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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