Mineral insulated (MI) cable was introduced in the early 1950's as an electric powered alternative to steam and liquid heat tracing. MI cable is a constant wattage, series resistance heater in which the entire circuit acts as a continuous heating element.

MI cable is capable of carrying high heating loads. Given the proper conductor and sheath alloys, it can be used in applications up to 800�C. Its high impact resistance and general ruggedness allows it to stand up to rough handling in the field. Circuits usually are factory fabricated to length prior to installation, which can be a source of problems when piping changes are made since installations are difficult to field modify.

The Heat Trace range of Mineral Insulated (MI) heating cables have been developed to meet the specific need for a cable having a high temperature capability and electrical resistance values needed for long circuit lengths.