Mineral-Insulated, Metal-Sheathed (Type MI) Cable
https://www.testandmeasurementtips.com/mineral-insulated-metal-sheathed-type-mi-cable-where-to-use-it-and-where-not-to-use-it/
Mineral-insulated, metal-sheathed (Type MI) cable is an ultra-reliable, extremely robust wire. It is suitable for the most demanding applications that include instrumentation and power in hazardous locations, outdoor use for services, feeders and branch circuits, nuclear reactors, and extremely high ambient temperatures.
DA: 16 PA: 91 MOZ Rank: 80