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IS(Hc

v.TThm

Indian StandardPVC INSULATED CABLES FOR WORKINVOLTAGES UP TO AND INCLUDING1100 VOLTS- SPECIFICATION

( Third Revision )

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Power Cables Sectional Committee, ETD 59

FOREWORDThis Indian Standard (Third Revision) was adopted by the Bureau of Indian Standar19 February 1990, after the draft finalized by the Power Cables Sectional Committee hadapproved by the Electrotechnical Division Council.

This standard was originally published in 1955 and was subsequently revised in 1964 whensplit up in two parts, Part 1 dealing with copper conductors and Part 2 dealing with alumconductors. Second revision was brought out in 1977 when the two parts were merged, incthe requirements of weatherproof cables previously covered in IS 3035 (Part 1) : 1965. Tvoltage grades specified as 250/440 V and 650/l 100 V were also merged. The third revision standard has been brought out to take into account the experience gained since then to alignthe international practices, to the extent considered appropriate.Major changes in this revision include the rationalisation of terms used for the type of cabluse under special conditions, inclusion of single core flexible cables and five core tlexible stipulation of overall dimensions and updating the references to the Indian Standards on condinsulation, sheath and methods of tests. Also for single core sheathed cables the process ofextrusion of insulation and sheath has been eliminated.

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Indian StandardIS 694 : 1

PVC INSULATED CABLES FOR WORKINGVOLTAGES UP TO AND INCLUDING1100 VOLTS- SPECIFICATION

( Third Revision )SECTION 1 GENERAL

1 SCOPE1.1 This standard covers the requirements andtests for the following types of unarmoured PVCinsulated cables with copper or aluminium con-ductors and flexible cords with copper conductorsfor electric power and lighting (including weatherproof cables and cables for low temperatureconditions) for voltages up to and including1100 v.

NOTES1 For use as weatherproof cables, the cables shallmeet the requirements of additional ageing test[set 15.4 (c) I.

1.4 The cables covered in this standard are suitable for use under outdoor or low temperatuconditions provided these meet the additionrequirements as given under type tests. For lower temperature, the purchaser may specify additional requirements.2 REFERENCES2.1 The standards given in Annex A are necessadjuncts to this standard.3 TER[MINOLOGY3.1 For the purpose of this standard, the detions given in IS 1885 (Part 32) : 1971 IS 10810 ( Part IO) : 1984 shall apply.

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IS 694 : 19905 INSULATION5.1 The insulation shall be of PVC compoundconforming to the requirements of Type A ofIS 5831 : 1984.6 FILLERS6.1 The fillers shall consist of vulcanized rubber,unvulcanized rubber, thermoplastic compound ortextile materials.6.2 The filler materials shall be suitable foroperating temperature of the cable and compatiblewith othy components of the cable. These shallnot be harder than PVC used for insulation andsheath.7 BINDER TAPE7.1 Binder tape shall consist of plastic or proofedtextile material.

8 SHEATH8.1 The sheath shall consist of PVC compoundconforming to the requirements of ST 1 type of

10.3 Tolerance on Thickness of InsulationThe smallest of the measured values of of insulation shall not fall below thevalue ( fi ) specified in the relevant tables than ( 01 mm + 01 ti ).10.4 Application of InsuIationThe insulation shall be so applied thclosely on the conductor and it shall beto remove it without damage to the cond

11 CORE IDENTIFICATION11.1 Cores shall be indentified by colouring of PVC insulation. The colouras given in Table 7 shall be adopted.12 LAYING-UP OF CORES12.1 Flat Twin and Three-Core Cables ( WECC )Two or three cores shall be laid side by s

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IS 694152.1 A recommended sampling plan for ance tests is given in Annex B.15.3 Routine TestsThe following&all constittite routine tests:

a) Conductor resistance test, andb) High voltage test.

15.4 Optional TestThe test given in Table 9 shall constitute otests.

13 SHEATHING13.1 The sheath, where applicable, shall beapplied by extrusion. It shall be applied:a) Over the insulation in case of single-corecables? and

b) Over the laid-up cores in other cases.13.1.1 The sheathshall be so applied that it fitsclosely on the laid-up cores and it shall be possi-ble to remove it without damage to the insulation.13.2 Colour of the SheathThe colour of the sheath shall be black or anyother colour as agreed to between the purchaserand the supplier.13.2.1 For weatherproof cables, the colour ofsheath shall be black only.13.j Thickness of SheathThe thickness of PVC sheath, determined bytaking the average of a number of measurements,shall be not less than the nominal value ( k )

16 DETAILS OF TESTS16.1 Methods of TestsUnless otherwise stated, the tests shall be out in accordance with appropriate pIS 10810, taking into account the addinformation given in this standard.16.2 High Voltage Test ( Water Immeraiqn( Type Test )

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IS 694:199016.3.1.1 Single-core cables shall be immersed inwater at ambient temperature one hour beforethe testing and the test voltage shall be appliedbetween conductor and water for the specifiedperiod.16.4 Spark Test ( Routine Test )Spark test may be carried out as an alternate tohigh voltage on single core unsheathed cables.The voltage shall be as specified below:

Thickness o_f Insulation Test Voltagemm kV (rms)Up to and including 10 6Above 10 and up to and including 15 10Above 15 and up to and including 20 15Above 20 and up to and including 25 20Above 25 2516.5 Flammability TestThe period of burning after removal of Hame shallnot exceed 60 seconds and the unaffected( uncharred ) portion from the lower edge of thetop clamp shall be at least 50 mm.

indented or embossed on the cable. In cof these methods can be employed, opurchaser so desires, colour identi&ation in accordance with a scheme to be appthe Bureau of Indian Standards shall be eThe printing, indentation or embossingdone on the insulation in case of uncables and on the sheath in case of cables. The distance between any two coprintings, indentations or embossings shamore than 1 m.17.2 Cable CodeThe following codethe cable:

Colistituentshall be used for de

CodAluminium conductor PVC insulation PVC sheathEarth continuity conductor (ESuitable for outdoor use Suitable for low temperature

NOTE - No code letter is required whenductor material is copper.

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IS 6SECTION 6 TABLES

Table 1 Construction of Conductor( czuuse 9.1 )

Nominal Cross-sectional Areac_________--h-_---_--_----.

Copper Aluminiummm* mn 1Up to and including Up lo and including6 mm2 10 mm?

Solid/Stranded

Solid/Stranded

Flexibilit?

Class I ( TablClass 2 ( Tabl1s 8130 : 1984

Above 6 mm Above 10 mm Stranded Class 2 ( TablIS 8130 : 198Table 2 Single-Core PVC Insulited ( Unsheathed ) Cables

( Chuses 10.2 and 14.1 )Nominal Cross- NominalSectional Area Thickness ofof Conductor Insulation ( 11)

Overall NominalDiameter, I Cross-SectionalMax Area of Conductormm mm(1) (2)

10 0715 0725 08

323442

mm*(1)

507095

NcminalThickness ofInsulation (ti );1?:

I414I6

D

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T able 5 P VC I nsu lat ed an d sh eat hed Cables( Claws 10.2, 13.3, and 14.1 )

Nominal Nominal Nominal Thickness of Sheath ( fS ) Nominal Overali IXrnensions.Cross- Thidmess ~ ....----. = Cross-st!ct!colaJl Single ~ MrJxof Inm- rwi n Three Four .SectionaiIation ( r, ) ,- _____ A. Core Core Core

Core Area of Single TwinConductor Flat Twin Flat TwECC Core Core c:: ;&- Core wiCircular Eccmm nml mm mm mm mma mm(1) (Y (3) (,4) (5) (6} (7) :8; (9)

0% ()8; . 09 09 0906 1o08 470.9 8225 09 090-1 08 5010 1o 1o ;:; 58 ~:.;4 08 tY9 1o 1 108 1509 68 1201$ 11 11 l;1() 2509 7812 12 13513 40 88 J65

1()E 1 o 13 13 1412 60 10511 19035 14 1s 16 12 11 125 23015 I 6 17 135 25550 14 12 16 17 1-8 155 295

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