| Term | Description |
|---|---|
| Chlorinated Polyethylene (CPE) | A thermoset that combines good LOI and good chemical resistance similar to polyethylene, typically used as jacket material |
| Chlorosulfonated Polyethylene (CSPE) | A rubbery polymer made by treating polyethylene with chlorine and sulfur dioxide. It is suitably compounded and crosslinked for application as jacket or as insulation (manufactured by E.I. DuPont under trade name Hypalon) |
| Circuit | The complete path through which a current flows or part of the complete path, such as one conductor |
| Circuit Sizes | A popular term for building wire sizes 14 through 10 AWG |
| Circular Mil. | The area of a circle one mil. (.001") in diameter; 7.845 x 10-7 sq. in. Used in expressing wire cross sectional area. |
| CL2 | Designation of cable which meets Vertical Tray flame test for Class 2 systems |
| CL2P | Designation of Plenum Cable which meets Steiner Tunnel flame test for Class 2 systems |
| CL2R | Designation of Riser Cable which meets Riser flame test for Class 2 systems |
| CL2X | Designation of cable which meets VW-1flame test for Class 2 systems |
| CL3 | Designation of cable which meets Vertical Tray flame test for Class 3 systems |
| CL3P | Designation of Plenum Cable which meets Steiner Tunnel test for Class 3 systems |
| CL3R | Designation of Riser Cable which meets Riser flame test for Class 3 systems |
| CL3X | Designation of cable which meets VW-1 flame test for Class 3 systems |
| Cladding | A method of applying a layer of metal over another metal wherein the junction of the two metals is continuously welded |
| CM | Designation of cable which meets Vertical Tray flame test for Communication systems |
| CMP | Designation of Plenum cable which meets Steiner tunnel flame test for Communication systems |
| CMR | Designation of Riser cable which meets Riser flame for Communication systems |
| CMX | Designation of cable which meets VW-1 flame test for Communication systems |
| Coat | To cover with a continuous layer of compound (such as varnish) for purposes of finishing, protecting or enclosing. Usually comprises variable degrees of impregnation depending on the nature of the substance. |
| Coating | A material applied to the surface of a conductor to prevent environmental deterioration, facilitate soldering or improve electrical performance |
| Coaxial Cable | A cable consisting of two cylindrical conductors with a common axis, separated by a dielectric |
| Cold flow | Permanent deformation of the insulation due to mechanical force or pressure (not due to heat softening) |
| Cold Test | Any test to determine the performance of cables during or after subjection to a specified low temperature for a specified time |
| Color Code | A system for circuit identification through use of solid colors and contrasting tracers |
| Common Axis Cabling | In multiple constructions, a twisting of all conductors about a "common axis" with two conductor groups selected as pairs. This practice yields smaller diameter constructions than a separate axis construction. |
| Common Mode | (Noise), caused by a difference in "ground potential." By grounding at either end rather than both ends (usually grounded at source) one can reduce this interference. |
| Communications Cable | UL (Underwriter's Laboratories) Standard 444; National Electrical Code (NEC) Article 800 of NFPA 70 |
| Community Antenna Television Cable | UL (Underwriter's Laboratories) Standard 1655; National Electrical Code (NEC) Article 820 of NFPA 70 |
| Compact Stranded Conductor | A unidirectional or conventional concentric conductor manufactured to a specified diameter, approximately 8 to 10% below the nominal diameter of a non-compact conductor of the same cross-sectional area |
| Compatibility | The ability of dissimilar materials to exist in mutual proximity or contact without changing their physical or electrical properties |
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