UL 1778 PROPOSED-2002
(DRAFT) UL Standard for Safety Uninterruptible Power Supply Equipment Proposed Third Edition; Comments Due by January 24, 2003

Standard No.

UL 1778 PROPOSED-2002

Release Date

2002

Published By

Underwriters Laboratories (UL)

Status

Be replaced 2005-09

Replace By

UL 1778-2003

Latest

UL 1778 BULLETIN-2017

Scope

1.1 Scope Replace this clause of the RD with the following: 1.1.1 Equipment covered by this standard This Standard applies to UNINTERRUPTIBLE POWER SYSTEMS (UPS). The primary function of the UPS for this Standard is to ensure continuity of an alternating power source. The UNINTERRUPTIBLE POWER SYSTEM may also serve to improve the quality of the power source by keeping it within specified characteristics. This Standard is applicable to movable, stationary, fixed, and built-in UPS for distribution systems up to 600 V a.c. This equipment is designed to be installed in accordance with the Canadian Electrical Code, Part I, CSA C22.1, or the National Electrical Code, ANSI/NFPA 70, and, unless otherwise identified, the Standard for the Protection of Electronic Computer Data-Processing Equipment, ANSI/NFPA 75. This Standard specifies requirements intended to ensure safety for the OPERATOR and, where specifically stated, for SERVICE PERSONNEL. This Standard is intended to reduce the risk of fire, electric shock, or injury to persons from installed equipment, both as a single unit or as a system of interconnected units, subject to installing, operating, and maintaining the equipment in the manner prescribed by the manufacturer. 1.1.2 Additional requirements: In addition to the requirements in this Standard, a UPS is to

UL 1778 PROPOSED-2002 history

• 2017 UL 1778 BULLETIN-2017 UL Standard for Safety Uninterruptible Power Systems (COMMENTS DUE: SEPTEMBER 11@ 2017)
• 2017 UL 1778-2017 UL Standard for Safety Uninterruptible Power Systems (Fifth Edition; Reprint with revisions through and including October 12@ 2017)
• 2016 UL 1778 BULLETIN-2016 UL Standard for Safety Uninterruptible Power Systems (COMMENTS DUE: JANUARY 9@ 2017)
• 2014 UL 1778 BULLETIN-2014 UL Standard for Safety Uninterruptible Power Systems (COMMENTS DUE: April 07@ 2014)
• 2014 UL 1778-2014 UL Standard for Safety Uninterruptible Power Systems (Fifth Edition; Reprint with revisions through and including August 7, 2015)
• 2009 UL 1778 BULLETIN-2009 UL Standard for Safety Uninterruptible Power Systems (COMMENTS DUE: December 18@ 2009)
• 2008 UL 1778 BULLETIN-2008 UL Standard for Safety Uninterruptible Power Systems COMMENTS DUE: APRIL 11, 2008
• 2006 UL 1778 CRD-2006 UL Standard for Safety Uninterruptible Power Systems - Section / Paragraph Reference: N/A (Edition 4: September 15@ 2005)
• 2005 UL 1778 BULLETIN-2005 UL Standard for Safety Uninterruptible Power Systems
• 2005 UL 1778-2005 Uninterruptible power systems
• 2004 UL 1778 BULLETINS-2004 04/13/2004 (20p)
• 2003 UL 1778-2003 UL Standard for Safety Uninterruptible Power Systems (Third Edition)
• 2002 UL 1778 PROPOSED-2002 (DRAFT) UL Standard for Safety Uninterruptible Power Supply Equipment Proposed Third Edition; Comments Due by January 24, 2003
• 2002 UL 1778 BULLETIN-2002 UL Standard for Safety Uninterruptible Power Systems
• 2000 UL 1778 BULLETINS-2000 UL Standard for Safety Uninterruptible Power Systems (09/25/2000 (56p); 07/05/2000 (4p))
• 1994 UL 1778-1994 Uninterruptible power supply equipment