AWM style 20379 & 20276

UNDERWRITERS LABORATORIES INC.              APPLIANCE WIRING MATERIAL

Subj. 758     Section 2     Page 20276       Issued:  1983-08-16

                                Revised:  2003-06-05

Style 20276       Electronic Cable.

______________________________________________________________________________

Rating     60°C or 80°C, 30 V.

______________________________________________________________________________

Insulated     No. 40 AWG minimum.  Labeled or complying with AWM

Conductors    Procedure having a minimum rating of 60°C or 80°C

           whichever is applicable.

______________________________________________________________________________

Assembly      Consists of two or more conductors, twisted pairs,

           parallel pairs, or groups of twisted conductors or

           parallel pairs twisted together.  The conductors or

           groups of conductors may be laid parallel forming a flat,

           oval or round cable.  The lay of the insulated conductors

           are not specified.  A barrier layer and/or fillers are

           optional.  Manufacturer shall maintain a complete

           description of each assembly.  May use same or mixed AWG

           size.

______________________________________________________________________________

Covering      (Optional.)  A 6 mil or heavier PVC covering may be

           extruded over the conductor assembly.

______________________________________________________________________________

Shield     Optional.

______________________________________________________________________________

Jacket     PVC Class 43.

               Thickness (mils)

                 Construction A       Construction B

               External Use          Internal Use

           #Dia. under                   Minimum         Minimum

            jacket in        Minimum    at       Minimum      at

             inches__     Average   any Point   Average   any Point

           0.350 or less     20        17         15         12

           0.351 - 0.700     30        24         30         24

           0.701 - 1.00      40        36         40         36

           0.101 - 1.50      54        48         54         48

______________________________________________________________________________

Standard      Appliance Wiring Material UL 758.

______________________________________________________________________________

                            (Continued on Page 20276A)

UNDERWRITERS LABORATORIES INC.                APPLIANCE WIRING MATERIAL

Subj. 758     Section 2     Page 20276A        Issued:  1983-08-16

                                Revised:  2003-06-05

Instructions  Detailed Examination.

to UL         Physical Properties of Jacket.

Representative   

           The designation of all Styles of the individual

conductors used making up the cable assembly shall be

available, and the UL Representative's tag shall indicate

if the Style is labeled or not.  If they are not labeled,

the appropriate Follow-Up Tests shall be conducted.

______________________________________________________________________________

UL         (4)  Detailed Examination.

*Counter-Check    (4)  Physical Properties of Jacket.

*Program      (4)  Heat Shock.

*          (4)  Deformation.

*          (4)  Cold Bend.

           (12) Cable Flame Test on Completed Cable,

                Construction A only.

           (12) Horizontal Flame Test on Completed Cable,

                Construction B only.

           If the insulated Styles are not labeled, the appropriate

           Follow-Up Tests shall be conducted.

______________________________________________________________________________

Marking       General.

______________________________________________________________________________

Use        Construction A:  Internal wiring or external

           interconnection of electronic equipment in Class 2

           circuits only.

           Construction B:  Internal wiring of electronic equipment

           in Class 2 circuits only.

20379

UNDERWRITERS LABORATORIES INC.                  APPLIANCE WIRING MATERIAL

Subj. 758      Section 2      Page 20379       Issued:  1985-01-31
                                Revised:  2003-03-31

Style 20379       PVC Jacketed Cable.

______________________________________________________________________________

Rating     80°C, 30 Volts.

______________________________________________________________________________

Conductors    No. 50 AWG minimum.  Material not specified.

______________________________________________________________________________

Insulation    Material not specified - for use Statement No. 1.

______________________________________________________________________________

Insulated Singles Labeled or complies with manufacturer's Procedure with

           minimum rating 80°C - for use Statement No. 2.

______________________________________________________________________________

Assembly      Two or more twisted singles or groups of twisted singles

           twisted together or groups may be laid parallel to form

           flat, oval, or round cables.  May use same or mixed AWG. 

           Lay not specified.  Barrier layer and/or fillers optional.

           Manufacturer shall maintain a complete description of each

           assembly.

______________________________________________________________________________

Covering      Optional.  PVC, 13 mil minimum at any point or a helically            

                  or longitudinally applied PTFE tape of 1 mil nominal    

           thickness (lap not specified).

______________________________________________________________________________

Shield     (Optional).  May be over one or more of the

           insulated conductors or applied over the assembly.

______________________________________________________________________________

Jacket     PVC

                                Thickness of Jacket (Mils)

                Dia of Cable                  Minimum

              Under Jacket        Minimum     at any

               In Inches       Average       Point

              ____________       __________     ________

              0.250 or less         15        13

              0.251 - 0.350         22        20

              0.351 - 0.424         30        27

              0.425 - 0.700         60        48

______________________________________________________________________________

Standard      Appliance Wiring Material UL 758.

______________________________________________________________________________

                            (Continued on Page 20379A)

UNDERWRITERS LABORATORIES INC.                  APPLIANCE WIRING MATERIAL

Subj. 758      Section 2      Page 20379A      Issued:  1985-01-31

                                  Revised:  2003-03-31

Instructions  Detailed Examination.

to UL

Representative

______________________________________________________________________________

UL         (4)  Detailed Examination.

Counter-Check (4)  Flexibility Test.

*Program      (12) Horizontal Flame Test on Complete Cable,

                Use No. 1 only.

*          (12) Cable Flame Test on Complete Cable, Use No. 2 only.

______________________________________________________________________________

Marking       General.

______________________________________________________________________________

Use No. 1         Internal wiring in Class 2 circuits of electronic equipment

           where each end is terminated in connectors.

______________________________________________________________________________

Use No. 2     Internal wiring in Class 2 circuits of electronic equipment

           or external interconnection in Class 2 circuits of  

           electronic equipment where not routed along walls, floors,

           or other abuse areas.

非常感谢，我这只有20276的标准，这样我就全了

不错，又学到一点！

哪位可否解释一下中文呢？