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C-2
Catalyst 3750 Switch Hardware Installation Guide
OL-6336-07
Appendix C Connecting to DC Power
Connecting to DC Power
Preparing for Installation
Locate the ground lug and the two number-10-32 screws on the switch rear panel and the DC terminal
block plug in the DC-switch accessory kit.
Obtain these necessary tools and equipment:
• Ratcheting torque screwdriver with a 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-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
• Wire-stripping tools for stripping 6- and 18-gauge wires
Grounding the Switch
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
Caution To make sure that the equipment is reliably connected to earth ground, follow the grounding procedure
instructions, and use a UL-listed lug suitable for number-6 AWG wire and two number-10-32 ground-lug
screws.
To ground the switch to earth ground, follow these steps. Make sure to follow any grounding
requirements at your site.
Step 1 Locate and remove the ground lug and the two number-10-32 ground-lug screws from the rear panel of
the switch. (See Figure C-3 for location.) Use a standard Phillips screwdriver or a ratcheting torque
screwdriver with a Phillips head. Set the screws and the ground lug aside.
Step 2 If your ground wire is insulated, use a wire stripping tool to strip the 6-gauge ground wire to 0.5
inch (12.7 mm) ± 0.02 inch (0.5 mm), as shown in Figure C-1.
Figure C-1 Stripping the Ground Wire
Step 3
Slide the open end of the ground lug over the exposed area of the 6-gauge wire.
Insulation
Wire lead
0.5 in. (12.7 mm)
±
0.02 in. (0.5 mm)
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