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Please use this identifier to cite or link to this item: http://hdl.handle.net/1842/5646

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48427_Underwriters' Laboratories_OCR.pdfRequirements1.94 MBAdobe PDFView/Open
Title: Fire-Detection Thermostats
Authors: Anonymous
Issue Date: 19-Jun-1970
Publisher: Underwriters' Laboratories
Series/Report no.: UL
521
Abstract: These requirements cover fire-detection thermostats to be employed in ordinary indoor locations in accordance with the following Standards of the National Fire Protection Association: NFPA No. 71 Central Station Protective Signaling Systems, NFPA No. 72A Local Protective Signaling Systems, NFPA No. 72B Auxiliary Protective Signaling Systems, NFPA No. 72C Remote Station Protective Signaling Systems, NFPA No. 72D Proprietary Protective Signaling Systems, NFPA No. 74 Household Fire Warning Systems. The thermostats covered by these requirements employ either normally open contacts or normally closed contacts. The requirements do not cover thermostats for journal-alarm nor unit-alarm devices.
Description: ERAF: 48427
Keywords: fire
detection
thermostats
standards
URI: http://hdl.handle.net/1842/5646
Appears in Collections:Digital Preservation of the FRS/BRE Fire Research Archives

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