This new Second edition was issued to clarify the UL effective date statement shown on the Preface page and to make other administrative changes. The technical content of the First edition has been reproduced verbatim in this edition; the text of the standard has not been changed.
As noted in the Commitment for Amendments statement located on the back side of the title page, UL and CSA are committed to updating this IEC-based binational standard jointly. However, this Second edition dated October 8, 2007 will not be issued by CSA since it addresses UL only administrative changes.