Hello Again Group, There are several documents available from OSHA's site. Attached is another pdf from OSHA dated 1993 to show more history of OSHA requirements/laws...
This letter defines the term "approved" which is used in several 29CRF documents and also used in the NEC. Again, OSHA confirms "must be approved" and explains "approved" can only be findings from an NRTL. Just another document I located. thanks group for your help Chris
All electrical equipment must be approved.pdf
Description: All electrical equipment must be approved.pdf
