UL-1638A › Standard for Visual Signal Appliances for General Signaling Use
UL-1638A
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1ST EDITION
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CURRENT
Included in this current edition are the following subparts:
1ST EDITION - June 22, 2016
REVISION 09/21 - Sept. 21, 2021
REVISION 09/21 - Sept. 21, 2021
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This document is available in Paper format.
Document Number
UL-1638A
Revision Level
1ST EDITION
Status
Current
Publication Date
June 22, 2016