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The Book of Terms

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.

   

 

All   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

Spiral Stripe

A color-coding stripe applied helically to the surface of an insulated wire or cable.

Spiral Striping

Helical bands are continuously wrapped around a wire similar to a barber pole stripe. Multi-colors are applied simultaneously and both the width of the stripe and the angle of the stripe can be varied to provide multiple codes for identification.

Spiral Wrap

The helical wrap of a tape or thread over a core.

Spiraling

The formation of an element from electric resistance wire by feeding it on to a rotating element.

Splash Mark

Caused by molten copper splashing and swirling against a mold during a continuous casting operation. This affects the quality of the cast bar surface.

Splice

A connection of two or more conductors or cables to provide good mechanical strength as well as good conductivity.

Splice Closure

Device used to protect a cable or wire splice.

Splice Tray

An enclosure used to organize and protect splices.

Splice Tube

The movable section of vulcanizing tube at the extruder.

Splicing

The joining of two wire ropes by cutting out alternate strands from the end of each rope. The length of cut is deter­mined by the diameter and the remaining strands are interlaced in place of the strands cut out of the other rope.

Splicing Loss

See Coupling Loss.

Split

A division in the body of a wire running lengthwise for a considerable dis­tance, and which will open on bending. Among other causes, this can occur after drawing one or two passes from a piped rod.

Split Die

See Segmented Die.

Split Fitting

A conduit fitting which may be installed after the wires have been installed.

Split-Conductor Cable

A cable in which each conductor is divided into two or more sections insulated from each other and nor­mally connected in parallel.

Split-Ring Winding

The original method of constructing toroidal transformers by threading preformed coils on to cut sec­tions of core rings that were then built up and bolted together to form a laminated ring core.

Sponge Iron

The material produced by the reduction of iron oxide with carbon, without melting.

Spool

See Reel.

Spooler

A type of packaging unit that has a solid core where material is wound upon it. The material is loaded by an applied to the core, with tensioning controls and oscillating arms used to ensure that a uniform layer is made for easy removal for end users. Commonly used for cables and tie. See Take-up.

Spooler Tension

Force on a spooler to create the desired wrap and position of the windings as the spool is receiving wire.
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