specifications, on page 274
.
The Cisco NCS 4009 chassis supports two types of AC power cords: International and NEMA (USA).
Figure 83: International AC Power Cord (Cisco PID NCS4K-AC-CBL-IEC)
Figure 84: NEMA AC Power Cord (Cisco PID NCS4K-AC-CBL-NEMA)
Before connecting AC input power cords to the power system, make sure that the power cords are not
energized.
Note
Hardware Installation Guide for Cisco NCS 4000 Series
164
Installing Power Components
AC-Powered Chassis
