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Impedance
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The total opposition that a circuit offers to the flow of alternating current or any other vary current at a particular frequency. It is a combination of resistance R and reactance X, measured in ohms. |
| Inductance | The property of a circuit or circuit element that opposes a change in current flow, thus causing current changes to lag behind voltage changes. It is measured in henrys. |
| Insulation | A material having high resistance to the flow of electric current. Often called a dielectric in rado frequency cable. |
| Jacket | An outer non-metallic protective covering applied over an insulated wire or cable. |
| Jumper Cable | A short flat cable inter-connecting two wiring boards or devices. |
| Lay | The length measured along the axis of a wire or cable required for a single strand (in stranded wire) or conductor (in cable) to make one complete turn about the axis of the conductor or cable. |
| Longitudinal Shield | A tape shield, flat or corrugated, applied longitudinally with the axis of the core being shielded. |
| L-N | An abbreviation for line-to-neutral, the location for the most common type of power surge (see Full Protection). |
| MTW | Thermoplastic insulated machine tool wire. |
| Multiconductor | More than one conductor within a single cable complex. |
| Mylar | A synthetic compound with high dielectric qualities made by Du-pont® and used extensively in the wire and cable industry. |
| Noise | A term for unwanted electrical signals on the power line. |
| Noise Filter | An electronic component, usually a capacitor, designed to minimize unwanted electrical signals. |
| Ohm | A unit of electrical resistance. |
| Peak Current | Another term for energy capacity. |
| Picosecond | One trillionth of a second. |
| Plasticizer | A chemical agent added to plastics to make them softer and more pliable. |
| Potting | The sealing of a cable termination or other component with a liquid that thermosets intos an elastomer. |
| Primary Insulation | The first layer of non-conductive material applied over a conductor, whose prime function is to act as electrical insulation. |
| Put-Up | Packaging of finished wire or cable. |
| Rated Voltage | The maximum voltage at which an electrical component can operate for extended periods without undue degradation or safety hazard. |
| Resistance | A measure of the difficulty in moving electrical current through a medium when voltage is applied. It is measure in ohms. |