Tempco-Pak Cable Heater Specifications and Tolerances

Watt Density: 75 watts per square inch of sheath surface area maximum with factory approval

Maximum temperature:

  • 1500°F (815°C) for 304 stainless steel sheath
  • 1800°F (982°C) for Inconel® 600 sheath

Electrical Ratings

Resistance: ±10% unless otherwise specified

Voltage: 120V and 240V standard

Thermocouples:

  • ANSI Type J to 1500°F (815°C)
  • Type K to 1800°F (982°C)
  • Note:All thermocouples and their junctions are internal to the heater sheath. A grounded junction at the heater tip is standard. An ungrounded junction anywhere along the heater’s length is optional. Available in sheath diameters .125″ and larger.

Dimensional Limitations

Heater cable diameters:

  • 0.040″
  • 0.062″
  • 0.115″
  • 0.120″
  • 0.125″
  • 0.132″
  • 0.153″
  • 0.163″
  • 0.174″
  • 0.188″
  • 0.220″
  • 0.250″
  • Others available upon request.

Cable diameter tolerance: ±.005

Heater length tolerance:

  • 0 to 6″ (+1/8″, –0)
  • 6 to 18″ (+1/4″, –0)
  • 18 to 24″ (+3/8″, –0)
  • 24 to 120″ (+3/4″, –0)
  • 120 to 300″ (±1″)

Transition & Termination Construction

Transition (potting) adapters:

  • 5/16″ O.D. × 1-1/2″ long for heater cable 0.163″ diameter and smaller.
  • 1/2″ O.D. × 1-1/2″ long for heater cable diameters above 0.163″

Transition Temperature Rating:

  • Standard transition is rated to 482°F (250°C).
  • Optional High Temperature Transition is rated to 842°F (450°C).
  • Standard heater lead wire insulation is TGGT (Teflon®, double fiberglass, Teflon® impregnation), which is rated to 482°F (250°C).
  • Optional high temperature insulation is MGT (mica, fiberglass, Teflon® impregnation) which is rated to 842°F (450°C).

Thermocouple:

  • Standard leads use a fiberglass insulation rated to 900°F (482°C).
  • Teflon® insulation is available upon request.

Optional lead protection: Stainless steel overbraid or galvanized armor cable.