---

The appropriate vakil of cur гель carrying capacities *nay be determined as described in IEC Publication 287.

In each can account may be taken of the characteristics of the toad.

The basic operating conditions for cables in air are as follows;

30*C air temperature continuous load* BLANK PAGE'

SECTION Bi CABLES WITH COPPER OR ALUMINIUM CONDUCTORS.
WITH OR WITHOUT METALLIC ARMOUR OR SCREEN

CONTENTS

Рид

1. Scope 3-B-2

2. Additional general requirements 2Л Identification of cores 3-8-2

   2. Cable marking and Identification >8-2

   3. Additional teat requirements 3-8-3

3. Cables without meta Nie covering

   2. Code designation 3-B-6

   3. Rated voltage 3-8-6

   4. Construction 3-0-6

   5. Tests 3-B-7

4. Cables with metallic coveraig

   2. Code designation 3-0-7

   3. Rated voltage 3-0-7

   4. Construction 3-B-7

   5. Tests 3-B-9

Tables: 1-15 3-ВЛ0

Appendices: З B-25

A: Guide Io use B: Current ratings

REFERENCES

References are made, in this Section В of Part 3 of HD 604, to other Parts of tNs HD end to other Harmonisation Documents and International Standards as follows:

HD 186 Marking by inscription for the identrfi cation of cores of electric cables having more than five cores.

HD 383 Conductors of insulated cables (endorsing IEC 228 and 228A)

HD 405 Tests on dectric cables under fire conditions (Endorsing IEC 332}

HD 505 Common test methods for insulating and sheathing materials of electric cables (Endorsing IEC 811}

HD 605 Electric cables : Additional test methods

IEC 287 Calculation of the continuous current rating of cables (100% load factor!

IEC 502 Extruded solid dielectric insulated power cables tor rated voltages from 1kV to 30kV.

In ell cases reference to another HD or International Standard implies the latest edition of that document.

1. Staafi

This wcton specifies requirements for and dimensions of single core and mutti-core PVC insulated and sheathed cables having reduced fir* propagation performance.

The maximum continuous conductor temperature shall not exceed 75 °С. The maximum temperature for short-circuit conditions is 160^dC.

This section covers the following desses of cables:

(И &ngl* core cables having aluminium conductors end aluminium tape armour

fib 2. 3 and 4 core cables having copper or aluminium conductors and steel tape armour.

f«ii> 2 up to 46 core cablet having copper conductors without metaibc armour

fivl 2 up to 48 core cables having copper conductors and steel tape armour,

(v) 2_r 4, 7, 8 up to 37 core cables having copper conductors and metallic screen intended for protection against electromagnetic disturbances.

2. Additional General геоииетепи

The following general requirements shall be read In conjunction with those given in Part 1.

2,1.1

Cables with or without metallic

TTlTmi

Unless otherwise specified the cores of all cables shall be identified either by numbers or by colours of the insulation in accordance with th* following sequence:

Number of cores Core numbers Core colours

One Black

Two Black, brown or light blue (neutralI

Three Black, brown, green (or green and yellow)

Four Black, brown, green, light blue (neutral)

Control cables 2.3,4. 7 and upwards Black

Numbering shall be in accordance with HD 186 and sha< be white.

2.12 Cabtea protected against electromagnetic disturbances bv metallic screen

The colour of the Insulation is black, The cores of all cables shal be Identified by numbers (2, 4,7 and upwards) <n accordance with HD 186 by using the white-coloured inscription.

The method of cable marking shall comply wrtti clause 3 of Part 1 and the following additional requirements.2.2Л ldentrf*cwKM> of category for cables with <x without metals armour

The category of the cables shall be identified by the colour of the sheathe:

• Low voltage power cable: blue

• Control cable: grey

2 2.2 Identification of characteristic*

Characteristics shal Identified by indelible legends marked on the о ver shea th along one axis of the cable and repeated in such a way that the interval between the end of the legend and the beginning of the next does not exceed two meters- This Identification comprises:

• a distinctive mark Identifying the manufacturer;

• a reference allowing each manufacturing batch to be identified;

• the number of cores, nominal area and material of conductors; for cables with metallic screen, these figures are followed by the marking " 4 E’;

• reference to the cable standard : HD 604 3-6;

Ths meter marking Iaccurate to within to ± 1%| shall be marked on another axis of the cable,

2.3 Additional test retirements

2.3.2 Л After completion of the voltage test given in sub*clause 2,3.1.1 above and when a sample of core is tested in accordance with sub-clause 3,3.1 of HD 605, the Ki value shad be not less than:

3 000 MQ.bcm at 20 *C, 20 MD.km at 60°C.

1,5 MD km at 80*C

2,3,2,2 When a sample of insulated core is tested in accordance with sub-clause З.ЗЛ of HD 606, the Ki value shall be not less than: 20 MQ.km at 60°С, 1,5 MO.km at 80*C.

2.3.2-3 When complete cable is tested in accordance with sub-clause 3.3.2 of HD 605, the Ki value aha I be not less than:

3. 000 MQ.km for single core cables.

4. x3 000 MD km for muhPcore cables.

2 3,3 Dielectric strength of oversbeath

When tested in accordance with sub-clause 3.6.2 of HD 605, using a test voltage as specified in 3.6,2.2 C, the oversheath shaM not fall.

Akemative+v the test can be as specified in sub-dause 3.2.3.1 of HD 605. using a test voltage of 10 kV de or 3 kV ac for a duration of 1 min, without failure of the oversheath.

Whan the transfer impedance of the cable sample is measured in accordance with sub clause 3.7 of HD 605_r the curve of measured transfer impedance versus frequency shall be less than 2 П and constantly decreasing from 100 kH<,

When the diameter of a sample of complete cable with metaNic armour is measured over the sheath according to the procedure given in sub-clause 6.3 of HD 505.1.1, ІП two perpendicular sections, at three places at least one metre apart, the average of these six measurements sbal be calculated.

None of the six measurements shall differ by more than 7.5% from the average value.

The test temperature shall be ambient temperature.

For armoured cables, the diameter of the test cylinder shall be:

16 D for D £ 40 mm,

24 D for D > 40 mm.

where D is the actual external diameter of the cable sample, in mm.

For control cables without armour, the diameter of the test cylinder shall be 12 D.

2.3.6.2 Before and after a sample of complete cable with metalftc screen has been tested in accordance with sub-clause 2.4.1.1 of HD 605, the electrical resistance of the screen shall be measured.

The d.c resistance of the screen shall be less than 2 Й/km at 20*C in both cases.The teat temperature shall be ambient temperature.

The diameter of the test cylinder shall be:

12(d +■ D) ± 5%

where: D is the actual external diameter of the cable sample, in mm, d is the actual external diameter of the conductor, in mm.

When the oversheath has been stripped oft the cable, the metallic screen shal be examined

No crack Ing or tearing shall be apparent. The Miner sheath shall not be visible.

When an approximately 25 m in length of complete cable is tested In accordance with sub- clause GJ .5 of HD 605, no breakdown of the cable shall occur.

The test conditions shall be as follows:

(*| conductor temperature (8015PC;

ІЫ time duration 5000h;

(c) number of thermal cycles 210.

On completion of this test, the sample shall be subjected to:

la) voltage test according to sub-clause 2.3.11: the insulation shall not breakdown;

lb) insulation resistance check: the Ki value at 20^аC shall not be less than 300 MD.km;

ІС) checking the behaviour under fire conditions by test given in sub-dause 4 J .2 of HD 605; it shall meet the requirement given In sub-clause 2.3.9,

The test shall be carried out in accordance with sub-clause 5.L4 of HD 605 under the following conditions:

1. conductor temper aw re (8512) °С,

2. time duration 1 008 h (42 days),

At the end the ageing procedure:

(a) The KE value shall meet the requirements specified in sutnclauM 2.3.2,1;

lb) The thermogravimeTric check, earned out as specified In sub-clause 2.6.2 of HD 605, shall not show a significant change in the material characteristics in comparison with the results obtained with unaged cable:(cl no extrudate shall be visible.

The characteristics of a cable in category Cl shall be such that h meets the performance requirements of HD 405.1 and that after having been tested in accordance with sub-clause 4.1,2 of HD 605, the two test pieces of cable shall comply with the following condibom

On visual inspection, the pan of the lest piece located above the top of the chimney shall show no trace of combustion,

2-3 10 Oxygen index test

During type tests, the absolute oxygen index of samples of insUabon, inner sheath (if any) and overs heath, taken from the complete cable, shall be determined using the test method given in HD 405-3 (Appendix B). The values obtained shall be used to enable a nominal value together with suitable tolerances for sample tests to be agreed between manufacturer and purchaser.

For sample tests the values of oxygen index of the insulation, inner sheath (if any) and gversheath shall bo determined using the test method given in pr HD 405.3 (Appendix Bl-

The values obtained sh«M be fall witNn the agreed tolerance on the nominal value.

3. - Cable* without metallic covering

   1. Code designation

(Under consideration by TC20)

0,6/1 kV

3-3 Construction

The conductors shal be of the material end type detailed in table 6 and shaft comply with the requirements of HD 383 for Class 2 stranded conductors.

The insulation shall be polyvinyl chkxide compound (PVC) complying with the norvalectrical requirements given In table 1 and the insulation resistance requirements given In sub'Clause 2X2,

The insulation thickness shall comply with the values specified in table 8.

For cables having 2, 3 or 4 cores, the assembly protection sha4 consist of a filler that does not create an ovwtNckness ('zero thickness* filler).

For cables having from seven cores up to 4B cores, the assembly protection shall consist either of a taping or a 'zero thickness' filler,

The о ver shea th shall consist of an extruded layer of PVC compound comptying with the non­electrical requirements given in table 1.

ha colour she! be gray.

The о vershea th thickness shea be 1 .8mm for control cables having two up to 27 cores and 2.2mm for control cables having 37 or 48 cores.

Compliance with the requirements of sub clause 3*3 shall be checked by inspection and by the tests specified in table 3»

Sample iosis shal be made on a sample of cable about 5m In length taken from one drum of each manufacturing series of the same type and size of cable.

If any sample should fail bn any of the tests, all the sample tests shall be made on all the drums of the same batch.

The drums failed are deemed not to comply.

С»Ым with metallic covering

3. 1 Code desicinirion

[Under consideration by TC20)

4.2 Rated yoftaoe

0,6/1 kV.

4 3 Construction

4-3 Л Conductor

The conductors shall be of the material and type detailed in tables 5, 6 and 7 and shall comply with the requirements of HD 383 fur Class 2: stranded conductors.

The insulation shall be polyvinyl chloride compound tPVCI complying with the non electrical requirements given in table 1 or 2 and the insulation resistance requirements given in sub- clause 2 3.2.

For cable a with circular conductors and having 2_f 3 or 4 cores, the assembly protection shel consist of a filler that does not create an overthickness (’zero thickness* fillerl.

For cables with sector-shaped conductors and for cables with circular conductors having 7 cores up to 48, the assembly protection shall consist either of a taping or a "zero thickness" filler

The inner sheath shal consist of an extruded layer of PVC compound complying with the non electrical requirements given in table 1,

The mean value of the thickness of the inner sheath shall be not less than the specified value lor each type and size of cable shown in tablas 10 and 15 or 11 * However, The thickness at any place may be less than the specified value provided that the difference does not exceed OJmm ♦ 15% of the specified value.

The fictitious calculation method for determining the diameter over the assembly protection is given Appendix A of Publication IEC 502.

Over the core assembly shall be applied:

either a taping or a "zero thickness * filler under an inner sheath;

or an inner sheath penetrating the space between the cores.

The inner sheath shall consist of an extruded layer of PVC compound complying with the поп-electncal requirements given In table 2.

The mean value of the thickness of the inner sheath shaM be not less than the specified value for each type and size of cable shown in table 12.

However, the thickness at any place may be less than the specified value provided that the difference does not exceed 0.1mm + 15% of the specified value.

The fictitious calculation method for determining the diameter over laid-up cores is given Appendix A of Pubkcsbon IEC 502.

For smgle core cables the armour shall consist of two tapes of aluminium, type 1050 A {At 99.5).

For multi*core cables ths armour shal consist of two tapes of soft steel without coating.

The tape armour shall be applied helically in two layers so that the outer tape is approximately central over the inner (ape

Tape armour shall comply with the following^

(al The gap between adjacent turns of each tape shall not exceed 50% of the width of the tape.

lb) The thickness of the tape* shall not differ from the nominal value specified in table 13 by more than 10%. The method of measurement shall be in accordance with tub-clause 2 1.4.3 Ic) of HD 605. The fictitious calculation method for determining the diameter under the armour к given Appendix A of Publication IBC 502.

(c) The tape* shal bo subjected to the wrapping test specified <n sub-clause 2.4.2 of HD 605. At th* end of this test, a check Is made that the armouring does not alow die underlying layer to appear st any point of the part of the sample of cable which has been bent,

4-3.6 Metallic screen {shield) (for cables protected agaetst electromagnetic disturbances)

The screen shall consist of either a copper tube or a copper tape laid longitudinally over the inner sheath, h ia corrugated to alow cable bending without damage. The lengthwise overlap of the screen tape shall be at least 5 mm.

The d.c. resistance of the screen of th* complete cable measured and corrected to 20°C shall be less than 2 D/km.

4.3.7 Oversheath

The oversheath shall consist of an extruded layer of PVC compound complying with the non­electrical requirements given in tabla 1 or 2.

Its colour is Ыие for power cables and grey for control cables with metallic armour Isee sub­clause 2.2.1) and black for al cables with metallic screen.

The oversheath thickness ol cables with metal і c armour shall bo:

te} in accordance with the specified values in table* 14 and IS for power cables;

(b> 1.8 mm for control cables having 2 up to 27 core* and 2.2 mm for control cables having 37 or 48 cores.

The oversheath thickness of cables with metallic screen shall comply with the specified value in table 12.

4.4 Іеш

Compliance with the requirements of sub-clause 4.3 shaM be checked by inspection and by the tests specified in tables 3 and 4.

Sample tests for cables wnh metallic armour shall be made on a sample of cable about 5 m in length taken from one drum of each manufacturing senes of the sama type and size of cable.

H any sample should be fail in any of the tests, all the sample tests shall be made on all the drums of the same batch.

The drums fated are deemed not to comply,ТаЫе 1 • Requirements for the non-electri cel tests for
polyvinyl chloride IPVCI for cables with or without metdEc armour