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Telecommunications Closets and Rooms - Size Requirements
Size requirements are based on distributing telecommunications service to one
individual work area per 100 ft² (10 m²) of usable floor space. Minimum
telecommunications closet sizes are shown in the following table:
If the Serving Area is ....
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Then the Closet Must be at Least ...
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 | 1,000 ft² |
| 100 m² |
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| Wall cabinets, Self-contained cabinets or Enclosed Cabinets |
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| Greater than 1,000 ft² and less than 5,000 ft² |
| 100 m² to 500 m² |
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| Shallow Closet at least 2 ft deep x 8.5 ft wide (60 cm x 2.6m) |
| Walk-in Closet at least 4.5 ft by 4.5 ft (1.3 m by 1.3 m) |
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| 5,000 ft² |
| 500 m² |
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| 10 ft x 8 ft |
| (3.0 m x 2.2 m) |
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| Greater than 5,000 ft² and less than 8,000 ft² |
| 500 m² to 800 m² |
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| 10 ft x 10 ft |
| 3.0 m x 2.8 m |
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| Greater than 8,000 ft² and less than 10,000 ft² |
| 800 m² to 1,000 m² |
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| 10 ft x 12 ft |
| 3.0 m x 3.4 m |
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Notes
| Shallow Closets must be at least 2 ft deep x 8.5 ft wide (60 cm x 2.6m).
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| Walk-in Closet must be at least 4.5 ft by 4.5 ft (1.3 m by 1.3 m).
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| Installation of active equipment in shallow or walk-in closets is not recommended
because many types of equipment require environmental control, and a depth of at least 30
in (75 cm).
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| All utility cabinets must be listed and marked in accordance with applicable
electrical codes.
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Use Restriction
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Telecommunications equipment rooms or Telecommunication Riser Closets
should not be used as a passageway to other equipment rooms, nor should they
share space with fire reporting equipment, alarm systems, electrical panel boards,
power transformers, custodial equipment or any other function which would
require access for reasons other than telecommunications maintenance.
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Location
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Telecommunications wiring closets should be centrally located (both
vertically and horizontally) within the building area served. Although
BICSI standards recommend a separate wiring closet for each floor level,
every attempt should be made to maximize the area served from the primary
wiring closet in order to minimize the cost of telecommunications wiring
infrastructure equipment and space.
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Telecommunications wiring closets should be accessible from a common
hallway.
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The maximum wiring run from the telecommunications wiring closets to the
most distant data outlet served from the closet can not exceed 290
feet. The preferred maximum distance is 250 feet. The wiring
closet will be the origination point for wiring to all communications
outlets within the area served.
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Where wiring closets serve areas on more than one floor, the design
process should recognize the need to incorporate appropriate paths of travel
for the raceway systems which will be required to carry the
telecommunications wiring between the floors.
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