Glossary of Wire & Cable Terminology

A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z



E

EARTH FAULT - A fault that occurs when a conductor is accidentally connected to earth or when the resistance to earth of an insulator falls below a specific value.

EARTH POTENTIAL - The potential of a large conducting body, such as the earth, taken to be the arbitrary zero in the scale of electrical potential. Synonymous with zero potential.

ECM - Abbreviation for Electronic Counter Measure. The use of equipment to prevent or induce jamming of electronic equipment, missile systems, radar, radio, and other devices.

ECTFE - Abbreviation for ethylene chlorotrifluoroethylene copolymer. See ethylene chlorotrifluoroethylene. Trade name Halar. Halar is a trademark of the Allied Chemical Co.

EEA - Abbreviation for ethylene-ethyl acrylate copolymer.

EHF - Abbreviation for extremely high frequency. See frequency band.

EIA - Abbreviation for Electronics Industries Association. Formerly know as RETMA (Radio Electronics Television Manufacturers Association).

ELASTOMER - A rubberlike substance.

ELECTRICAL DUCT - Any electrical conduit or other raceway round in cross section, approved or listed for use underground, and embedded in earth or concrete.

ELECTROTINNED - Wire tinned with pure tin using an electrolytic process.

ELECTROMOTIVE FORCE - Pressure or voltage. The force which causes current to flow in a circuit. The algebraic sum of the potential differences in a circuit equals the EMF, which is measured by the energy liberated when unit electric charge passes completely round the circuit. A battery of EMF, E, will supply a current, I, to an external resistance, R:

E = I (R + r)

   where r is the internal resistance of the battery.

The term "electromotive force" strictly applies to a source of electrical energy but is sometimes misused as being equivalent to potential difference. Symbol E. Abbreviated as EMF.

ELONGATION - The state of being elongated or lengthened.

EMC - Abbreviation for electromagnetic compatibility. No emission of interference exceeding FCC limits.

EMF - Abbreviation for electromotive force. See electromotive force.

EMI - Abbreviation for electromagnetic interference.

EMP - Abbreviation for electromagnetic pulse.

ENAMELED WIRE - A conductor with a baked-on varnish enamel; may be 7 AWG through 50 AWG. Intended for use in winding motors, coils, transformers, and other applications of similar usage.

ENERGIZE - To apply rated voltage to a circuit or device, such as the coil of a relay, in order to activate it.

ENERGY - The capacity for performing work. EP - Abbreviation for ethylene propylene.

EPDM - Abbreviation for ethylene propylenediene monomer rubber.

EPN - Abbreviation for extended performance network cable.

EPOXY - A potting resin used in bonding, e.g., to bond PTFE wire to pot connectors to assure that they are moisture proof.

EPR - Abbreviation for ethylene propylene copolymer rubber. It has properties similar to butyl rubber. The polymer is chemically cross-linked.

ESI - Abbreviation for electrostatic interference.

ETCHED WIRE - A process applied to PTFE wire in which the wire is passed through a sodium bath to create a rough surface to allow epoxy resin to bond the PTFE.

ETFE - Abbreviation for ethylene tetrafluoro­ethylene. See ethylene tetrafluoro­ethylene.

ETHERNET - Local area network configuration.

ETHYLENE - A colorless flammable gaseous unsaturated hydrocarbon C2H4 that is found in coal gas. It can be produced by pyrolysis of petroleum hydrocarbon.

ethylene chlorotrifluoroethylene - A high temperature fluoropolymer of high dielectric strength (HALAR). Abbreviation ECTFE. Also abbreviated as ECTFE-XI. Halar is a trademark of the Allied Chemical Co.

ethylene tetrafluoroethylene - A high temperature insulation of high dielectric strength. Abbreviation ETFE.

ethylene tetrafluoroethylenecopolymer - A high temperature cross-linked fluoropolymer of high dielectric strength per MIL-C-17. Abbreviation XLETFE.

ETL - ETL Testing Laboratory.

EXTREMELY HIGH FREQUENCY - See frequency band.

EXTRUDE - To shape (as metal or plastic) by forcing through a die.

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.

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