Specifications

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Cisco ONS 15454 Installation and Operations Guide, R3.2
January 2005
Chapter 1 Hardware Installation
Power and Ground Installation
Warning Shut off the power from the power source or turn off the breakers before beginning work.
Warning This equipment is intended to be grounded. Ensure that the host is connected to earth ground
during normal use.
Caution Always use the supplied ESD wristband when working with a powered ONS 15454. Plug the
wristband cable into the ESD jack located on the lower-right outside edge of the shelf assembly.
Warning Do not mix conductors of dissimilar metals in a terminal or splicing connector where physical
contact occurs (such as copper and aluminum, or copper and copper-clad aluminum), unless the
device is suited for the purpose and conditions of use.
Warning Connect the ONS 15454 only to a DC power source that complies with the safety extra-low voltage
(SELV) requirements in IEC 60950-based safety standards.
Warning The ONS 15454 relies on the protective devices in the building installation to protect against short
circuit, overcurrent, and grounding faults. Ensure that the protective devices are properly rated to
protect the system, and that they comply with national and local codes.
Warning A readily accessible two-poled disconnect device must be incorporated in the fixed wiring.
Cisco recommends the following wiring conventions, but customer conventions prevail:
• Red wire for battery connections (-48V DC)
• Black wire for battery return connections (0V DC)
The ONS 15454 has redundant -48V DC #8 power terminals on the shelf assembly backplane. The
terminals are labeled BAT1, RET1, BAT2, and RET2 and are located on the lower section of the
backplane behind a clear plastic cover. See the “Lower Backplane Cover” section on page 1-15 for
information about accessing the power terminals.
To install redundant power feeds, use four power cables and one ground cable. For a single power feed,
only two power cables (#10 AWG, copper conductor, 194°F [90°C]) and one ground cable (#6 AWG)
are required. Use a conductor with low impedance to ensure circuit overcurrent protection. However, the
conductor must have the capability to safely conduct any fault current that might be imposed.
Note If you are installing power on a Release 3.0 ONS 15454 shelf assembly (15454-SA-NEBS3E,
15454-SA-NEBS3, and 15454-SA-R1, P/N: 800-07149), the #12 to #14 AWG power cable and #14
AWG ground cable are required.