Network Router User Manual

3-16
Cisco 2600 Series Routers Hardware Installation Guide
OL-2171-06
Chapter 3 Installing the Router
Power Connections
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 relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that
the protective device is rated not greater than:
15A, 120VAC (10A, 240VAC). Statement 1005
Connecting Routers to a DC-Input Power Supply
If your router has a DC-input power supply, follow the directions in this section for proper wiring.
Warning This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that
the protective device is rated not greater than:
15A, 60VDC. Statement 1005
Warning Use copper conductors only. Statement 1025
DC Wiring Requirements
Table 3-1 summarizes the wiring requirements for Cisco 2600 series routers with a DC-input power
supply.
Note For installations compliant with the National Electric Code, AWG 14 (2.0 mm
2
) wire is required for DC
input and safety ground wire.
Table 3-1 DC Wiring Requirements for Cisco 2600 Series Routers
Router DC Input DC Input Wire Size
1
1. See the note above this table for National Electric Code wire size requirements.
Safety Ground Wire Size Overcurrent Protection
Cisco 2600 with
1-RU chassis height
–48 to –60 VDC, 4 A
2
2. The input voltage tolerance limits for nominal 48-V power supplies are 38 and 72 VDC.
AWG 18 (1.0 mm
2
) AWG 14 (2.0 mm
2
) 15 A maximum
Cisco 2691 24 - 36 V, 8 A,
positive or negative,
single or dual sources
3
3. The input voltage tolerance limits for nominal 24/48-V power supplies are 18 and 72 VDC.
AWG 18
(1.0 mm
2
)
AWG 14
(2.0 mm
2
)
15 A maximum
36 - 60 V, 4 A,
positive or negative,
single or dual sources
AWG 18
(1.0 mm
2
)
AWG 14
(2.0 mm
2
))
15 A maximum