---

The cores of cables having more than five conductors shall be identified by numbers in accordance with HD 1Я6 by using the base colour black, the inscription colour white and the axial arrangement of marks.

Th* method of cabl* marking shall comply as far as applicable with ebuse 3 of Pan 1 and th* following requirement*:

Th* external surface of all cable* shal be legibly marked with the following elements of marking unless otherwise specified hereafter.

HI Indication of ongin

12) Standard number

(3) Year of manufacturing

14. Metre marking

15. Code designation

16. Compliance with this section G of Pan 5 of HD 604.

17. Nominal voltage U in kV

The marking of the elements shal be on th* sheath and chad comptv with th* following requirements:

14. J Indication of origin

Manufacturer's name or Trade mark which shaN be legally protected and from which the manufacturer can be identified.

14. .2 Standard number

The standard number to be indicated shall be the number of the relevant standard complying with this section G of Part 5 of HD 604

14. .3 Year of manufectunno

The year of manufacture of the cable shall be provided at regular intervals on the outer surface of the cable. (See aub-dause 2.2.7J

2*2.4 Metre marking

Cables complying with this standard having calculated outer diameters greater than 10mm end having substantially circular shape ehal have a length marking on the sheath consisting of fotv digits

The markings ehal follow the natural numerical sequence and may start on any individual cable length with any number*

It is recommended however that the length obtained by means of the metre marking shall not <£ffer from the length obtained by a calibrated measuring instrument by more than 1%.

NOTE: The metre marking, for which a calibration is not possible, is a simple means to assess the cable length, e*g. after installation of the cable or to determine the cable length left on a delivery drum*

Digits being printed incompletely or missing metre markings over a short pan of the cable length ar* not considered as faulty* provided the cable length can be determined by the metre markings given.

For the determination of th* delivery length calibrated measuring instruments shall be used.22Л Code design a tKiQ {Provisional} {Under consideration by TC20}

See Table 9

2.2.6 Q

•ТҐЇТЧ.

■Manet with_HD 604 Part 5

A

um kv

pproval marking.

2.2.7

2.2.8 Sequent* of ttiatfafttt

The marking shall be repeated at regular intervals of not more than 50cm.

CompKanco with the gen er el requirement» shall bo checked by visual examination and measure me nt.

2.3 Additional testreqwremanta

2 3.1 Tm conditions

Unless otherwise specified the tests sbaB be made at ambient temperature of I20 ± 1SI°C.

2.3.2 Frequency and waveform of power frequency test voltaoes

The frequency of test voltages shall be in the range of 49 Hz to 61 Hz. Ths waveform shall be substantial sinusoidal. The values quoted are rms values.

2-3.3 Routine tests (RI

Routine tests shall be carried out on all finished cable lengths.

2.3.4 Sample tests (5}

Sample tests shaN be carried out on 10% of a manufacturing lot of the same cable type, І». at least on one cable length.

If any tampts should tai in any of th* sample tests requested rt is permitted to choose one w two additional sampleUI from the same cable length and to submit the additional sample tsi to the test or tests in which the original sample failed.

The samples shall be taken at least 0 5m from the cable end (a)

For the resampling procedure the folowing rules apply:

• Number of samples to be taken as for the first test;

• If for the first test one sample from both cable ends has to be taken, it is deemed sufficient to resample one additional sample from the cable end the first sample of which failed.

2.3.6 Tvoe tests (Tl

Cables according to this section shall be subjected to the type tests specified in Tables 2C and 2D.

The tests shall be carried out on not more then four cores urMss otherwise specified.

Routine and sample tests are also counted as type tests.

3

»И?ЛЇЧІ*.

. СаЫм without or with con oniric о

I Under consideration by TC20)

See Table 9_T

0.6/1 kV

Only copper conductors are permissible. The conductors shall comply with HD 383. Ош 1 for solid conductors and Class 2 for stranded conductors.

Stranded conductors having a C.S.a. of 50mm* and above shall be compacted.

Number of cores, conductor format shape and nominal c.s.a, of conductor are specified in Table 3. Over the conductor a separating layer may be appked.

For cables having one reduced conductor Table 4 appfies.

The insulation shall be a cross-linked polyethylene compound of type 2X11 and shaN comply with the requirements and tests specified in Table 1 A. The insulation wall thickness shall comply with the value specified in Table 5 The minimum thickness at any place shall not differ from the specified value by more than 0.1mm + 10% of the value specified. The measured mean value shall not be less than the specified value.

Over the insulation a separating element may be applied; it shot be applied over the initiation of single core cables with concentric conductor. Insulation and sheath of single-core cables shall be separable.

The cores of cables having two up to five cores shall be laid up. Over the laid up cores a binder tape may be applied.

The cores of multi-core cables havmg more than five cores shall be laid up in concentric layers as specified in Table 6. Over the individual layers a binding tapa may be applied.

The core assembly of mutu-core cables shal be covered completely by an inner covering which shal be easily removable

.h may consist either

• of a tape bedding

• of an extruded bedding compound, or

• of a combination of the two.

Fillers for the Interstices may be applied.

NOTE: The thickness of taped or extruded beddings need not be checked by measurement.

3,3,6 Concentric conductor

The concentric conductor Shan consist of copper wires with one or two copper binding tapes,

The number, minimum csa and maximum clearance between adjacent helices of the copper tapes shall comply with Table 7,

The clearance between adjacent wires shall not exceed the following values:

• mean value: 4mm (calculated value I;

• maximum valued: 8mm.

The concentric conductor shall be applied:

• over the separating layer of single-core cables respectively;

• over the inner covering of multi-core cables.

The thickness of the copper tapes shaN be at least 0.1mm but not more than 0,3mm.

The nominal csa of concentric conductor of аихйіагу cables shal comply with Table 8.

A separating layer shall be applied over the concentric conductor.

The dx, resistance of the concentric conductor shall comply with the relevant value given in HD 3B3

3.3.6 Sheath

The sheath shall be a thermoplastic polyolefin compound of type HM4 and shall comply with the requirements and tests specified in Table IB.

The pommel wall thickness ci the sheath It) shall be calculated from the following formula:

t = 0,02 D_A + 1 .Omni, whom D_A Is the fictitious diameter under the sheath,

NOTE: For the calculation of 0_A see IEC 502, Appendix A

The nominal wad thickness of the sheath shall be not less than 1,2mm

The thickness of the sheath at any place shall ba not less than the specified nominal value.

The sheath shall be coloured Wack throughout except for cables for intrinsically safe installations the sheath of which shall be coloured light blue throughout.

4, Tests

Compliance with the requirements of clause 3 shall be checked by inspection and by the tests specified ki Tables 2A to 2D-

Table 1A - Requirement» and tests for the ImuiatHg compound

Table IB ’ Requirements and testa for the sheathing compound