Cisco 3845 Quick Start Guide - Page 17

Connecting the Router to DC Power, DC Wiring Requirements for Cisco 3800 Series Routers - power supply

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Page 17 highlights

Warning AC connected units must have a permanent ground connection in addition to the power cable ground wire. NEBS-compliant grounding satisfies this requirement. Statement 284 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 The following warning applies to both AC power supplies and AC power supplies with IP phone power in the Cisco 3825 router and Cisco 3845 router: Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than: 120 VAC, 15 A (240 VAC, 10 A). Statement 1005 Note This product requires surge protection to be provided as part of the building installation. To comply with the Telcordia 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 22. 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 Note 60 VDC, 20 A applies to DC power in Cisco 3825 routers and 60 VDC, 30 A applies to DC power in Cisco 3845 routers. Warning Use copper conductors only. Statement 1025 17

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17
Warning
AC connected units must have a permanent ground connection in addition to the power cable ground wire.
NEBS-compliant grounding satisfies this requirement.
Statement 284
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
The following warning applies to both AC power supplies and AC power supplies with IP phone power in the Cisco 3825 router
and Cisco 3845 router:
Warning
This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that the
protective device is rated not greater than:
120 VAC, 15 A (240 VAC, 10 A).
Statement 1005
Note
This product requires surge protection to be provided as part of the building installation. To comply with the Telcordia
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 22.
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
Note
60 VDC, 20 A applies to DC power in Cisco 3825 routers and 60 VDC, 30 A applies to DC power in Cisco 3845
routers.
Warning
Use copper conductors only.
Statement 1025