ULSE - UL 521
Heat Detectors for Fire Protective Signaling Systems
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| Organization: | ULSE |
| Publication Date: | 19 February 1999 |
| Status: | active |
scope:
1.1 These requirements cover heat detectors for fire protective signaling systems intended to be installed in ordinary indoor and outdoor locations in accordance with the Standard for Automatic Fire Detectors, NFPA 72E.
1.2 Heat detectors covered by these requirements employ either normally open contacts or normally closed contacts, provide an electronic signal, or consist of a heat-sensitive cable. The requirements do not cover heat detectors for journal-alarm or unit-alarm devices.
1.3 Deleted
Document History
UL 521
February 19, 1999
Heat Detectors for Fire Protective Signaling Systems
1.1 These requirements cover heat detectors for fire protective signaling systems intended to be installed in ordinary indoor and outdoor locations in accordance with the Standard for Automatic Fire...