This new edition of ANSI/UL 60950-22 is being issued to update requirements to those published in IEC 60950-22, second edition. Technical changes to the IEC Standard have been incorporated into the new edition of the UL Standard. National Differences from the First Edition of UL 60950-22 were reviewed and updated in the new edition.

UL 60950-22 is an adoption of IEC 60950-22, Information Technology Equipment – Safety – Part 22: Equipment to be Installed Outdoors (Second Edition, issued January 2016). Please note that the National Difference document incorporates all of the U.S. national differences for UL 60950-22.