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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

Round Groove

The profile of a roll that produces round rod.

Round Outside, Polygonal Inside Tube

Tube that has outside periphery of circular section and nominally concentric, regular polygonal inside periphery.

Round Wire

Wire that is circular in cross section as opposed to flat or square.

Round Wire Shields

Shields constructed from bare, tinned or silver-plated copper wire. Three types include braided, spiral and reverse spiral.

Roundness

The parameter to indicate the degree of concentricity of the cross section of the object being measured. The term “ovalness” is also used.

Router

In the electrical industry, a Level 3 Relay or an intermediate system.

Routing

The path followed by a cable or conductor.

ROV

Designation for strong sulfuric acid.

RP

Designation for performance grade rubber insulation, 60°C (140°F).

RPM

Designation for Revolutions Per Minute.

RR

Designation for rubber insulation, neoprene jacket. See USE.

RS

Designation for integral rubber insulation and jacket on single conductor cables.

RTL

Designation for Rubber Test Lead.

RTS

Designation for Reverse Twist Secondary cable.

RU

Designation for rubber insulated, latex building wire, heat resistant to 60°C (140°F) and moisture resistant.

Rubber

An elastomer capable of rapid elastic recovery. Specifically, natural rubber, the standard of comparison for elastomers. Wire insulation and jackets made of thermosetting elastomers, such as natural or synthetic rubbers, EPR, neoprene, Hypalon, butyl rubber and others.

Rubber Extruder

A screw extrusion process for vulcanizable rubber. A basic approach since the late 1800s that has been modified to adapt for plastics extrusions.

Rubber Insulation

Used for power cables of up to 1 kV and usually applied by ex­truding the rubber around the conductor. Another method is to pass the conductor sandwiched between two rubber tapes through grooved rollers that pressure-weld the rubber to form an insulating layer. The longitudinal machine used to carry out this process has two or three sets of rollers in series to apply layers of rubber to a number of conductors simultaneously.

Rubber, Chlorosulfonated Polyethylene

A synthetic rubber insulation and jacket compound.

Rubber, EPCV

A synthetic rubber insulation that is a co-vulcanizate of EP and PE.
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