UL Subject 1563
Standard for Electric Spas, Equipment Assemblies, and Associated Equipment (Bulletin, 1/9/2004)
standard by Underwriters Laboratories, 01/09/2004
UL Subject 1248
Standard for Engine-Generator Assemblies for Use in Recreational Vehicles (Bulletin, 12/19/2003)
standard by Underwriters Laboratories, 12/19/2003
UL Subject 60335-1
Standard for Safety of Household and Similar Electrical Appliances, Part 1: General Requirements (Bulletin, 12/19/2003)
standard by Underwriters Laboratories, 12/19/2003