---

In case of several cables within one pipe the diameter of the pipe has to be that wide that the cables do not block themselves.

It it is planned to lay single core cables of a three-phase-system through steel pipes, al cables belonging to the seme system have to pass through the seme pipa.

It is recommended to protect the pipe against chocking with sand.

6,2 Lowest permitted installation temperature

The lowest showed temperature of the cables during installation and mounting of accessories is:

0*C for XLPt or si Econe rubber insulated end halogen-free flame retardant compound sheathed cables according to HD 604 Pan 5 Section F.

The temperature is vakd for the cable itself and not foe the surroundings. If the cables do have a bovver temperature than per mined, it must be heated up.

Caro has to be taken that the temperature remains above the lowest permitted during the whole laying operation.

5.3 Puling loads

Б.3.1 For pulling in of cables by means of a pul ting-head at the conductors, the folio wing maximum values for the pulling forces are allowed:

lai For cables with copper conductors a ■ 50 N/mm* (bl For cables with al и mm rum conductors о * 25 N/mm* ІСІ The maximum pulling force for aR cables must not exceed 20,000 N

With these pulling forces it Із guaranteed that the permitted elongation of 0.2% for the conductor will not be exceeded. The maximum pulling force (PI is calculated from the total of the CSA [Si. The CSA of the screens and of the concentric conductors shall not be considered in this calculation:

P - S<<7

where

Pin N

<7 ІП N/mm*

S in

5.4 Bending radius

5-4,1 During installation the bending radius shall not fall below the foUowog values:

15 times the cable diameter for single core cables

10 times the cable diameter for multicoce cablesPage 5^18 HD 604 S1:1994 Рал & Soctxxi F

After ins taxation the bending radius shall not fall below the folowing values:

15 times the cable diameter for single core cables

10 times the cable diameter for multicore cables

5.4.2 In case of single time bending of a core - for example in front of a terminal * rt is permitted to reduce the bending radius by 50%, provided that the work is made by skilled personnel that the cable Is heated up to 30°C and that the cable is bent by means of a template.APPENDIX В

CURRENT RATINGS

The appropriate value of current-carrying capacities may be determined as indicated in IEC Publication 267. In each case account may be taken of the characteristics of the load.

The basic operating conditions for cables in air are ae follows:

30°C air temperature

continuous loadBLANK PAGE'

SECTION G : CABLES WITH COPPER CONDUCTORS AND OPTIONAL
COPPER CONCENTRIC CONDUCTOR

£Q№№

Ease

1. Scope 5-G-2

2. и Additional gerwal requirements 2-1 identification of сотеє 5-G 2

   2. Cable marking S-G-3

   3. Additional test requirements 5’G’4

3. Cables without or with concentric conductor

   2. Code designation (Provisional) 5-G 5

   3. Reted vohage 5-G-5

   4. Construction 6’G’S

4. Tests 5-G-6

Tables: 1 -9 5-G-7

Appendices: A: Guide to use E-G-21

8. Currant-carrying capacity 5-G-25

REFERENCES

References era mada, ki this Section G of Part 5 of HD 604, to other Parts of this HD and to other Harmonisation Documents and International Standards as follows:

HD 21 Polyvinyl chloride insulated cables of rated voltages up to and including 4 50/7 SO V

HD 22 Rubbar insulated cables of rated voltages up to and including 450/750V

HO 186 Marking by inscrvtion for the identification of cores of electric cables having more than five

cores

HO 383 Conductors of insulated cables (Endorsing I EC 228 and 228A)

HD 405 Tests on electric cables under fee conditions

HD SOS Common test methods for insulating and sheathing materials of electric cables

HD 602 Test on gases evolved during the combustion of materials from cables : Determination of

degree of acidity (conosrvityl of gases by measuring pH and conductivity

HQ 60S Electric cables ; Additional test methods

HD 606 Measurement of smoke density of electric cables burning under defined conations

IEC 502 Extruded solid dielectric insulated power cables for rated voltages from IkV to 30kV

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

1

This section specifies requirements for end dimensions of акц>е*соге and multi-core crosslinked polyethylene insulated and thermoplastic polyolefin sheathed halogen free cables having improved performance charsctenatices in case of fire.

The maximum continuous operating temperature at conductor shaN not exceed 90*C, The maximum temperature for short circuit conditions is 250* C.

This section covers the following classes of cables:

til Single core cables having copper conductor and a concentric copper conductor, if requested;

Гм) 2-5 core cables having copper conductors and a concentric copper conductor. H requested;

(иі) Auxiliary cables having 7 up to 40 cores with copper conductors and a concentric copper conductor, if requested.

2. Additional о eneral requirements

The fottawing general requirements shall be read in conjunction with those given in Pan 1.

The cores of cables having one up to five conductors shall be identified by colours in accordance with the following scheme:

Permissible only for cross sectional ereaa greater than or equal to 10mm* The identification of a core having a reduced сл.а- shall be: - green-yellow for cables with green-yellow core * blue for cables without greamyeflow core

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 auxfliary 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 l£C 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