The National Electrical Manufacturers Association (NEMA) also publishes three consensus standards that apply to the proper manufacture and installation of cable trays: ANSI/NEMA-VE 1-1998, Metal Cable Tray Systems; NEMA-VE 2-1996, Metal Cable Tray Installation. The National Electrical Manufacturers Association (NEMA) also publishes three consensus standards that apply to the proper manufacture and installation of cable trays: ANSI/NEMA-VE 1-1998, Metal Cable Tray Systems; NEMA-VE 2-1996, Metal Cable Tray Installation. Type MC or TC cable was permitted in ladder, ventilated trough, or ventilated channel in a single layer with a space not less than the largest cable diameter between them. The 1996 NEC included a number of changes in these sections. In Class I, Division 1 locations Type MC Cable listed for use in. in the operation environment. Type. Abstract – This paper explores the various standards and requirements for the certification, selection, use, and installation of cables and cable glands used in explosive gas atmospheres throughout the world. Not only do we sell these cables, we also understand the application of them. Derived from the word 'ATmosphere EXplosibles' and is a mandatory.