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The Book of Terms

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The Book of TermsThe WJI Book of Wire & Cable Terms: an interactive experience of learning and sharing
This book, written by industry volunteers and containing more than 5,000 entries, is an asset for newcomers to wire and cable.

At the same time, it also represents an opportunity for industry veterans to give back by either updating or adding to the more than 5,000 entries. This is an honor system process. Entries/updates must be non-commercial, and any deemed not to be so will be removed. Share your expertise as part of this legacy project to help those who will follow. Purchase a printed copy here.

   

 

0-9   A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Ingot

A casting, suitable for working or re-melting the solidified mass of metal resulting from the pouring of molten metal into a mold. It has a round or rec­tangular cross-section with rounded cor­ners, and the greatest dimension is always the longitudinal. Ingots are always tapered and usually cast big-end-down. In magnesium metallurgy, ingot is a cast slab of solid magnesium for remelting and casting into shapes or for rolling, extrusion or forging.

Ingot Iron

Steel so low in carbon, silicon, manganese, phosphorus, sulfur and other metalloid content that it is commonly called pure iron. Ingot iron is sometimes used for making enameling sheets. Also, silicon is sometimes added to pure iron to make high-grade electrical sheets.

Ingot Mold

A mold in which ingots are cast. Molds may be circular, square or rectangular, with walls of various thicknesses. Some molds have a larger cross section at the bottom while others are larger at the top.

Inhibitor

A material that prevents or delays oxidation and galvanic action on a connector surface, or the interface of different conductors. Also, a chemical compound, inorganic or organic, which is added to the pickling bath for the purpose of retarding the chemical action of the acid on the steel, while allowing it to continue on the iron oxides and scales until they are dissolved or removed, and the steel surface is perfectly clean. They also assist in preventing hydrogen embrittlement.

Initial Creep

The early part of the time-elongation curve for creep in which extension increases at a rapid rate. Also called primary or Stage I creep.

Initial Tension

Force that keeps closed the coils of an extension spring, and which has to be overcome before the coils will open.

Ink, Marking

See Marking or Coating Inks.

Inlet Die

See Die, Wiredrawing.

Inlet Wire

The wire entering the first die of a drawing machine.

Inner Wires

All wires of a strand except surface or cover wires.

Inorganic

Composed of matter other than animal or vegetable, such as earthy or mineral matter.

Insect Screen Wire

. A low carbon hard drawn wire with a finish suitable for electro-galvanizing or painting of the woven cloth. May be bright, coppered or galvanized.

Insertion Loss

A measure of the attenuation of a device by determining the output of a system before and after the device is inserted into the system.

Insertion Tool

A small, hand-held tool used to insert contacts into a connector.

Inside Plant (ISP)

All cable and equipment inside a central office or subscriber’s premises.

Inside Wire

Wire designed to carry a telephone circuit(s) through the customer’s premises.

Inspection

To examine carefully and determine if material or product meets specifications.

Inspection, Eddy-current

Technique used to inspect the surfaces of the rod during the rolling process. Typical defects such as cracks, surface inclusions, slivers and laps can be spotted before coiling.

Inspection, Ultrasonic

An inspection conducted on rods, tubes, etc., while they are online. Typical defects such as cracks, surface inclusions, slivers and overlaps can be spotted before coiling or subsequent drawing operations.

Instantaneous Value

The value of a variable quantity at a given instant.
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