This section outlines the specifications and guidelines for mineral-insulated, metal-sheathed cable (Type MI). It details the permitted and prohibited uses of Type MI cable, including its application in various environments such as dry, wet, and hazardous locations.

Feb 28, 2021 · 332.6 ARTICLE 332 — MINERAL-INSULATED, METAL-SHEATHED CABLE: TYPE MI compressed refractory mineral insulation and enclosed in a liquidtight and gastight continuous copper or alloy steel sheath.

Mineral insulated cable was designed with critical and essential circuit protection in mind, and is ideal for protection in buildings such as high-rises, subways, tunnels, airports, healthcare facilities and industrial and petrochemical plants.

Dec 29, 2024 · NEC Article 332 provides comprehensive guidelines for the safe and effective use of Mineral-Insulated, Metal-Sheathed Cable (Type MI). Its unique construction and fire-resistant properties make it indispensable for critical electrical installations.

The NEC contains 12 articles (320 through 340) covering types of cables: Armored Cable: Type MC, Flat Cable Assemblies: Type FC, Flat Conductor Cable: Type FCC, Integrated Gas Spacer Cable: Type IGS, Metal Clad Cable: Type MC, Mineral-Insulated Metal-Sheathed Cable: Type MI, Non-metallic Sheathed Cable: Types NM and NMC, Instrumentation Tray ...

Mar 17, 2025 · The NEC contains 12 articles (320 through 340) covering types of cables.

Aug 7, 2015 · 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.

Apr 10, 2020 · If you're going to size MI cable for fire pumps, don't you have to size it based on the 75 degree column as per 110.14 (C) - so how do you get this ampacity if it's not listed in the chart?

Our copper cable sheath is designed to meet all National Electric Code (NEC) grounding requirements, making it a reliable choice for your electrical applications. With a pressure test rating of 2000 psi, you can trust that our MI cable will …

nVent PYROTENAX System 1850 Bare Fire Rated Cable is a range of mineral insulated (MI) 2-hour fire-rated wiring cable for critical and essential circuit protection. It consists of solid copper conductors in a continuous copper sheath (System 1850) and is allowed to be used under virtually any application conditions by both the NEC and CEC.