The copper-sheathed, mineral insulated heating cables are covered with an extruded high-density polyethylene (HDPE) jacket and are supplied as complete factory-assembled cables ready to connect to a junction box. The series-type technology, inherent to all mineral insulated heating cables, provides a reliable and consistent heat source that is ideal for embedded snow melting applications. The copper sheath provides an ideal ground path and allows for a rugged yet flexible heating cable that is easy to install.
The MI heating unit consists of the heating cable, the hot-cold joint and the cold lead cables with an appropriate seal and gland. The connecting and sealing of an MI heating unit is critical for safe and reliable operation, please refer to the following pages for standard construction types. The insulation of the inner heating conductor is embedded in magnesium oxide, a non-aging and non-combustible material. A wide range of resistances ensures the termination of a multitude of heating cable lengths with various outputs and nominal voltages. We offer both single core and dual core resistance wires as well as a seamless outer jacket made from Copper + HDPE.
WARNING — A ground fault protection device is required by NEC to minimize the danger of fire if the heating cable is damaged or improperly installed. A minimum trip level of 30 mA is recommended to minimize nuisance tripping.
Features of CMI Cable
|
Max. Exposure Temp. (°F) |
194 |
Max. W/Ft. |
24 |
Max. Circuit Length (Ft.) |
846 |
Voltages |
Up to 600 |
Hazardous Ratings |
No |
Usable on Plastic Pipe |
No |
Cut-to-Length in Field |
No |
Field Splicable |
No |
Can be Overlapped |
No |
Output Varies with Temp. |
No |
Varies Output Along Length |
No |
MI Corrosion Selection Guide
|
Moisture |
Yes |
Aqueous Solutions of Inorganic Compounds |
No |
Liquids Organic Chemicals Acids or Bases |
Yes |
Acids or Bases |
No |
This is a recommendation guide. Chromalox cannot warrant any Electric Heat Trace against failure by sheath degradation if such failure
is the result of operating conditions beyond the control of the heater manufacturer. It is the responsibility of the purchaser to make the
ultimate choice of sheath material based on knowledge of the chemical composition of the corrosive solution, character of materials
entering the solution, and controls which maintains the process.