UL-1778 Complete Document History
Uninterruptible Power Systems

Complete Current Edition:
   5TH EDITION - Standard for Uninterruptible Power Supply Equipment - June 13, 2014
   CHANGE 08/15 - REVISION CHANGE - CODE D - Aug. 7, 2015
   CHANGE 10/10/17 - REVISION CHANGE - CODE D - Oct. 10, 2017
   CHANGE 10/12/17 - REVISION CHANGE - CODE D - Oct. 12, 2017
   CHANGE 04/23 - REVISION CHANGE - CODE D - April 28, 2023

Obsolete Revision Information:
   CHANGE 11/14 - REVISION CHANGE - CODE D - Nov. 19, 2014
   CHANGE 10/11 - REVISION CHANGE - CODE D - Oct. 14, 2011
   CHANGE 02/10 - REVISION CHANGE - CODE D - Feb. 24, 2010
   CHANGE 07/06 - REVISION CHANGE - CODE D - July 28, 2006
   CHANGE 02/06 - REVISION CHANGE - CODE D - Feb. 28, 2006
   CHANGE 01/06 - REVISION CHANGE - CODE D - Jan. 30, 2006
   4TH EDITION - Standard for Uninterruptible Power Supply Equipment - Sept. 15, 2005
   CHANGE 05/04 - REVISION CHANGE - CODE D - May 27, 2004
   3RD EDITION - Standard for Uninterruptible Power Supply Equipment - March 14, 2003
   CHANGE 01/00 - REVISION CHANGE - CODE D - Jan. 5, 2000
   CHANGE 01/99 - REVISION CHANGE - CODE D - Jan. 11, 1999
   CHANGE 11/97 - REVISION CHANGE - CODE D - Nov. 17, 1997
   CHANGE 03/96 - REVISION CHANGE - CODE D - March 15, 1996
   CHANGE 02/96 - REVISION CHANGE - CODE D - Feb. 1, 1996
   2ND EDITION - CONCURRENT W/3RD EDITION - Oct. 25, 1994
   1992 EDITION - Standard for Uninterruptible Power Supply Equipment - Jan. 1, 1992
   1989 DRAFT - 1989 Draft Edition - March 15, 1989
   1989 EDITION - Standard for Uninterruptible Power Supply Equipment - Jan. 1, 1989