Connecting AC Power to an EX3200 or EX4200 Switch
The power supply in an EX3200 or EX4200 switch is a hot-removable and hot-insertable field-replaceable unit (FRU) located on the rear panel: You can remove and replace it without powering off the switch or disrupting switch functions.
Before you begin connecting AC power to an EX3200 or EX4200 switch:
- 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 EX3200 and EX4200 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. An EX3200 or EX4200 switch gets additional grounding when you plug the power supply in the switch into a grounded AC power outlet by using the AC power cord appropriate for your geographical location (see AC Power Cord Specifications for EX3200 and EX4200 Switches).
- Install the power supply in the chassis. For instructions on installing a power supply in an EX3200 or EX4200 switch, see Installing a Power Supply in an EX3200 or EX4200 Switch.
 | Note: Each power supply must be connected to a dedicated power source outlet. |
Ensure that you have the following parts and tools available:
- A power cord appropriate for your geographical location
To connect AC power to an EX3200 or EX4200 switch:
- Ensure that the power supplies are fully inserted in the chassis and the screws on their faceplates are tightened.
- 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 power cord inlet on the AC power supply faceplate (see Figure 1).
- Locate the power cord or cords shipped with the
switch; the cords have plugs appropriate for your geographical location.
See AC Power Cord Specifications for EX3200 and EX4200 Switches.
Warning: Ensure that the power cord does not block access to switch components or drape where people can trip on it.
- Insert the coupler end of the power cord into the AC power cord inlet on the AC power supply faceplate.
- 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 2).
- If the AC power source outlet has a power switch, set it to the OFF (0) position.
- Insert the power cord plug into an AC power source outlet.
- If the AC power source outlet has a power switch, set it to the ON (|) position.
- Verify that the AC OK LED on the power supply is lit and is on steadily.
Figure 1: Connecting the AC Power Cord Retainer Clip to an AC Power Supply in an EX3200 or EX4200 Switch
Figure 2: Connecting an AC Power Cord to an AC Power Supply in an EX3200 or EX4200 Switch
