| Term | Description |
|---|---|
| Transfer Impedance | The ratio of internal longitude in a voltage to external current flow on the cable shield. It's used to determine shield effectiveness against both the ingress & egress of interfering signals. |
| Transmission Line | A signal-carrying circuit controlled electrical characteristics used to transmit high-frequency or narrow-pulse signals |
| Transmission Loss | The decrease or loss in power during transmission of energy from one point to another. Usually expressed in decibels. |
| Tray | A unit/assembly of units or sections (and associated fittings) made of non-combustible materials forming a rigid structural system used to support cables |
| Tray Cable | A factory-assembled multi-conductor/multi-pair control signal or power cable; specifically approved under the National Electrical Code for installation in trays |
| Tray Cables | CSA (Canadian Standards Association International) Standard C22.2 No. 230-M1988; Canadian Electrical Code, Part I |
| Tri-Shield | A type of shielding which is a foil/braid/foil |
| Triaxial Cable | A cable construction having three coincident axes, such as conductor, first shield, and second shield all insulated from one another |
| Triboelectric Noise | Noise generated in a shielded cable due to variations in capacitance between shielding and conductor as the cable is flexed |
| Triple (Triad) | A cable consisting of three insulated single conductors twisted together |
| Triplex | A cable composed of three insulated single conductor cables twisted together |
| Tubing | A tube of extruded non-supported plastic or metallic material |
| Twin Cable | A cable composed of two separately insulated stranded conductors laid parallel under a common covering |
| Twin Coaxial Cable | A single cable consisting of two separate coaxial cables laid adjacent and parallel or twisted together |
| Twisted pair | Composed of two small, separately insulated wires twisted together without a common covering |
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