Cisco 3750 - Manual (Page 44)

3-4
Catalyst 3750 Metro Switch Hardware Installation Guide
OL-9160-02
Chapter 3 Connecting the Power Supply
Connecting to DC Power
Connecting to DC Power
To connect the switch to a DC-input power source, follow these steps:
1. Preparing for Installation, page 3-4
2. Grounding the Switch, page 3-5
3. Installing the DC Power Supply in the Switch, page 3-7
4. Wiring the DC-Input Power Source, page 3-9
Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Statement 1003
Warning This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that
the protective device is rated not greater than:
15 A, 80 Vdc Statement 1005
Note We recommend that you use 18 AWG copper wiring for Network Equipment Building Systems (NEBS)
installation. This guideline follows the standard guidelines for DC power wiring in the Central Office.
Preparing for Installation
Locate the terminal block plug that ships with the DC power supply.
Obtain these necessary tools and equipment:
• Ratcheting torque screwdriver with a Phillips head that exerts up to 15 pound-force inches (lbf-in.)
of pressure
• Panduit crimping tool with optional controlled cycle mechanism (model CT-700, CT-720, CT-920,
CT-920CH, CT-930, or CT-940CH)
• 6-gauge copper ground wire (insulated or noninsulated)
• Four leads of 18-gauge copper wire. The DC terminal block also accepts 12-28 AWG copper wire
(see
Figure 3-11 on page 3-9 ).
Note We recommend that you use 18 AWG copper wiring for Network Equipment Building Systems
(NEBS) installations. This guideline follows the standard guidelines for DC power wiring in the
Central Office.
• Wire-stripping tools for stripping 6- and 18-gauge wires