| Eccentricity | Like concentricity, a measure of the center of a conductor's location with respect to the circular cross section of the insulation. Expressed as a percentage of displacement of one circle within the other. |
| EIA | Abbreviation for Electronic Industries Association |
| Elastomer | A rubber-like substance |
| Electromagnetic | Pertaining to the combined electric and magnetic fields associated with movements of electrons through conductors |
| Electromotive force | Pressure or voltage. The force which causes current to flow in a circuit |
| Electrostatic | Pertaining to static electricity or electricity at rest. A constant intensity electric charge. |
| Elongation | The fractional increase in length of a material stressed in tension |
| EMF | See Electromotive force |
| EMI | Abbreviation for Electromagnetic Interference |
| Ends | In braiding, the number of essentially parallel wires or threads on a carrier |
| Ethylene Propylene Rubber (EPR) | An ozone resistant rubber consisting primarily of ethylene propylene copolymer (EPM) or ethylene propylene diene terpolymer (EDPM). |
| External Interference | The effects of electrical waves or fields which cause sounds other than the desired signal (static). |
| Extrusion | The process of continuously forcing both a plastic or elastomer and a conductor core through a die, thereby applying a continuous coating of insulation or jacket to the core or conductor |
