AI-3
LEAD SHEATH—A continuous jacket of lead molded around a single-conductor or multiple-conductor
cable. Generally used to ensure that conductors are protected from water or extensive moisture.
MAGNET WIRE—Wire coated with an enamel insulation and used in coils, relays, transformers, motor
windings, and so forth.
METALLIC ARMOR—A protective covering for wires or cables. Made as a woven wire braid, metal
tape, or interlocking metal cover. Made from steel, copper, bronze, or aluminum.
MIL—The diameter of a conductor equal to 1/1000th (.001) inch.
MIL-FOOT—A unit of measurement for conductors. (Diameter of 1 mil, 1 foot in length.)
MILITARY SPECIFICATIONS (MIL-SPEC)—Technical requirements and standards adopted by the
Department of Defense, which are to be met by vendors selling materials to DOD.
MULTICONDUCTOR—More than one conductor.
NEGATIVE TEMPERATURE COEFFICIENT—The temperature coefficient expressing the amount or
reduction in the value of a quantity, such as resistance for each degree of increase in temperature.
OXIDATION—The addition of atmospheric oxygen to metal to form rust, or to cause a breakdown in the
internal construction of the metal.
PETROLEUM ABRASIVE COMPOUND—A compound that causes a grinding action during the
crimping operation and removes the oxide film from the aluminum.
PICTORIAL DIAGRAM—A diagram showing pictorial sketches of the parts of a piece of equipment and
the electrical connections between the parts.
POWER LOSS—The electrical power supplied to a circuit that does no work, usually dissipated as heat.
RECEPTIVITY—The reciprocal of conductivity. (See also SPECIFIC RESISTANCE.)
RHEOSTAT—(1) A resistor whose value can be varied. (2) A variable resistor used to adjust the current in
a circuit.
RHO—Greek letter "UKR 8VHG LQ HOHFWULFLW\ DQG HOHFWURQLFV WR UHSUHVHQW WKH VSHFLILF UHVLVWDQFH RI D
substance.
SCHEMATIC—A diagram that shows, in graphic symbols, the electrical connections and functions of a
specific circuit arrangement. The schematic diagram makes tracing the circuit and its functions easier
without regard to the physical size, shape, or location of the component device or parts.
SINGLE-LINE DIAGRAM—A diagram that shows, in single lines and graphic symbols, the course of an
electric circuit or system of circuits and the component devices or parts used in the circuit(s).
SOLDERING—The joining of metals with a higher melting point than solder.
SPAGHETTI TUBING—(See TRANSPARENT TUBING.)
SPECIFIC RESISTANCE—The resistance, measured in ohms, of a unit volume of a substance to the flow
of electric current. (The unit volume used is generally the Circular-Mil-Foot.)
SPLICE—A joint formed by connecting two or more conductors.
