If a dedicated circuit has been installed, the electrical receptacles found in the computer room should be coded in such a way that they can be identified as part of that dedicated circuit. Usually they are orange in color, or will have a green dot beside each plug signifying an isolated ground (return).
The number of required wall receptacles depends on the amount of computer equipment located near or with the computer. Each device in the same room as the computer will use one plug. An example of devices would be:
1. Computer
2. Monitor
3. Uninterruptible Power Supply (U.P.S. – Battery Backup)
5. External data backup devices (disk drives or tape drives)
4. Any extra devices ¾ i.e. more modems (DSL/Cable), routers, hubs / switches, etc.
In the example above there would be one receptacle needed for the UPS with at least four receptacles being required on the UPS. Also remember that any extra computer terminal or printer will also require an electrical outlet in the location of each individual device elsewhere in the building.
Rental counter stations must have enough electrical outlets provided for all the devices placed in those locations. These items could include the computer, video monitor, receipt printer, contract printer(s), and some type of cash drawer. Card swipe readers, ID Scanners, and Barcode scanners usually do not require an electrical outlet.
