MTE enclosures are designed to provide a degree of protection for electrical components and prevent incidental personnel contact with the enclosed equipment. Depending on the enclosure selected, these enclosures meet the requirements of NEMA 1/2 or 3R.
An approximate cross reference guide between NEMA, UL, CSA, and IEC enclosure are as follows:
Type 1 NEMA / IEC IP20 Enclosure: Are designed for indoor use and will provide protection against contact with the enclosed equipment.
Type 2 NEMA / IEC IP20 Enclosure: Are designed for indoor use and will provide protection against contact with the enclosed equipment and provide a degree of protection against limited amounts of falling water and dirt.
Type 3R NEMA / IEC IP23 Enclosure: Are designed for outdoor use primarily to provide protection against contact with the enclosed equipment and provide a degree of protection against falling rain sleet and external ice formation.