Use the links below to view specifications, and to generate a product request. Description of Film Insulatations Description of Fiber Serve Insulations Round Litz-Type 1 Round Litz-Type 2 Round Litz-Type 3 Round Litz-Type 4 Round Litz-Type 5 Round Litz-Type 6 Braided Litz-Type 7 Rect. Litz-Type 8 Rectangular Litz Back to Litz Back to Products Product Request

Litz Cable Design (cont . . .)

4. The type of insulation used for the single end conductors depends on the customer's requirements and the environment in which the cable will be used. Polyurethane and polyurethane-nylon are by far the most widely used film insulations. Polyurethane has the best electrical properties, and therefore provides the highest "Q" factor, as well as being solderable. Polyurethane should be specified for all applications up to 105°C operating temperature where abrasion is not a problem. Polyurethane-nylon is also solderable although its electrical properties are not quite as good. Polyurethane-nylon should be specified for all applications up to 130°C where abrasion might be a problem.
   
   
5. After gauge size, number of wires, and type of insulation is determined, the next step is to decide on cable construction and overall insulation.

   Overall insulation for types 1, 2, 3, 4, 5 and 6 litz constructions are generally servings of nylon, silk, cotton, dacron, high temperature nylon or glass for cable diameters less than one half inch. If the cable diameter is greater than on half inch, mylar and PVC tapes or a combination of the above items under a PVC jacket.

   Nylon is the most widely used served insulation where the temperature does not exceed 155°C. If a greater temperature rating is required, high temperature nylon or glass must be used.

   Some of the more common type 1 constructions are listed in the catalog. However, the outline below can be used to find overall diameter of any construction.

   1. If the total number of strands is less than forty, a type 1 litz construction is normally used. Bunched constructions up to one hundred single end wires can be produced if space is the most important factor. However, these larger constructions may not produce optimum "Q" since buried wires tend to increase skin effect losses in the conductor.
      
      
      1. Conductor diameter of type litz constructions can be computed from the following formula:

2. Overall diameter is then found by adding twice the insulation wall thickness to the strand diameter. For 40/34 nylon, which is the most common insulation used on type 1 constructions, .0025 inches per wrap should be added to the strand diameter.
   
   
2. The more common sizes of types 2, 3, 4, 5, 6, and 7 litz constructions are listed in this catalog. If non-standard constructions are required, consult us for specific information.