UL-1917 Complete Document History
Standard for Solid-State Fan Speed Controls

Complete Current Edition:
   5TH EDITION - Standard for Solid-State Fan Speed Controls - June 17, 2022

Obsolete Revision Information:
   CHANGE 10/17 - REVISION CHANGE - CODE B - Oct. 4, 2017
   4TH EDITION - Standard for Solid-State Fan Speed Controls - July 3, 2013
   CHANGE 02/12 - REVISION CHANGE - CODE B - Feb. 23, 2012
   CHANGE 08/11 - REVISION CHANGE - CODE B - Aug. 16, 2011
   CHANGE 12/09 - REVISION CHANGE - CODE B - Dec. 17, 2009
   CHANGE 04/07 - REVISION CHANGE - CODE C - March 23, 2007
   CHANGE 02/07 - REVISION CHANGE - CODE B - Feb. 5, 2007
   3RD EDITION - SOLID-STATE FAN SPEED CONTROLS - Feb. 28, 2003
   2ND EDITION - SOLID-STATE FAN SPEED CONTROLS - Feb. 11, 1994
   1989 EDITION - SOLID-STATE FAN SPEED CONTROLS - Dec. 22, 1989