UL Subject 6A
Standard for Electrical Rigid Metal Conduit - Aluminum, Bronze, and Stainless Steel (Bulletin, 6/17/2003)
standard by Underwriters Laboratories, 06/17/2003
UL Subject 1638
Standard for Visual Signaling Appliances - Private-Mode Emergency and General Utility Signaling (Bulletin, 6/12/2003)
standard by Underwriters Laboratories, 06/12/2003
UL Subject 1020
Standard for Thermal Cutoffs for Use in Electrical Appliances and Components (Bulletin, 5/30/2003)
standard by Underwriters Laboratories, 05/30/2003