Cisco 3800 Series Quick Start Manual - Page 18

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Also for Cisco 3800 Series: Datasheet (8 pages), Application Note (41 pages), Troubleshooting Manual (15 pages), Datasheet (20 pages), Configuring (32 pages), User Manual (7 pages)

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Cisco 3800 Series Quick Start Manual
120 VAC, 15 A applies to AC and AC-IP power supplies in Cisco 3825 and Cisco 3845 routers.
Note
This product requires surge protection to be provided as part of the building installation. To comply with the Telcordia
Note
GR-1089 NEBS standard for electromagnetic compatibility and safety, an external surge protective device (SPD) is
required at the AC power service equipment.

Connecting the Router to DC Power

If your router has a DC-input power supply, follow the directions in this section for proper wiring. If backup power is required,
see the "Connecting the Router to Backup Power" section on page 23.
DC Wiring Requirements for Cisco 3800 Series Routers
Caution
DC return is isolated from the frame (NEBS DC-I).
Warning
This product requires short-circuit (overcurrent) protection, to be provided as part of the building installation.
Install only in accordance with national and local wiring regulations. Statement 1045
Warning
This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the
protective device is rated not greater than:
60 VDC, 20 A. Statement 1005
Warning
This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the
protective device is rated not greater than:
60 VDC, 30 A. Statement 1005
60 VDC, 20 A applies to DC power in Cisco 3825 routers and 60 VDC, 30 A applies to DC power in Cisco 3845
Note
routers.
Warning
Use copper conductors only. Statement 1025
A Cisco 3800 series router with a DC-input power supply requires copper wire for the power connections. Table 1 and Table 2
summarize the DC wiring requirements.
If you connect dual DC power sources to a Cisco 3825 router, both sources must be the same polarity and voltage.
For a Cisco 3845 router, the safety ground wire connection must be at the same potential as the 0 V (return) connection.
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