CONDUCTANCEThe ability of a material to conduct or carry an electric current. It is the reciprocal of
the resistance of the material.
CORONAThe discharge of electricity from a conductor with a high potential.
CURRENT RATINGThe safe current-carrying capacity of a wire or cable on a continuous basis.
DIELECTRIC STRENGTHThe ability of an insulator to withstand a potential difference without
breaking down. (Usually expressed in terms of voltage).
DUCTILEEasily drawn out-as to form filaments or wires.
ELECTRICAL SYMBOLSGraphic symbols used to illustrate the various electrical or electronic
components of a circuit.
ELECTROLYSISThe process of changing the chemical composition of a material by passing an electric
current through it.
ELECTROSTATIC STRESSThe force exerted on an insulator by the voltage in a conductor.
ENAMELSynthetic compound of cellulose acetate (wood pulp and magnesium). Used to insulate wire in
meters, relays, and motor windings.
EXTRUDED POLYTETRAFLUOROETHYLENEA high-temperature insulation used extensively in
aircraft and equipment installations. (Emits dangerous fumes when heated.)
FEP Fluorinated Ethylene Propylene)A synthetic type of insulation.
FIBROUS BRAIDAn outer covering used to protect the insulating material of a conductor. Commonly
made from cotton, linen, silk, rayon, or fiberglass.
FLUXA material that removes oxides from surfaces to be joined by soldering or welding.
GALVANOMETERA meter used to measure small values of current by electromagnetic or
HEAT-SHRINKABLE TUBINGA plastic tube that, when heated, shrinks to encapsulate, protect, or
insulate connections, splices, terminations, and other configurations.
HEAT SHUNTA device (preferably a clip-on type) used to absorb heat and protect heat-sensitive
components during soldering.
INSULATIONMaterials used to coat or wrap conductors to prevent current leakage.
INSULATION RESISTANCEThe resistance offered by an insulating material to current leakage.
ISOMETRIC DIAGRAMA diagram showing the outline of a ship or aircraft or equipment, and the
location of equipment and cable runs.
JUNCTION BOXA box with a cover for joining different runs of wire or cable and for providing space
for the connection and branching of the enclosed conductors.
LACING SHUTTLEA device upon which lacing may be wound to prevent fouling the tape or cord and
facilitate the lacing process. (Usually made from brass, aluminum, fiber, or plastic.)