| Q |
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| Quad |
A four conductor cable |
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| R |
| Radio Frequency (RF) |
Used to transmit information from point to point over the airwaves or cable |
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| Rated Temperature |
The maximum temperature at which an electric component can operate for extended periods without loss of its basic properties |
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| Rated Voltage |
The maximum voltage at which an electric component can operate for extended periods without loss of its basic properties |
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| Recovered Diameter |
Diameter of heat shrink tubing after heating has caused it to return to its extruded diameter |
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| Reference Edge |
Edge of cable or conductor from which measurements are made |
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| Resistance |
Measure of the complexity in moving electrical current through a medium when voltage is applied |
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| Retractile Cord |
A cord having specially treated insulation or jacket in order that it will retract like a spring |
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| RFI |
Radio Frequency Interference |
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| RG/U |
RG is the abbreviation for radio guide, a military designation for a coaxial cable, and U stands for "universal" |
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| RGB |
Abbreviation for the three parts of color video signal: red, green, and blue. Also refers to multi-coaxial cables carrying these signals |
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| RHH |
Rubber-insulated, heat resistant building wire |
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| RHW |
Rubber-insulated building wire, heat and moisture resistance |
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| Ribbon Cable |
A flat cable made with parallel round conductors in the same plane. Also referred to as planar or flat cable |
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| Rope Strand |
A conductor composed of groups of twisted strands |
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| Round Conductor Flat Cable |
A cable made with parallel round conductors in the same plane |
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| Routing |
Path followed by a cable or conductor |
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| Rubber Wire Insulation |
A general term used to describe wire insulations made of thermosetting elastomers, such as natural or synthetic rubbers, neoprene, and others |
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| S |
| SAE |
Society of Automotive Engineers |
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| Self-extinguishing |
The characteristic of a material that extinguishes its own flame after the igniting flame is removed |
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| Semiconductor |
Material possessing electrical conductivity that falls somewhere between that of conductors and insulators |
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| Separator |
A layer of insulating material, which is placed between a conductor and its dielectric, between a cable jacket and the components it covers, or between various components of a multiple-conductor cable |
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| SEW |
Silicone Rubber insulated equipment wire |
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| Sheath |
The outer protective covering, also called jacket, which may provide additional insulation on a wire or cable |
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| Shield |
A tape, serve or braid placed around electric cables or their components to prevent single leakage or interference |
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| Shield Coverage |
The physical area of a cable covered by shielding material |
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| Shield Effectiveness |
The ability of a shield to screen out undesirable interference or prevent signal leakage out of the cable |
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| Shrinkage Ratio |
Ratio between the expanded diameter and recovered diameter of heat shrink tubing |
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| Shrink Temperature |
Temperature which effects complete recovery of a heat shrink tubing product from the expanded state |
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| Shrink Tubing |
Tubing that has been extruded, cross-linked and non cross-linked, and mechanically expanded which when reheated will return to its original diameter. Also called heat shrink tubing |
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| Signal Cable |
Cable engineered to carry current of usually less than one ampere per conductor |
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| SIS |
Switchboard wiring made with cross-linked polyethylene insulation |
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| SJ |
Junior hard service, rubber insulated portable cord |
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| SJO |
Same as SJ portable cord, but oil-resistant outer jacket |
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| SJOO |
Same as SJO portable cord, but with oil-resistant insulation as well as an oil-resistant jacket |
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| SJT |
Junior hard service thermoplastic or rubber-insulated conductors with overall thermoplastic jacket |
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| SJTO |
Same as SJT portable cord, but with oil-resistant thermoplastic outer jacket |
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| SJTOO |
Same as STJO portable cord, but with oil-resistant insulation |
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| Sleeving |
A braided, extruded or woven tube |
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| SO |
Hard service cord with oil-resistant thermoset jacket |
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| Solid Conductor |
A conductor consisting of a single wire |
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| SOO |
Same as SO portable cord with oil-resistant insulation |
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| SOOW-A |
A UL cable portable cord type |
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| SOW |
Water resistant thermoset jacketed portable cord |
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| Span |
The distance between the center of the first conductor and the center of the last conductor in a flat cable |
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| Spiral Wrap |
The helical wrap of a material over a core |
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| SP-1 |
All thermoset, parallel-jacketed, two conductor light duty cord for pendant or portable cord used in damp locations |
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| SP-2 |
Same as SP-1 with heavier construction |
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| STO |
All thermoset, parallel-jacketed, two conductor light duty cord for pendant or portable cord used in damp locations |
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| STOO |
Same as STO portable cord with oil-resistant insulation |
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| Strand |
A single uninsulated wire |
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| Stranded Conductor |
A conductor composed of several strands or groups of uninsulated wires |
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| Strip |
To remove insulation from a cable or wire |
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| Surge |
Temporary and relatively large increase in the voltage in an electric circuit or cable |
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| SV |
Vacuum cleaner cord, two or three conductor, rubber insulated |
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| SVO |
Same as SV portable cord except with oil resistant thermoset jacket |
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| SVT |
Same as SV portable cord except with thermoplastic jacket |
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| SVTO |
SVT portable cord with oil-resistant thermoplastic jacket |
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| SW |
Rubber jacketed power supply cable |
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| SWO |
Same as SW except neoprene jacketed |
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| SWT |
Plastic jacketed power supply cable |