UL 38 UL Standard for Safety Manual Signaling Boxes for Fire Alarm Systems
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UL 38 Document Information:
Title
UL Standard for Safety Manual Signaling Boxes for Fire Alarm Systems
Underwriters Laboratories Inc.
Publication Date:
Jul 3, 2008
Scope:
These requirements cover manual signaling boxes for fire alarm
systems intended for permanent installation and used in ordinary
locations in accordance with the National Electrical Code, NFPA 70,
and the National Fire Alarm Code, NFPA 72.
A manual signaling box is an assembly of a mechanism having
electrical contacts designed to transmit a signal when an integral
part is operated manually. The signaling contacts are intended to
be connected to circuits of fire alarm systems. The types of boxes
covered by these requirements are coded boxes and non-coded boxes,
including signaling boxes, fire and guard's tour reporting
stations, and guard's tour reporting stations for suppressed-signal
tour combinations.
A manual signaling box having a pre-wound signaling mechanism
and equipped with a tripping electromagnet to permit automatic
actuation by separate detectors, and similar combination devices,
shall be evaluated with regard to compliance with the applicable
requirements for both manual signaling boxes and
electrically-actuated transmitters.
A manual signaling box shall be constructed for use with
system-control units, electrically-actuated transmitters, or
similar units that will permit its application in compliance with
applicable codes and standards of the National Fire Protection
Association.
These requirements do not cover electrically-actuated
transmitters.
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