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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

Slotting Machine

Used for forming the slot in the head of a screw. Usually incor­porates a device for removing any burr formed in the slotting operation.

Slug

Commonly refers to forging blanks. See Blank.

Slug Test

See Upsetting Test.

Slurry Rating

A rating assigned to indicate the amount of contamination in one-half pound of virgin resin, with a rating of 1 the best and 100 the poorest.

Smearing

One of the variations of the ex­trusion process for coating wires with plastic. The nozzle lies back from the die and the die itself has a bearing surface called “land length.” The wire and PVC meet at the exit point of the nozzle where they are formed under pressure, drawn through the land length of the die together and emerge at the die exit. This method gives greater adhesion than tubing-on, due to the pressure created by the land length of the die.

Smelting

Metallurgical thermal processing in which chemical reactions occur to produce liquid metal from an enriched ore. The metal or matte is separated in fused form from nonmetallic materials or other undesired metals with which it is associated.

Smooth-Conductor Cable

A cable in which a smooth metallic layer in close contact with the conductor is interposed between the conductor and the dielectric.

Smut

See Carbon Smut.

Snake

A tool used to make it easier to thread wire through a buncher. The snake is threaded through the machine. The wire is tied to the end of it and then pulled through the machine.

Snake-Type Strander

See Strander, Snake-Type.

Snapover

See Flashover.

Snarl Switch

A device used to monitor feedstock from a payoff reel for quick stopping in case of a tangle.

Snarl Test

A workshop test applied to wire that is looped, pulled taut, un-looped and pulled taut again repeatedly until fracture occurs. Also known as a Looping Test.

Snippers

Instruments for cutting wires.

SNM Cable

Building wire cable that consists of an extruded core of insulation covered with an overlapping spiral metal tape and wire shield with an overall non-metallic jacketing material that is moisture, flame, oil, corrosion, fungus and sunlight resistant. The individual conductors are label types THHN or THWN. These cables are rated for 600 volts maximum.

Snubbing Tensions

Controlling spooler tension during a wiredrawing operation. This depends upon a “soft” or “hard” type of reel fill.

SO Cord

Cords made with a special oil-resistant outer jacket, which could be neoprene or similar material. The letter “O” designates this type of cable. They are designed for heavy-duty service and the neoprene jacket provides resistance to sunlight, ozone and high voltage discharge, plus the deterioration effects of oils, solvents, chemicals and acid.

Soak

See Soaking.

Soaking

Holding a metal product at an elevated temperature for a specified period so that the temperature in the material is uniform throughout the mass and achieves the desired heat treatment characteristics.

Soaking Pit

A furnace or pit for heating metal to make its temperature uniform throughout.
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