UL 1481-1999
UL Standard for Safety Power Supplies for Fire-Protective Signaling Systems (Fourth Edition)

Standard No.

UL 1481-1999

Release Date

1999

Published By

Underwriters Laboratories (UL)

Status

Be replaced

Replace By

UL 1481-2006

Latest

UL 1481 BULLETIN-2017

Scope

These requirements cover commercial stationary and fixed power supplies for fire-protective signaling systems@ having input and output ratings of not more than 300 volts@ direct- and altemating-current@ (DC and AC)@ for use in indoor locations in accordance with the following Standards of the National Fire Protection Association:NFPA 70 National Electrical Code.NFPA 72 National Fire Alarm Code.These requirements also cover power supply-battery charger combinations used as power supplies@ and battery charger units for use as components in fire-protective signaling systems.These requirements do not cover power supplies or battery chargers integral with control units or amplifiers intended for fire-protective signaling service.These requirements do not cover power supplies for use in hazardous locations@ as defined in the National Electrical Code@ ANSI/NFPA 70.These requirements do not cover commercial power supplies covered by the Standard for Power Units Other Than Class 2@ UL 1012@ or commercial battery chargers covered by the Standard for Battery Chargers for Charging Engine-Starter Batteries@ UL 1236.A power supply that is not a complete assembly and depends upon installation in an end product for compliance with the requirements of this standard shall be investigated under the requirements of the standard for that end product.The term "product" as used in this standard refers to all power supplies@ battery chargers@ power supply-battery charger combinations@ and battery charger units or any part thereof covered by this standard unless specifically noted otherwise.A product that contains features@ characteristics@ components@ materials@ or systems new or different from those covered by the requirements in this Standard@ and that involves a risk of fire@ electric shock@ or injury to persons shall be evaluated using the appropriate additional component and end-product requirements to determine that the level of safety as originally anticipated by the intent of this Standard is maintained. A product whose features@ characteristics@ components@ materials@ or systems conflict with specific requirements or provisions of this Standard shall not be judged to comply with this Standard. Where appropriate@ revision of requirements shall be proposed and adopted in conformance with the methods employed for development@ revision@ and implementation of this Standard.

UL 1481-1999 history

• 2017 UL 1481 BULLETIN-2017 UL Standard for Safety Power Supplies for Fire-Protective Signaling Systems
• 2008 UL 1481 BULLETIN-2008 UL Standard for Safety Power Supplies for Fire-Protective Signaling Systems
• 2006 UL 1481-2006 UL Standard for Safety Power Supplies for Fire-Protective Signaling Systems (Fifth Edition)
• 1999 UL 1481-1999 UL Standard for Safety Power Supplies for Fire-Protective Signaling Systems (Fourth Edition)
• 1994 UL 1481-1994 UL Standard for Safety Power Supplies for Fire Protective Signaling Systems (Third Edition; Reprint with Revisions Through and Including March 08@ 1996)