UL-1638A Standard for Visual Signal Appliances for General Signaling Use

UL-1638A - 1ST EDITION - CURRENT


Included in this current edition are the following subparts:

 1ST EDITION - June 22, 2016
 REVISION 09/21 - Sept. 21, 2021


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Document Number

UL-1638A

Revision Level

1ST EDITION

Status

Current

Publication Date

June 22, 2016