ALUMINUM CREEPThe movement of aluminum wire away from a point where pressure is applied. (2)
The retreat of heated aluminum wire as it cools.
AMBIENT TEMPERATUREThe "surrounding temperature"as the temperature surrounding a
conductor in a compartment or within a piece of equipment.
AMERICAN WIRE GAUGE (AWG) The standards adopted in the United States for the measurement
of wire sizes.
ANTISEIZE COMPOUNDA silicon-based, high-temperature lubricant applied to threaded components
to facilitate their removal after being subjected to rapid heating and cooling.
ASBESTOSA fiber-like mineral, noncombustible and nonconductive, used as an insulating material.
BLOCK DIAGRAMA diagram in which the major components of a piece of equipment or of a system
are represented by squares, rectangles, or other geometric figures, and the normal flow of a signal or
current is represented by lines.
BRAIDThe weaving of metal or cloth material as an outer coating to a cable; prevents cable damage from
moisture and rough treatment.
BRANCHAn individual current path in a parallel circuit.
BUS BARA heavy cooper strap or bar used to connect several circuits together when a large current-
carrying capacity is required.
CABLEEither a stranded conductor (single-conductor cable) or a combination of conductors insulated
from one another (multiple-conductor cable). Small cable sizes are called stranded wire or cords.
CENTIMETER CUBEA unit of volume for large rectangular or square conductors. The cross-sectional
area equals 1 square centimeter with a length of 1 centimeter.
CIRCULAR MILThe area of a circle having a diameter of 1 mil. The standard unit of measurement of
wire cross-sectional area. One circular mil equals .7854 square miles.
CIRCULAR-MIL-FOOTA unit of volume of a conductor having a cross-sectional area of 1 circular mil
and a length of 1 foot.
COAXIAL CABLEA cable made up of a center conductor separated from an outer conductor by a
dielectric material. Normally used for radio-frequency transmission.
COMPRESSED AIR/NITROGEN HEATING TOOLA portable source of heat for use with heat-
CONDUITA tubular raceway, usually metal or plastic, for enclosing wires or cables.