National electrical code 1996 this 1996 edition of the national electrical code nfpa 70 1996 was adopted by the national fire protection association inc on may 25 1995 . Effective july 1 1996 all resistance electric heating equipment within the scope of art 427 must have a grounded metal covering bath on heating wire and cables new subsection a and also on heating panels new subsection b in either case the metal covering must provide an effective ground return path. National electrical code 1996 1st edition by national fire protection association author 50 out of 5 stars 3 ratings isbn 13 978 0442022235 isbn 10 0442022239 why is isbn important isbn this bar code number lets you verify that youre getting exactly the right version or edition of a book the 13 digit and 10 digit formats both work. National electrical code 1996 revised every three years the national electrical code nec is the most widely used and accepted criteria for all electrical installations