The shortest distance along an insulation surface between conductors.

Two parallel wires with a movable shunt that are connected to the output of a radio frequency source and are used mainly to measure wavelengths shorter than about 10 m (32.81 ft).

See Light Emitting Diode.

A portion of a circuit.

Molded letters and numbers in the jacket surface. The letters may be raised or embedded.

A method of specifying the weight of a conductor or wire using a standard length. Lengths of 1,000 meters or 1,000 feet are often used, although other lengths may be specified.

When an electromotive force is induced in a conductor by any change in the relation between the conductor and the magnetic field, the direction of the electromotive force is such as to produce a current whose magnetic field will oppose the change.

Designation for Low Energy Safety Circuit Wire.

Purity of a molten primary metal for casting. For example metal purity varies widely about the world, typically from 99.62% to 99.84%.

During the era of looping pit operations for rod rolling, this technique stationed an operator at a location where the rod emerged from one stand and had to be inserted into the next stand. The second stand was in close proximity of the first. As the leading end of a rod emerged from one stand, the large looping pit would allow the high-speed rod to accumulate in a loop. The operator (referred to as a catcher) would “grab” the rod with tongs and feed it into the next stand. As the second stand performed its rolling function, the accumulated rod would be guided by the walls of a pit to loop around.

Designation for Left-hand.

1) The lifetime of an object or process from creation to waste. 2) A test to determine the length of time before failure in a controlled, usually accelerated, environment.

See Voltage Life Test.

In the laser and optical communications fields, the portion of the electromagnetic spectrum of about 0 to 700 nano-meters that can be handled by the basic optical techniques used for the visible spectrum.

Scattering of light by reflection or transmission. Diffuse reflection results when light strikes an irregular surface such as a frosted window or coated light bulb.

A semiconductor device that emits incoherent light from a p-n junction (when biased with an electrical current). Commonly called LED.

A loose term that is usually understood to mean a metal with a specific gravity below 3.8.

Term used for light viscosity oil mainly in describing the fluid used in fine wire aluminum drawing systems.

Wire rod in sizes falling between 5 and 9.5 mm (0.2 to 0.37 in.) in diameter.

A device designed to protect circuits and apparatus from high transient voltage by diverting the over-voltage to ground.