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Catalyst 3850 Switch Hardware Installation Guide
OL-26779-02
Chapter 4 Power Supply Installation
Installing a DC Power Supply
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: 20 A.
Statement 1005
Warning
A readily accessible two-poled disconnect device must be incorporated in the fixed wiring.
Statement 1022
Warning
Hazardous voltage or energy may be present on power terminals. Always replace cover when
terminals are not in service. Be sure uninsulated conductors are not accessible when cover is in
place.
Statement 1086
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 (not included in the accessory kit) and ring lug connector in the switch accessory
kit. For a dual-ground connection, also use the dual-ground adapter and dual lug connector.
• 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.
Grounding the Switch
Follow the grounding procedures at your site 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