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Catalyst 3750-E and Catalyst 3560-E Switch Hardware Installation Guide
OL-9774-03
Chapter 3 Power Supply and Fan Module Installation
Installing a DC-Power Supply
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.
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)
Preparing for Installation
Obtain these necessary tools and equipment:
• Ratcheting torque screwdriver with a number-2 and a number-1 Phillips head that exerts up to
15
pound-force inches (lbf-in.) or 240 ounce-force inches (ozf-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 noninsulated) when using the single-ground connection.
• 6-gauge copper ground wire (insulated or noninsulated) when using the dual-ground connection.
• Ground lug screw and lug ring in the switch accessory kit. For a dual-ground connection on 24- and
48-port switches, also use the dual-ground adaptor and dual-hole lug from the DC power supply
accessory kit.
• Four leads of 16-gauge copper wire.
• Four round eyelet terminals or four fork-type terminals from the DC power supply accessory kit.
Grounding the Switch
To make sure that the equipment is reliably connected to earth ground, follow the grounding procedure
instructions and observe these warnings:
Warning
This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the
absence of a suitably installed ground conductor. Contact the appropriate electrical inspection
authority or an electrician if you are uncertain that suitable grounding is available.
Statement 1024
Warning
When installing or replacing the unit, the ground connection must always be made first and
disconnected last.
Statement 1046