UL-506 › Complete Document History
Standard for Specialty Transformers
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14TH EDITION - Standard for Specialty Transformers - June 2, 2017
CHANGE 11/17 - REVISION CHANGE - CODE B - Nov. 29, 2017
CHANGE 01/22 - REVISION CHANGE - CODE B - Jan. 28, 2022
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Obsolete Revision Information: |
CHANGE 10/13 - REVISION CHANGE - CODE B - Oct. 3, 2013
CHANGE 10/12 - REVISION CHANGE - CODE B - Oct. 12, 2012
CHANGE 03/10 - REVISION CHANGE - CODE B - March 25, 2010
CHANGE 12/09 - REVISION CHANGE - CODE B - Dec. 4, 2009
13TH EDITION - SPECIALTY TRANSFORMERS - June 16, 2008
CHANGE 05/06 - REVISION CHANGE - CODE A - May 11, 2006
CHANGE 09/05 - REVISION CHANGE - CODE A - Sept. 30, 2005
CHANGE 2/04 - REVISION CHANGE - CODE A - Feb. 5, 2004
12TH EDITION - SPECIALTY TRANSFORMERS - May 15, 2000
11TH EDITION - SPECIALTY TRANSFORMERS - July 28, 1994
CHANGE 09/93 - SPECIALTY TRANSFORMERS - Sept. 7, 1993
1989 EDITION - SPECIALTY TRANSFORMERS - Jan. 1, 1989
1988 CHANGES - SPECIALTY TRANSFORMERS - Feb. 4, 1988
ERRATA SHEET - SPECIALTY TRANSFORMERS - June 26, 1987
1987 CHANGES - SPECIALTY TRANSFORMERS - March 27, 1987
1979 EDITION - SPECIALTY TRANSFORMERS - Dec. 26, 1979
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