2010UL 1693-2010 UL Standard for Safety Electric Radiant Heating Panels and Heating Panel Sets (Third Edition)
2002UL 1693-2002 UL Standard for Safety Electric Radiant Heating Panels and Heating Panel Sets (Second Edition)
1995UL 1693-1995 UL Standard for Safety Electric Radiant Heating Panels and Heating Panel Sets (First Edition; Reprint with Revisions Through and Including December 03@ 1997)