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请问电话线标准是什么？哪里能下到呢？ - 无图版
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UNDERWRITERS LABORATORIES INC. APPLIANCE WIRING MATERIAL
Subj. 758 Section 2 Page 20251 Issued: 1983-02-23
Revised: 2003-08-07
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.
Flexibility Test, unaged, if unable to perform Physical
Properties on tinsel and/or stranded conductors.
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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.
(4) Flexibility Test, if unable to perform Physical
Properties on Tinsel and/or Stranded Conductors.
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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".