Many switches come with dual power ratings (110 or 220 volt operation).
Therefore planning for power requirements is critical. If a wiring closet
currently only supplies 110 volts it must be determined whether or not to
operate the switch at 110 volts or 220 volts.
You not only need to plan for voltage requirements but amperage
requirements. PoE switches can be double or triple the amperage draw
compared to a non-PoE switch.
These devices may be deeper (longer) than other equipment in your network
due to the added PoE power supplies. Also if RPS units have been added to
the rack or wiring closet, ensure enough space has been planned for all
Space around the switch and around the other units must be available to allow:
PoE switch devices and RPS units may be heavier than other non-PoE switch
devices in your network. Therefore you should rack heavy devices at the
bottom of the rack, followed by lighter devices as you move up the rack. This
will help to keep the rack from tipping over.
Secure racks as specified by your rack's manufacturer. Ensure your racks are
compliant with any earthquake structural rules and regulations.
access by service personnel
space for power cords and other wiring
cool air circulation