OTS €#330) 87 MH 4933608 OO2%6}2 2 a ———— UDC 621,316.342.072.2 : 678.4 ® JAPANESE INDUSTRIAL STANDARD e Rubber Insulated Flexible Cords @ - JIS C 3301+ e Translated and Published by Japanese Standards Association ‘Copyright by the Japanese Industrial Stancarcs ‘Sat Jan 24 14:34:11 2004JIS C#330) 87 MH 4933608 0029623 4 mm | In the event of any doubt arising, the original Standard in Japanese is to be final authority. Copyright by the Japanese Industrial Standards ‘Sat Jan 24 41:34:11 2004JIS #3303 87 MP 4933608 OO2%b34 b a UDC 621.315.342.072. 2:678.4 e@ JAPANESE INDUSTRIAL STANDARD gis Rubber Insulated Flexible Cords C 3301-1980 1. Seope ‘This Japanese Industrial Standard specifies rubber-insulated flexible cords, hereinafter referred to as the "cords", to be used mainly for indoor pendant ‘luminaires or emall electric appliances, a.c. 300 V or below. Remark: The units and numerical values shown in{ } in this Standard . are based on the traditional units and are currently the criteria in force. 2, Classes and Symbols ‘The classes and symbols of the cords shall be as given in Table 1. Applicable Standards: 318 C 3004-Testing Method for Rubber Insulated Wires and Cables @ JIS C $102-Annesled Copper Wires for Electrical Purposes 318 C 3152-Tin Coated Annealed Copper WiresJIS (#3302 87 WM 4933608 OO25b35 8 ww a © 3901-1987 Table 1 e Class Symbol(*) Remark Rubber-insulated twisted cord TF Insulated with natural Rubber-insulated braided cord FF rubber ‘Rubber-insulated round breided cord | RF ‘SBR-insulated single-core cord ‘SBF SBR-insulated twisted twin cord STF ; Insulated with styrene ‘SBR-insulated braided cord SEF putadien rubber (SBR) ‘SBR-ingulated round braided cord | SRF ‘SBR-insulated flat cord SSFF ® Chloroprene-insulated braided cord | NFP Chioroprene-insulated round braided | ypp Insulated with cord chloroprene Chloroprene-insulated flat cord NNFF EP rubber-insulsted braided cord EPFF Selec eee et Insulated with ethylene- EP rubber-insulated round braided | pppp pice ylene raster cord (EP rubber) ‘FP rubber-insulated flat cord EPPEF Rubber-insulated cabtyre round cord | CTF Insulated with natural rubber and sheathed Rubber-insulated cabtyre oval cord | CTFK with natural rubber @ ‘Rubber-ingulated chloroprene cabtyre| prot round cord Insulated with natural eee | rubber and sheathed Rubber-insulated chloroprene cabtyre RNCTFK with chloroprene oval cord EP rubber-insulated chloroprene cabtyre round cord eee Insulated with EP rubber and sheathed BP rubber-insulated chloroprene PNCTFK with chloroprene cabtyre oval cord Note (+) Symbols designate the followin, R: natural rubber, 8: SBR, N: chloroprene, P or EP: EP rubber, SP: single-core cord ‘TP: twisted twin cord, RF: round braided cord, FF: braided cord, FF: flat cord (preceded by the insulation symbol), CTF: cubtyre @ cord, K: oval ‘Sat Jan 24 41:34:11 2008j 3. Charaotertation ‘The charactariaticn shall be as given in Table 2 when tested by the method specified in 5. Table 2 Item ‘Characteristics bcgon pes psed Conductor resistance Not to exceed the values in Attached Tables 1n water “To withstand 1000 V for 1 min Hisotrlc strength Tn aie “Fo withstand 8000 V for 1 min ‘Spark To withatand 5000 V for at least 0.16 200 Insulation resistance ‘Not less than the values in Attached Tables test-tose 2 © ‘Conductor alaccloration by heat Conductor surface shall not Aaclor markedly ae arama raver” [Beoilewrength | 0.0 Raton? (6.08 MA) in ae ‘Elongation 250 8 min. 5 Tene strength [0-8 egtinn? (0.00 MPa) ain | son tnnuation t Hiongution [300 0a _ te == 0-6 xgtinn¥ 60 MPa) win. | taagiation ‘Hlongetion 250 Vain. * ‘Other than | Tensile strength | 0.4 kgt/mm' (3.92 MPa) min. i gp | cabtyre HE. (Sore [Rongetion [300 tin, 4 | ines “Fenaile etrength [0.7 kgf/mm? (6.67 MPa } win. B | etion | CADET mol é} Hiongstion_—[400 vain wm 1 atuz00 soneeen mm Le COEESD SIPserps meu common wa annoy ‘Table 2 (Continued) (pplcable subclause = Charectriicn = for teat method, [Natural vabper | Tenale atrength | 0.0 igt/mm? (7.05 MPa ) min. aan ‘Elongation 300 & min. 5.7 ik er ee F lesen ‘Elongation ‘900 & min. Tara rapper [Tena strength | Not leas than 60 ofthe valve before ge }ineutation ‘Elongation ‘Not less than 60 ¢ of the value before aging Gon macmuoa | Fenlio strength | Not les than 10 Vot the valve before ang Tiogation [ot oo than TO 0 of the value before aging 4 lomageme [Feat arenes [ot ew tn 6 Va he vale Dt i ee ‘Elongation ‘Not less than 60 $ of the value before aging se Gy [otter than | Tease vtrengtn | Notions than 6 ¥ of the value before aging E22, | saber SIE [SE [ments [por ie a 0 ate ae tee 3 | neu fensile streng 8s Iue before 44 Se | coaagoe [Benes trot [ Not len than 0 8 of te valve efor ang i cm Blongetion Tot less than 80 8 of the value before aging a 2 mamas | Tents strength | Not lee tan 60 Vt the value before aging a THemgation [Not oe than 60 0 of the vals before ang “enalostongth [ot ose than 68 0 of the value belor ago Chioroprene see comets ‘Elongation ‘Not less than 65 § of the value before aging [mt arsez00 voreebh mm ce TOEES? SIPsermons mon staan a aes ‘Table 2 (Continued) Tea ‘Characteristics Tpplicable substaass ‘or teat method, "Flame retardance (chloroprene) Flexibiity (for flat type cord) ~_| Pate sat go out nataraty within 60 s00 ‘The number of broken 3f wires in each, conductor not to exceed 606 take place. No development of cracks, faws for other faulta in the insulation ‘Twisting resistance ‘The number of broken component wires in each conductor not to exceed 80 8 are best-t0ee 9 $ me $r4u200 POECLK MM LO COREE) SIPJTS €#3303 87 MH 4933608 002934 5 I 6 © 3301-1987 4, Materials, Construction and Method of Manufacture ‘The materisis, construction and method of manufacture shall comply with Attached Tables and the following particulars: (@Q) Conductors The conductors shall be stranded wires composed of the ‘annealed copper wires specified in JIS C 3102 of of the tinned annealed copper wires specified in JI8 C 3152. The wires may, however, be plated with tin-lead alloys instead of tin plating. The conductors may, if necessary, be wrapped crosswise with yarns or covered with suitable tapes. (2) Insulation ‘The conductor of 4.(1) shall be covered with one of the nsulating materials given in Table 1, to the thickness given in Attached Tables. The average thickness of the insulation shall be not less than 90 & of the appropriate value in Attached Tables and the minimum of the measured values shell be not less than 80 & of the appropriate value in Attached Tables. e (3) Inner Braid For braided cords and round braided cords, yarns shall be braided (including knitting) around the insulation of 4.(2) as the inner braid. However, if particularly specified, rubber impregnated cloth tape may be applied instead of inner braid. (4) Identification of Cores _ Identification of cores shall be made, as speci- fe 3, by the colour of yarn inserted in the inner braid, the colour of rubber impregrated cloth tape or the colour of insulation. However, for twisted twin cords and flat cords, identification may be made by providing on only one of the cores the coloured thread indicating the kind of insulation specified in 9.1. ‘Table 3 Black, white, red or Diack, white, green Black, white, red, green (S) Outer Braid The outer braid shall be closely formed with twisted ia of cotton yarns (mostly luster yarns), rayon yarns or other yarns. Unless otherwise specified, the outer braid shall be of luster yarns ‘of maroon colour. (6) Sheath For the sheath af the cabtyre cord, sheath materials shown Toble 1 shall be used. The average thickness shall be not than 90 § of the appropriate value in Attached Tables and the minimum of the measured values shall be not less than 70 % of the appropriate value in Attached Tables. by the Japanese Industrial Standards Sal dan 24 11:31:19 2004JIS C2330} 87 MH 4933608 0027620 } om 1 © 3301-1987 (1) Single-Core Card : Single-core cords shall be formed by applying the FREE TRET of 4.(5) on the insulation of 4.(2). (8) Twisted Twin Cord Requires number of single-core cords of 4.(7) hall be stranded in circular form. The lay ratio of the strand shall be not more than 16 times the mean helix diameter, and the direction of strand shall be Z-lay. (S) Braided Cord Requires number of cores covered with inner braid or rubber impregnated cloth tape specified in 4.(3) shall be stranded in circular form, and then the outer braid of 4.(5) shall be put on them. ‘The lay ratio of the strand shall be not more than 25 times the mean helix diameter, and the direction of strand shall be Z-lay. For 3- or 4-core cords, cores may, however, be stranded with yarn filler in the centre af stranding. (10) Bound Braided Cord Requisite number of cores covered with inner ‘OF yregnated cloth tape of 4.(3) shall be stranded in circular form by filling the space between the cores with yarn filler, and then the outer braid of 4.(5) shall be put on them. The lay ratio of the atrand shell be not more than 25 times the mean helix diameter, and the direction of strand shall be Z-lay. (11) Flat Cord Two conductors of 4.(1) arranged in parallel with a fixed ‘space between them shall be covered with the insulation having the ‘eppropriate thickness shown in Attached Tables. The cords shall be 80 formed that 2 cores can easily be divided in two. (12) Gabtyre Round Cord Requisite number of cores of 4.(2) shall be ig up the space between cores with rubber. The lay ratio of the strand shall be not more than 20 times the mean helix diameter, and the direction of strand shall be Z-lay. And then the sheath of 4.(6) shall be covered thereon. Cotton yarn or other soft fibre may be used as filler instead of rubber filler. Further, cotton yarn, other fibres or tapes mey be place on them. (13) Cabtyre Oval Cord Two cores of 4.(2) arranged closely in parallel SGEV es covered with the sheath of 4 (6). In this procedure, the space between 2 cores shall be filled up with the sheath material. 5. Test Methods 5.1. Ay ‘The appearance test shall be made in accordance with the mettoN ofS spocified in a18 © 3005. 5.2 Construction The construction test shall be made in accordance with the method of 5. specified in JIS C 3005. 5.8 Conductor Resistance The conductor resistance test shall be made in accordance with the method of 6. specified in JIS C 3005. 11 2008JTS C#3303 87 MH 4933608 002562) 3 mm | 8 © 3301-1987 5.4 Withstand Voltage Test The withstand voltage test shall be made by one of the Yollowing methods (1), (2) and (3). (2) Test in Water The test shall be made in acoordance with the method x in 318 C 3005. Except for flat cord and cabtyre cord, tests shall be made on half-finished products (which means the conductors covered with insulating material, and this definition shall apply hereinafter). (2) Test in Air The test shall be made in accordance with the method @f 8.() specified in JIS C 3005. () Spark Test ‘The spark test shall be made on half-finished products with the method of 8.(3) specified in JIS C 3006, and 10 $ of the samples having passed this test shall further be tested in water as specified in §.4 (1) 5.5 Insulation Resistance The insulation resistence test shall be made 6 in accordance with the method of 9.1 specified in 318 C 3005. 5.6 Conductor Discoloration by Heat The test conductor discoloration by neat shalf'Gs asts-ir spondence eth tho method of 17. specified in 318 C 3006. No test shall, however, be made on plated conductors. 5.7. Tensile Strength and Elongation ‘The test for tensile strength and elongation shall be m Sniig in scnordance with the method of 18, specified in ‘JIS C 3005. 5.8 ‘Therinal Ay ‘The thermel aging shall be tested in accordance with ate oT TO setited in SIS C 2006." The duration and temperature of the . thermal aging shall, however, conform to Table 5. B in 19.2 of JIS C 3006 for natural rubber and chloroprene sheath and to Table §. C in 19.2 of JIS C 3005 SBR, EP rubber and chloroprene insulation. 5.9 Flame Retardance The flame retardance test shall be made for chloroprene Cif the cord is braided, the braid shall be removed) in conformity to 28. of JIS C 3005. The test method shall be in accordance with 28. 2 (2) 6 of thet Standard. 5.10 Flexibi ‘The flexibility test shall be made on flat cords in accord- ance with the method of 29.(4) specified in JIS C 3005. 5.11 Twisting Resistance The twisting test shall be made in accordance with the in JIB C 3005. No test shall, however, be made on the cords of nominsl sectional area 3.5mm? or over and on single- core cords, flat cords or cabtyre cords. 6. Inspection Inspection shall be made on the following items in accordance with the test methods of 5., and the results shall meet the requirements of 3. and 4. Items (® to (11) may, however, be omitted partly or wholly by agreement between the parties concerned. (2) Appearance (2) Construction e ‘Sek dan 24 11:31:11 2004JIS €#3303 8? MH 4933608 O02%b22 5 mm 9 © 3301-1987 (3) Conductor resistance (4) Withstand voltage (5) Insulation resistance (6) Conductor discoloration by heat (1D) Tensile strength and elongation of insulation and sheath (8) Thermal aging (8) Flame retardance (10) Flexibility (11) Twisting resistance @ Pacts; Bach length of cord ‘shall be coiled into a bundle, and packaged suitably to avoid damage of the cord during transportation. 8. Designation ‘The product shall be designated by the class, the number of cores and the nominal sectional area; or the symbol, the number of cores and the nominal sectional area. ‘Also, for the flat cords having extra flexible stranding conductor, the composition of conductor shall be added. Example: Rubber-insulated braided cord = 2.x 0.75 mm? or FF 2x 0.75 mm* e 9. Marking: 9.1 on Cord The menufacturer's name or abbreviation shall be inaeibiy earke Tepeatedty on cords by a suitable method. Also, to identify the class of insulation, an appropriately coloured thread shown in Table 4 shall be inserted lengthwise between the conductor and insulation or directly on the insulation the cord. by the Japenese Industral Standards ‘Sat Jan 24 11:31:11 2004JTS €#3303 87 MH 4933b08 0029623 7 10 © 3301-1987 Table 4 Rubber insulation Chloroprene insulation 9.2, Marking on Bundle The bundle shall bear the label indloating the following (2) Class or symbol e (2) Symbol indicating class of conductor(*) (3) Number of cores and nominal sectional area (4) Composition of conductor (only for flat cord having extra flexible starting conductors) (5) Length (6) Mass (1) Manufacturer's name or abbreviation (8) Year and month of manufacture. Note (#) TA shall be marked for metal-coated conductors and A shall be marked for uncosted conductors, but A may be omitted.STS 43303 67 mH 4933608 0021624 5 mE u © 3301-1987 i il a4 i | gag i as e Attached Table 3. aden Condor mn an mas one ad “sAttached Table 2. ‘Twlated Twin Cords mag pene ee <5 a =e a = |= = cam [ae | Se | See | ae a) ea | | 2 | See | a me ee |e |e | es | to | ome | te | a |e} a |e |e | ta | oman | te te] | ae |e |e | se | wf oma | ote tw fataija | ele] «| = w]e fas} a fee fas | te] & | Se] oe] os | s]ome fafa lo [a] ala | oe |e | a | = sest-tose 2 w { mo sesu200 eo%cebh mm ee SOEE#D SIPserpme mompu essen 3 [Attached Table 3, Braided Cords Teaear Tiga a oe Trainee ano ay Toapasion [oqo] imation fomee omen] fSppreny | "™eaesc ad ot [Dia. | site frac [ered aaa ess ie amy ree] eos Fle | 2 fom Joma BET Be | Bose S| Cee | ee | EY |S | Ee [ioe EE |e wae fur | ae fewfew| myeele):] =| =| «(= aan [us ce] ae fam|an| ae mlalelefal a] a] ol = gos {ufo | ce fanfee] oa | aa | om) ae| ow) ofa] | om fom | om ane [asf ce | at fawlen| ae] ne | cal cal w]e | a | om | oe | ae | me eiome fal] a fiepie| as] at | ie) po] of | | | | wp me pul ele lefal eo] ofala|elefat =| =| |= te| meu [asfee {ice fesfes] af or farfuel |e fa fm] a] a] oe se | emu [asf ce] ce fomfew| ae] ce | mfr] | [x | me | | | oe se sem [ae] ce] as fom few] me] ae | caf aml | @ |e | me | oe] om | oe cfome [al ol a foster] ae [ae | ael ene te (fm | | | wp we ful el «lewle| |e falelelefa >=] al e| = te] ome [ac] ce] ae fem fan! ae | ate | anf cul elo [fom | ae] | om tof omme [arf te { ar few few] ae [ue fac] ante] eff me | | me | oe rost-t08e 9 mm 2 9244200 eooeceh mm Ze COEEe> SIPserpin momen scaoint oes ‘Attached Table 4. Round Braided Cords Se] oe ES Se. | oo SS “joe. [ee | me (ered foes | he vane tate | Se Pee | |S (CTS || - Fare depele=l=lelelerlelsttlslslele fey me PEP SPS) Spey oy yy ey | ay ey MSRP PS elp ay a [falafel] efi fae] ef ad ie mm | as} ee | an fafa] ms | ms | ca} sol oe] w@ | ot wo] we | ous | fiom [apap a fey] aly las) oye] Ste | ee wpe fule] oleae) a] sate] etels |=] «[s| = fama PPPS) pay ayo] ap | | a] elms fulalafiiel al afele|elelif al al als elas eon | as] os | xa [ame] me | ms | sae] cm) oe] w@ | 2 eee tiome feel fifepasd asf aias)eteti | a] a] a |e wpe patel eo tealal a] ow fatelefele] =, «|, = ffm PEP PSS) Ay) Sy] a] Sy at a] BMS PRP SP SESS PSE Ss] | s] es] a) a] = oe wna | 28 aa |os]ess| ae | ys | sae) se] oo] @ | so] me | os |e eine [ape Papepe ee py ai ag) iota | eye] af best-t0ee 9 Ww | mn 2equ200 eoseeLh mm ee toEE*> SIP 1STS ¢43303 87 mm 4933608 0029428 6 18 ¢ 3301-1907 Flat Cords nace aos ‘Attached Table 5. e fiom | ore imesation | Ceppres.) a co or enn oan man mam as as‘Attached Table 6. Rubber-Insulated Cabtyre Round Cords ‘Gentoo Tae |e ot, | a | ee Baterence ie om Tey [omen | ow | Toe [EH a| eo = = mf mf mf mL emeree [cote | aim | tate 7 7) | u » | |= | x ~ > ™ ce) os | maw | oo af ore | om | me - * » a max | ou af ee | em |e - » 1 alan | wwe ee |e een - © ” cu} as fmm | ous foe | ou fas foe |e “ as » a wow | ce | oe fous | oe | om | os | ow eo we Yl we [ou | ew | uo | ew | = | me - = ” | ts anu | us | one | as | oe for | me 1 a a0 men | ue | | fe | ee = = ‘Atached Table 7. Rubber-Insulated Cabtyre Oval Cords Conder — x cman name | Baternce ragber | Wear wae | ee | esr | ore = — “ sees sodas = om care | cme | este core | ere ESS om sea = = mf me | me | me [eee | cme | tm | tate = on mama ee |e ee ~ - = 1 Se S| eS « we te maw | ue [| ae | ue | at | sm | inn | ow « we (Overall diameter indivates the mejor axis. | me G2m200 voTEELn mm 29 TOEES SIP= = cores | dare |" foaree me i Pe STS a Same a ee tlafam fale] s less): wim pepee ciel elas ape pe ep ee pe ee ele ele lela| sal: ee ee eles) al ai: ePeyazyelelelslelefel es]: Fore pene eee memes SEE EE eetham | Somme | Serer = "SS [oem | = S| See | stefepspapspi fs est-roee 9 a mh oesu200 sONEEGh amszpene prone see oe heenlioe Attached Table 10, EP Rubber-Insulated Chloroprene Cabtyre Round Cords, rete | theme | Pee | See ome ‘oo |e) =< = = | = | om | [oem] | om | we | ae) ena acl rene | mas | mae] ee > = te eas [ote | ae [ou | ae | am | we fom mm » a « = lee | wa |e eee |e ns » sew | ou | ae [ou | om | am | owe | om 1s = a a we = ela eee |e fe | |e |e |e | we te ee ee ee 5 = Attached Table 11. EP Rubber-Ineulated Chloroprene Cabtyre Oval Cords oo Tews = preg er [ome | Se — [eee [cme | tm |e a foe | on | oe » w 1‘ a' GTS ¢e3303 87 Mm 45933608 002932 8 mm ¢ 3301-1987 Edition 1 Japanese Text Established by Minister of International Trade and Industry Date of Batablishment: 1961-09-18 Date of Revision: 1967-05-01 e Date of Public Notice in Official Gazette: 1987-05-12 Investigated by: Japanese Industrial Standards Committee Divisional Councfl on Electricity Technical Committee on Insulated Wires ' ‘This Engtish translation is published by: ‘Japanese Standards Association 1-24, Akasake 4, Minato-ku, ‘Tokyo 107’ Japan © ISA, 1988 ‘Sat Jan 24 11:34:11 2008