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Computer Workstation Arrangements
The most common application of power strips (with or without AC surge protection) is in conjunction with computer workstations. Workstations containing power supply receptacles built into the furniture system generally present no problems to the user. The furniture system power junction point is typically hard-wired back to the power source and does not represent a Code violation.

Workstations supplied from individual outlets that are not a part of a prewired furniture system do present a problem to users. Often a power strip is connected to a single outlet, which in turn accepts all plug connections for workstation loads (CRT, processor and printer).

Code Violation Basis
Theoretically, there is no limit to the number of receptacles that may be connected to an electrical circuit via an arrangement that utilizes power strips. If a single power strip cannot accept all required equipment plugs, a second power strip can simply be plugged into the first. Such a daisy chain arrangement of power strip connections could continue forever. Since the Code limits 120V circuits to 10 duplex outlets per circuit (maximum), the potential for violations is obvious. Every time a user plugs a power strip into existing receptacles he is increasing the number of receptacles on the circuit.

Power Directors
In order to alleviate the problems with non-furniture system workstation outlet limitations, a number of manufacturers have developed Power Director Units to supply workstation loads. One power director unit would supply one workstation. The units are usually located on the table top, below the monitor. Approximately the size of a VCR (depending upon the manufacturer), the units may contain surge suppression, receptacles for peripheral power plugs, and possibly jacks for modems and facsimile machines. The receptacles are usually protected by a main circuit breaker within the director.

Application
The Advisory Board has accepted the use of power directors in the following configuration:

Since existing workstations that utilize power strips represent a Code violation, retrofit of these installations are required. There is no code clause that would allow existing users of power strips to continue with this practice.