What is a communications enclosure & ancillary system?

An enclosure that houses communications equipment and ancillary systems only, designed such that equipment contained within can be accessed without the need for personnel to enter the cabinet. An enclosure is typically pre-wired and its equipment is pre-installed. Example: (See Figure 3-2 and Figure 3-4.) An unmanned, weather-tight enclosure.

What are emergency backup lighting units?

Emergency backup lighting units shall be installed to activate immediately upon loss of all AC power in all equipment shelters and tenant improvement equipment rooms within a building. Each unit shall be equipped with a self-test button or switch. Each unit shall have a minimum of two lamps. Lamps may be sealed beam or tungsten halogen.

What is a communications equipment system?

Some communications equipment systems include detectors and alarms that transmit to centralized control centers within the system itself. High-rise buildings often utilize a second dedicated facility alarm and can be included as part of a central alarm system connected to the local fire department.

Can AC power distribution be combined with a cable tray system?

When AC power distribution is to be combined with the cable tray system, the AC power raceway shall not be supported by or supported from the cable tray system unless the cable tray system is manufactured and approved for this purpose.

Can a standard rack be installed in a pre-fab building?

A standard rack is intended for indoor installation only in buildings or shelters. Pre-fab buildings shelters, cabinets, and vaults may have equipment fully or partially installed prior to building shipment, requiring additional building specifications to allow lifting with equipment installed.