Connect Dc Power Supply To Power Source - Cisco 8800 Series Hardware Installation Manual

Connect DC Power Supply to Power Source

Warning
Statement 1030 Equipment Installation
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Warning
Statement 1005 Circuit Breaker
This product relies on the building's installation for short-circuit (overcurrent) protection. To reduce risk of
electric shock or fire, ensure that the protective device is rated not greater than: 300V, 30A.
Connect DC Power Supply to Power Source
This section contains the procedures to connect the DC source power cables to a DC-powered router.
For DC power cables, we recommend that you use 60-A-rated, high-strand-count copper wire cables. The
length of the cables depends on your router location from the source power. DC power cables are not available
from Cisco, but they are available from any commercial cable vendor.
You must terminate DC power cables using cable lugs at the power tray end. Ensure that the lugs are dual-hole
and that they fit over M6 terminal studs at 0.625-inch (15.88-mm) centers. For #4 AWG cable, use Panduit
part number LCD4-14AF-L or equivalent; for #6 AWG, use Panduit part number LCD6-14AF-L or equivalent.
If you are not using power redundancy or are using n+1 power redundancy, you can connect all the power
supplies in the chassis to the same power grid on the rear end of each power tray. If you are using n+n power
redundancy, connect one redundant grid to one of the power supply inputs and the other redundant grid to the
other power supply input on the back of the power tray as shown for each power supply.
The color coding of source DC power cable leads depends on the color coding of the site DC power source.
Ensure that power source cables are connected to the power module with the proper positive (+) and negative
(–) polarity:
• Sometimes, the source DC cable leads might have a positive (+) or a negative (–) label. This is a relatively
Caution
DC power modules contain circuitry to create a fault condition on the power module if the power module
detects a reverse polarity condition. No damage should occur from reverse polarity, but ensure to correct a
reverse-polarity condition immediately.
Note The length of the cables depends on the location of your router in relation to the source of DC power. These
cables and the cable lugs that are used to attach the cables to the router chassis are not available from Cisco
Systems. They are available from any commercial cable vendor.
Hardware Installation Guide for Cisco 8800 Series Routers
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safe indication of the polarity, but you must verify the polarity by measuring the voltage between the DC
cable leads. Be sure that the positive (+) and negative (–) cable leads match the positive (+) and negative
(–) labels on the power module when making the measurement.
Powering on the Router