3-12
Cisco 3700 Series Routers Hardware Installation Guide
OL-2180-08
Chapter 3 Installing the Router
Power Connections
Connecting Routers to AC Power
If your router uses AC power, connect it to a 15 A, 120 VAC (10 A, 240 VAC) circuit with overcurrent
protection.
Note
The input voltage tolerance limits for AC power are 85 and 264 VAC.
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
Caution
To comply with Telcordia NEBS GR-1089-Core and EN 300386 requirements, you must use foil
twisted-pair cable that is properly grounded at both ends.
Connecting Routers to a DC-Input Power Supply
Warning
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Statement
1003
Warning
Use copper conductors only.
Statement
1025
Note
The installation must comply with the 1996 National Electric Code (NEC) and other applicable codes.
If your router has a DC-input power supply, follow the directions in this section for proper wiring.
A router with a DC-input power supply has a terminal block for the DC power connections.
Depending on the type of router you are installing, see one of the following procedures:
•
Wiring the DC-Input Power Supply in Cisco 3725 Routers, page 3-12
•
Wiring the DC-Input Power Supply in Cisco 3745 Routers, page 3-17
Wiring the DC-Input Power Supply in Cisco 3725 Routers
If your Cisco 3725 router has a DC-input power supply, follow the directions in this section for proper
wiring.