Tuesday, August 13, 2013

UL20251 Specification

UNDERWRITERS LABORATORIES INC.          APPLIANCE WIRING MATERIAL
Subj. 758         Section 2  Page 20251       Issued:  1983-02-23
                                             Revised:  2005-08-12

Style 20251       Multi-Conductor Cord.
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Rating            60°C, 150 Volts, 300 Volts peak.
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Conductor         Two to ten 18-33 AWG, tinned or bare, solid, stranded,
                  or tinsel.  May include mixed AWG sizes.
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Insulation        Polypropylene, 7 mils minimum average, 5 mils minimum
                  at any point.
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Shielding         (Optional) One or more may be shielded.
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Jacket            PVC, Class 43, 20 mils minimum average, 16 mils minimum
                  at any point.
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Assembly          Cable may be either straight or wound in retractile
                  form.  Core may be either flat or round.  Barrier
                  layer and/or fillers optional.
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Standard          Appliance Wiring Material UL 758.
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Instructions      Detailed Examination.
to UL             Physical Properties, Unaged Insulation and Jacket.
Representative    Spark Test.
                 
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UL                (4)  Detailed Examination.
Counter-Check     (4)  Physical Properties of Insulation and Jacket, 
Program                Unaged and Aged.
                  (4)  Heat Shock.
                  (4)  Cold Bend.
                  (4)  Deformation.
*                 (12) Horizontal Flame Test on Cable.
                  (
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Marking           General.
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Use               Internal cable of electronic equipment, or as
                  "Handset Wire or Telephone Cord for Subscriber Sets".


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