UL 1641-2020 pdf free download.STANDARD FOR SAFETY Installation and Classification of Residential Burglar Alarm Systems.
14 Floor Mats
14.1 A floor mat shall be located under a carpet or rug, or otherwise concealed, and shall comply with the Standard for Connectors and Switches for Use with Burglar-Alam, Systems, UL 634.
14.2 A floor mat used in place of a contact for partial protection of an opening shall be as wide as the opening(s) and extend 30 inches (762 mm) from the opening.
14.3 A floor mat used in conjunction with a contact to provide complete protection of an opening shall extend 30 inches (762 mm) to each side of the opening or to a vertical barrier (such as a wall, partition, or the like), and 36 inches (914 mm) from the front or the back of the opening.
15 Intrusion Detection Devices
15.1 General
15.1.1 Intrusion detection devices used in combination with contacts to provide expanded or basic protection shall comply with the Standard for Intrusion-Detection Units, UL 639.
15.1.2 An intrusion detection device shall be installed so that it will not be influenced by movement or other interference outside the protected area.
15.2 Photoelectric units
15.2.1 A photoelectr,c unit used in conjunction with contacts for complete protection of an opening shall be installed so that the beam:
a) Spans the opening at not less than 18 inches (457 mm) nor more than 48 inches (1219 mm) above the floor; and
b) Is located horizontally not more than 24 inches (610 mm) from the opening.
15.3 Motion detection units
15.3.1 A motion detection unit shall respond, within four steps, to a person walking through the covered area at the rate of one 24-inch (610-mm) step per second.
15.4 Sound and vibration units
15.4.1 If a sound or vibration unit is used to protect an opening, the opening, if movable, shall also be
protected by a contact.
16 Shunts
16.1 Contacts or intrusion detection devices may be shunted by an on/off switch to permit portions of the alarm to be deactivated while the occupant is at home to allow freedom of movement.
16.2 To permit exit or entry when the system has been activated, the alarm protection may be temporarily shunted by means of a key- or code-operated device or a timer.
I 16.3 The removal of a key- or code-operated shunted device located outside of the protected area shall initiate an alarm.UL 1641 pdf download.