1.1 These requirements cover electrically operated equipment marked "Double Insulation" or "Double Insulated" to be used in accordance with the National Electrical Code, NFPA 70. 1.2 Equipment marked "Double Insulation" or "Double Insulated" shall comply with the applicable requirements in this standard and the standard covering the particular type of equipment - the end-product standard. In cases where the end-product standard contains requirements for double insulation, that standard takes precedence.
UL 1097-2004 history
2021UL 1097-2021 UL Standard for Safety Double Insulation Systems for Use in Electrical Equipment (Sixth Edition; Reprint with revisions through and including April 26@ 2016)
2012UL 1097-2012 UL Standard for Safety Double Insulation Systems for Use in Electrical Equipment (Sixth Edition; Reprint with revisions through and including April 26@ 2016)
2011UL 1097 BULLETIN-2011 UL Standard for Safety Double Insulation Systems for Use in Electrical Equipment (COMMENTS DUE: January 16@ 2012)
2004UL 1097-2004 UL Standard for Safety Double Insulation Systems for Use in Electrical Equipment Fifth Edition
1997UL 1097-1997 Double insulation systems for use in electrical equipment
1993UL 1097-1993 Double insulation systems for use in electrical equipment