UL 521:1999 Standard for Heat Detectors for Fire Protective Signaling Systems
- Abbreviation
- UL 521:1999
- Valid from
- 19/02/1999
- Information provider
- IHS Markit,
- Author
- Underwriters Laboratories
- Information type
- Other Standard,
- Format
- HARD COPY,
Description
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.
Scope
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.
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.
This resource is cited by:
UL 521:1999 Standard for Heat Detectors for Fire Protective Signaling Systems
This document is CITED BY:
-
NZS 4512:2010
UL 521:1999 is cited by NZS 4512:2010 Fire detection and alarm systems in buildings -SPONSORED
-
NZS 4512:2021
UL 521:1999 is cited by NZS 4512:2021 Fire detection and alarm systems in buildings -SPONSORED