■ Ensure that you have taken the necessary precautions to prevent ESD damage
(see “Preventing Electrostatic Discharge Damage” on page 138).
■ Ensure that you have connected the switch chassis to earth ground.
CAUTION: Before you connect power to the switch, a licensed electrician must attach
a cable lug to the grounding and power cables that you supply. A cable with an
incorrectly attached lug can damage the switch (for example, by causing a short
circuit).
To meet safety and electromagnetic interference (EMI) requirements and to ensure
proper operation, you must connect EX 3200 and EX 4200 switches to earth ground
before you connect them to power. For installations that require a separate grounding
conductor to the chassis, use the protective earthing terminal on the switch chassis
to connect to the earth ground. For instructions on connecting earth ground, see
“Connecting Earth Ground to an EX-series Switch” on page 78.
■ Install the power supply in the chassis. For instructions on installing a power
supply in an EX 3200 or EX 4200 switch, see “Installing a Power Supply in an
EX-series Switch” on page 107.
To connect AC power to an EX 3200 or EX 4200 switch:
1. Attach the electrostatic discharge (ESD) grounding strap to your bare wrist, and
connect the strap to the ESD point on the chassis.
2. Ensure that the power supplies are fully inserted in the chassis and the screws
on their faceplates are tightened.
3. Squeeze the two sides of the power cord retainer clip, and insert the L-shaped
ends of the wire clip into the holes in the bracket on each side of the AC appliance
inlet on the AC power supply faceplate (see Figure 42 on page 81).
4. Locate the power cord or cords shipped with the switch; the cords have plugs
appropriate for your geographical location. See “AC Power, Connection, and
Power Cord Specifications” on page 56.
5. Insert the coupler end of the power cord into the AC appliance inlet on the AC
power supply faceplate.
6. Push the cord into the slot in the adjustment nut of the power cord retainer. Turn
the nut until it is tight against the base of the coupler and the slot in the nut is
turned 90° from the top of the switch (see Figure 43 on page 81).
7. If the AC power source outlet has a power switch, set it to the OFF (0) position.
8. Insert the power cord plug into an AC power source outlet.
9. If the AC power source outlet has a power switch, set it to the ON (|) position.
10.
Verify that the AC OK LED on the power supply is lit and is on steadily.
80 ■ Connecting AC Power to an EX 3200 or EX 4200 Switch
Complete Hardware Guide for EX 3200 and EX 4200 Switches
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