In what installations is Type MI cable permitted?

Type MI (Mineral Insulated) cable is a versatile and durable electrical wiring option designed for various applications. The correct answer highlights its permission for use in branch circuits or feeders, both indoors and outdoors, in wet or dry locations.

This flexibility comes from the cable's construction, which involves copper conductors surrounded by magnesium oxide insulation and a metal sheath. The materials granting Type MI cable excellent resistance to moisture, heat, and physical damage make it suitable for challenging environments, including areas where traditional cable types might fail.

Using Type MI cable in both indoor and outdoor settings allows for its application in a range of installations, from commercial buildings to industrial facilities, and its ability to withstand wet conditions expands its usability into areas previously restricted for other types of wiring. This adaptability underlines the importance of adhering to regulations and standards pertaining to the installation of different cable types, confirming Type MI’s broad scope of permissible uses.