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Catalyst 3750-X and 3560-X Switch Hardware Installation Guide
OL-19593-01
Chapter 3 Power Supply and Fan Module Installation
Installing a DC Power Supply
Warning
An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure
that no exposed portion of the DC-input power source wire extends from the terminal block plug.
Statement 122
Warning
Before connecting or disconnecting ground or power wires to the chassis, ensure that power is
removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel
board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch
handle of the circuit breaker in the OFF position. Use a voltmeter to test for 0 (zero) voltage at the
power terminals on the chassis.
Statement 196
Warning
This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that
the protective device is rated not greater than: 20 A.
Statement 1005
Warning
A readily accessible two-poled disconnect device must be incorporated in the fixed wiring.
Statement 1022
Note The grounding architecture of this product is DC-isolated (DC-I)
Equipment That You Need
• Ratcheting torque screwdriver with a number-2 Phillips head that exerts up to 15 pound-force inches
(lbf-in.) of pressure.
• Panduit crimping tool with optional controlled-cycle mechanism (model CT-720, CT-920,
CT-920CH, CT-930, or CT-940CH).
• Wire-stripping tools.
• 12-gauge copper ground wire (insulated or not) for the single-ground connection.
• 8-gauge copper ground wire (insulated or not) for the dual-ground connection.
• Ground lug screw and ring lug connector in the switch accessory kit. For a dual-ground connection,
also use the dual-ground adaptor and dual lug connector from the DC power supply accessory kit.
• Four leads of 14-gauge copper wire.
• Four fork-type terminals from the DC power supply accessory kit. The terminals must be the proper
size for M3 screws in a Dinkle DT-35-B25-style terminal block.
