UL 1097 PDF
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UL Standard for Safety Double Insulation Systems for Use in Electrical Equipment – Sixth Edition; Reprint with revisions through and including March 24, 2026
1 Scope
1.1 These requirements cover electrically operated equipment marked “Double Insulation” or “Double Insulated” to be used in accordance with the National Electrical Code, ANSI/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.
Summary of Topics
This revision of ANSI/UL 1097 dated December 16, 2021 is being issued to update the title page to reflect the most recent designation as a Reaffirmed American National Standard (ANS). No technical changes have been made.
| Edition | 6 |
|---|---|
| Published Date | February 01, 2012 |
| Last Revision | March 24, 2026 |
| Language | English |









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