E
(1) Symbol for voltage. Usually used to represent direct voltage or the effective (root-mean-square) value of an alternating voltage
(2) A UL cable type. Elevator lighting and control cable

Earth
Britsh terminology for zero-reference ground

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

ECTFE
Ethylene chlorotrifluoroethylene. Halar is an Ausimont Co. trademark for this material. Used as an insulation or jacketing material

Eddy Current
Circulating currents induced in conducting materials by varying magnetic fields

EIA
Electronic Industries Alliance. The US national organization of electronic manufacturers. It is responsible for the development and maintenance of industry standards for the interface between data processing machines and data communications equipment

Elastomer
Any material that will return to its original dimensions after being stretched or distorted

Electromagnet
A device consisting of a ferromagnetic core and a coil that produces appreciable magnetic effects only when an electric current exists in the coil

Electromagnetic
Referring to the combined electric and magnetic fields caused by electron motion through conductors

Electromagnetic Coupling
The transfer of energy by means of a varying magnetic field. Inductive coupling

Electro-Mechanical Cables
Dual purpose composite cables made up of support strands capable of supporting predetermined loads together with communication, coaxial, or power as integral members of a finished cable

Electromotive Force (EMF)
Pressure or voltage. The force which causes current to flow in a circuit

Electron
An elementary particle containing the smallest negative electric charge; Charge 5 0.16 attocoulomb. Diameter 5 1 femtometer

Electron Volt
A measure of the energy gained by an electron passing through an electric field produced by one volt

Electronic Wire and Cable
Wire cable used in electronic applications

Electro-Osmosis
The movement of fluids through dielectrics because of electric current

Electrostatic
Pertaining to static electricity, or electricity at rest. An electric charge, for example

Electrostatic Coupling
The transfer of energy by means of a varying electrostatic field. Capacative coupling

Electrostatic Discharge (ESD)
An instantaneous flow of an electrical charge on a nonconductor through a conductor to ground

Electro-Tinned
Electrolytic process of tinning wire using pure tin

Elexar
Shell trademark for a thermoplastic elastomer (TPE)

Elongation
The fractional increase in the length of a material stressed in tension

EMA
Electrical Moisture Absorption. A water tank test during which sample cables are subjected to voltage and water maintained at rated temperature; the immersion time is long, with the object being to accelerate failure due to moisture in the insulation; simulates buried cable

Embossing
Identification by means of thermal identation which leaves raised lettering on the sheath matarial of cable

Emergency Overload
A situation in which larger than normal currents are carried through a cable or wire for a limited period of time

EMI
Electromagnetic Interference. External signals that disrupt the data being transmitted on the local area network or electronic device being operated. Typically, these external signals emanate from universal motors with brushes, fluorescent lights, personal computers, printers or other devices including copy machines, etc. The Federal Communications Commission (FCC) regulates this emission area

Endosmosis
The penetration of water into a cable by osmosis; aggravated and accelerated by DC voltage on the cable

Ends
In braiding, the number of essentially parallel wires or threads on a carrier

Energize
To apply rated voltage to a circuit or device in order to activate it

EO
A UL cable type. Elevator lighting and control cable with thermoset insulation

EOT
End of Transmission Character. A transmission control character used to indicate the end of transmission, which may include one or more texts and any associated message headings

EP, EPR, EPM, EPDM
Designations for a synthetic rubber based upon the hydrocarbon ethylene propylene

EPA
Environmental Protection Agency. The federal regulatory agency responsible for keeping and improving the quality of our living environment - mainly air or water

EPDM
Ethylene propylene diene monomer

EPRDM
Erasable Programable Read Only Memory

EPR
Ethylene Propylene Rubber

Equilay Conductor
See Concentric-Lay Conductor

ET
A UL cable type. Elevator lighting and control cable with thermoplastic insulation, three braids, flame-retardant and moisture-retardant finish. May have steel supporting strand in the center, 300V

Etched Wire
A process applied to Teflon® wire in which the wire is passed through a sodium bath to create a rough surface to allow epoxy resin to bond to the Teflon®

ETFE
Ethylene tetrafluoroethylene. Tefzel is DuPont's trademark for this material

Ethernet
A baseband local area network specification developed jointly by Xerox Corporation, Intel Corporation, and Digital Equipment Corporation to interconnect computer equipment using coaxial cable and "Transceivers"

ETL
Electrical Testing Laboratories Inc

ETPC
Abbreviation for electrolytic tough pitch copper. It has a minimum conductivity of 99.9%

Exit Angle
The angle between the output radiation vectors and the axis of the fiber or fiber bundle

Expanded Diameter
Diameter of shrink tubing as supplied. When heated the tubing will shrink to its extruded diameter

External Wiring
Electronic wiring which interconnects subsystems within the system

Extruded Cable
Cable with conductors which are uniformly insulated and formed by applying a homogeneous insulation material in a continuous extrusion process

Extrusion
A mthod of applying insulation to a conductor or jacketing to a cable. The process is continuous and utilizes rubber, neoprene or a variety of plastic compounds

Electrical Characteristics