UL 521 BULLETIN

UL Standard for Safety Heat Detectors for Fire Protective Signaling Systems

contributor author	UL - UL
date accessioned	2017-09-04T18:29:35Z
date available	2017-09-04T18:29:35Z
date copyright	07/07/2010
date issued	2010
identifier other	ITXNTCAAAAAAAAAA.pdf
identifier uri	https://yse.yabesh.ir/std/handle/yse/211813
description abstract	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. Deleted October 3, 2002
language	English
title	UL 521 BULLETIN	num
title	UL Standard for Safety Heat Detectors for Fire Protective Signaling Systems	en
type	standard
page	2
status	Active
tree	UL - UL:;2010
contenttype	fulltext