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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

Fin

A defect extending from end to end of a bar or other rolled section caused by the spreading of the work piece into the clearance of the rolls, thus producing a thin overfill. If rolled in another pass, a fin usually becomes a lap. A protruding rib of metal running longitudinally along a rolled product, such as results from overfilling rolling pass.

Final Tests

Those performed on the completed product (after manufacturing).

Fine Stranded Wire

Stranded wire with component strands generally of 36 AWG or smaller.

Fine Wire Cloth

Wire cloth that has finer than a 100x100 mesh count with openings of .0055 in. and smaller.

Fines

Product passing through a screen or sieve, as opposed to shorts which remain on the screen or sieve. Small particles or wire material, liberated during the drawing process.

Finish

The surface appearance of a final product whose exterior condition is critical to its function. The finish could be a parameter, such as in steel rolling, where one-side bright and standard one-side bright are types of finish specifications.

Finished Edges

Smooth edges produced by drawing or rolling.

Finishing

1) The act of dissolving materials in molten, purified metal for the purpose of changing its composition to that which is called for in the steel order. 2) Shaping-up of the melt without additions. 3) The actions of finalizing operation to achieve the desired finish of the final product.

Finishing Die

The last die on a wiredrawing machine, sometimes mounted in a special holder so that it may be set at any suitable angle relative to the wire line to ensure perfect cast of the finished wire. For certain wires a rotating finishing die is an asset, ensuring even wear on the die.

Finishing Materials

Any material that may be added to purified, molten metal in the latter stages of producing a heat of steel, i.e., for modifying its chemical composition. See Additions.

Fire Resistance Rating

The time, in hours, a material or construction will withstand fire exposure as determined by certain standards.

Fire Resistant

Property of a cable material that is able to avoid combustion for a given period of time.

Fire Retardant

Property of a cable material that is able to delay ignition for a given period of time and slow the spread of the flame once ignition has taken place.

Fire Wire

A stainless steel hollow wire used principally in the aircraft industry to reduce the likelihood of wires catching fire.

Fire-Break, Cable

Materials or devices to prevent fire spread.

Fire-Refined Copper

The result of re-melting blister copper or copper scrap in a refining furnace where air is blown through the bath and slag containing im­purities is removed. This material is not as pure as electrolytically refined copper.

Fire-Shield, Cable

Material or devices to prevent fire spread between raceways.

Firestop

A material, device, or assembly of parts installed in a cable system in a fire-rated wall or floor to prevent passage of flame, smoke, or gasses through the rated barrier.

Firewood Wire

A mild steel wire that is fully annealed, usually after being cut in lengths making up 1 kg bundles.

Fish Hook Wire

A hard-drawn wire that is generally produced from high-carbon wire, 0.9 percent carbon and upwards.
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