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[問題求助] 請問電話線標(biāo)準(zhǔn)是什么?哪里能下到呢?

P:2009-04-10 20:41:19

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請問電話線標(biāo)準(zhǔn)是什么?哪里能下到呢?

passband - 通帶 (0) 投訴

P:2009-04-11 12:07:54

2

給我個標(biāo)準(zhǔn)號,我可以幫你找到!然后發(fā)給你!

planning department - 企劃部 (0) 投訴

P:2009-04-11 19:53:15

3

YDT840-1996電話線標(biāo)準(zhǔn),論壇里可以找到的

P.D.M. - pulse duration modulation脈(沖)寬(度)調(diào)制,脈沖持續(xù)時間調(diào)制 (0) 投訴

P:2011-07-25 09:59:37

4

wind-excited oscillation - 風(fēng)致振動(架空線) (0) 投訴

P:2011-07-25 11:09:05

5

給你一個相關(guān)標(biāo)準(zhǔn)下載網(wǎng)址,各行各業(yè)的標(biāo)準(zhǔn)都有,如要請聯(lián)系QQ441091752

stranding department - 絞制車間,絞制工段 (0) 投訴

P:2011-07-29 13:51:20

6

UL20251

China Report - 中國報道 (0) 投訴

P:2011-07-29 13:53:09

7

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.

______________________________________________________________________________

 

Rating     60°C, 150 Volts, 300 Volts peak.

______________________________________________________________________________

 

Conductor     Two to ten 18-33 AWG, tinned or bare, solid, stranded,

           or tinsel.  May include mixed AWG sizes.

______________________________________________________________________________

 

Insulation    Polypropylene, 7 mils minimum average, 5 mils minimum

           at any point.

______________________________________________________________________________

 

Shielding     (Optional) One or more may be shielded.

______________________________________________________________________________

 

Jacket     PVC, Class 43, 20 mils minimum average, 16 mils minimum

           at any point.

______________________________________________________________________________

 

Assembly      Cable may be either straight or wound in retractile

           form.  Core may be either flat or round.  Barrier

           layer and/or fillers optional.

______________________________________________________________________________

 

Standard      Appliance Wiring Material UL 758.

______________________________________________________________________________

 

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.

______________________________________________________________________________

 

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.

______________________________________________________________________________

 

Marking       General.

______________________________________________________________________________

 

Use        Internal cable of electronic equipment, or as

           "Handset Wire or Telephone Cord for Subscriber Sets".

 

TUFPULP cable - 一種丙烯酸粘結(jié)劑涂層紙漿纖維帶繞包絕緣電纜(美國產(chǎn)品商品名) (0) 投訴

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