UL-497B › Standard for Protectors for Data Communications and Fire-Alarm Circuits
Included in this current edition are the following subparts:
4TH EDITION - June 14, 2004
CHANGE 10/08 - Oct. 15, 2008
CHANGE 12/12 - Dec. 17, 2012
CHANGE 02/17 - Feb. 10, 2017
CHANGE 02/22 - Feb. 7, 2022
CHANGE 10/08 - Oct. 15, 2008
CHANGE 12/12 - Dec. 17, 2012
CHANGE 02/17 - Feb. 10, 2017
CHANGE 02/22 - Feb. 7, 2022
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Document Number
UL-497B
Revision Level
4TH EDITION
Status
Current
Publication Date
June 14, 2004
Page Count
26 pages