Insulation is applied to each wire individually, and then again combined as a duplex pair. The insulation may be extruded, taped, wrapped, served, braided, or applied using other means depending on insulation material and desired characteristics. The insulation isolates each wire from the other electrically and may also serve to identify the calibration type and identify the polarity of each wire. Some types of high temperature insulation cannot accept color coding, and tracer materials are added to the wire braid for identification. Selection of insulation type is dependent on the determining factors of: the end application, the maximum usage temperature, and the atmosphere. Other factors when choosing insulation material are flexibility, abrasion, and electromagnetic interference. In addition to the outer insulation, other layers may be added like foils or stainless-steel exterior braiding to provide electrical shielding or abrasion resistance. Cleveland Electric Laboratories maintains a large inventory of many stock wire configurations. Custom combinations are available upon request.
Thermocouple and Extension wire assemblies are available in long, continuous lengths and are custom built to specification. Cold end termination options include stripped, bare ends, industry-standard plugs/jacks, or custom options.