---

’ pulling force Is limited to 5 daN/mm^J for copper conductors and to 3 daN/mm¹ for aluminium conductors;

for power cables, pulling is directly exerted on cores;

• the pulling forces shall be permanently checked during The pulling in procedure.

The cables are then pulled out of their supports and carefuly arranged on them, so as to avoid cross-splicing and overlapping which may hinder good cable tray occupation.

Appropriate devices shal be provided along the cable run, and especially at angles, to avoid sheath tearing.

A cable leaving a horizontal cable tray, should as far as possible be removed by the bottom or in the сам of * cable trough, by the aide.

During pulkng in procedures, the bending radius shall not fan below the following values:

• 20 times we outer diameter for power cables,

16 times the outer diameter for measuring cables and control cables.In a definitive situation, the bending radius shall never be less than 10 times its outer diameter.

During pulling in, fire screens shell be provisionally sealed by means of plastic begs fitted with mineral wooL The bags shall be rearranged after each passage.

The lowest permissible temperature of the cables during installation and mounting of accessories is: '25 *C for EPR insulated and chlorosulfonated polyethylene sheathed cables,

A7.2 Cables laid on cable trays

Cable trays are used tor holding cables over their entire runs.

Two types are used, depending on the number of cables in the run:

• main raceways (width a 300mmI,

• secondary raceways (width £ 200mm],

Main horizontal raceways are those which are effectively horizontal and ihose inclined at an angle of less than or equal to 46° with the horizontal. They consist of superimposed, paraMel open o* enclosed cable nays secured to brackets, themselves secured to posts anchored to the power station structures.

Main vertical raceways form an angle greater than 45* with the horizontal. They consist of risers featuring; either the same components as horizontal cable trays, or single or double ladders, depending on whether one or both sides are to allow for cable attachment, when the raceway forms an angle of 90* with horizontal

Secondary raceways are placed in any position required for the cable run and may be integrated with main raceways. They consist of: enclosed trays, conduits or individual fittings enabling attachment of cables by means of dips.

A7.2.1 Fixing of cables ■ General ruffe

On horizontal cable trays:

• cables are laid without fixing when the inclination with respect to the horizontal is less than 20°,

• cables are fixed with dips approximately every 3 m when the inclination with respect to the horizontal is between 20 ° end 45°

In vertical risers, cables are secured approximately every metre by means of a clip-

The beginning of changes in direction are defined by supports (cross-pieces, brackets, etc. I to which cables are fixed- Moreover, the cables are secured in elbows to ensure chat they remain flat.

The сідо used are made of class-М2 plastic, the classification of materials being defined on the basts of their reaction to fire. In outdoor areas, the plastic shall be resistant to sunlight

A7.Z2 Fixing of саЫе^ * Special cases

Clips are made ol stainless tt«d <1 the following cases:

• in vertical risers more than 5 m high, * or securing three-cable bundles of single core cables to cable trays -

In addition, in ttweo-саЫе bundles of stnglecore cables, the three cables are held together over their entire run with stainless steel cOpa. The distance between consecutive clips is calculated so as to guarantee resistance to electrodynamic forces caused by short- circuits. The dipping together and fixation to the cable tray may be combined or independent,

A7.3 Qybto* laid in (гойдали) ga>ari*s

A7.3.1 Cables laid in troughs

Troughs are used in different ways depending on their capacity and the nature of саЫвн running through them

They are divided into the following types:

• low-capacity troughs carrying several different types of cables; the cablet are laid either on саЫе trays or directly on brackets 350 to 400 mm apart;

• low-capacity troughs carrying a single type of саЫе; these cables are laid dnectty on the bottom of the troughs;

• high-capacity troughs in which a 500 mm wkte passage is provided the whole length of the cable tray.

Trough routings are forbidden in rooms containing liquid fuel.

In outdoor areas, precast concrete troughs may be used, with one or more cavities per type of cable ►

A7.3.2 Cebtes laid. In аайетies

Galleries are considered to be troughs with extremely high capacity. The cable bays with which they are Fitted are the same as those specified for raceways described in sub clause A7.2

Cables are positioned accordog to the same rules as for main raceways.APPENDIX В

CURRENT RATINGS

The appropriate vibes of current-carrying capacities may be determined as described in I EC Publication 287. In either case account may be taken of the char act eristics of the load.

The bask operating conditions for cables in air are as follows:

30*C air temperatixe

continuous load'BLANK PAGE'

SECTION Q CABLES WITHOUT METALLIC COVERING.
HAVING CIRCULAR COPPER CONDUCTORS

CONTENTS

Еаді

1 ► Scope 4-C-2

Z Additional general requirements

3. Cable without metallic covering

   1. Code designation 4 C-5

   2. Rated voltage 4-C-6

   3. Construction 4C-6

   4. Testa 4 C-6

4. (Nor applicable) 4-C-6

Tatties 1-7 4-C-7

Appendix: Guide to use 4-017

REFERENCES

References are made, in this Section C of Part 4 of HD 604, to other Pans of this HD and to other HawnorMsaticTb Documents and International Standards аз fcWows:

HD 363 Conductors of msulated cables (Endorsing IEC 228 and 22BA)

HD 505 Common test methods for insulating and sheathing materials of electric cables

HD SOS Electric cables : Additional test methodes

ip al) cases reference to another HD or international Standard implies the latest edition of that document.SECTION C

1. Scooe

This section specifies requirements for and dimension! of ting le-core and mutticore EPR insulated and PVC sheathed cables having reduced fire propagation performance.

The maximum continuous conductor temperature shall not exceed 90°С, The maximum temperature for short-circuit condition is 250⁰C.

This section covers the following classes of cable;

1. Single core cables having circular tinned copper conductor, without metallic covering

{li| 2, 3, 4 and 5 core cable* having circular tinned copper conductor, without metallic covering

2. Additional general reouiraments

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

The cores of al cable* shall be identified as folows:

For tingle core cables, the core shal be green-yellow if used as protection core, or any other colour In the other case.

For cables with up to and including б core, each сена shall ba identified by one tingle colour, except the core identified by * combination of green-yellow colours.

For cables having 2 or 3 black cores, these must be identified by their position with respect to the non- black cores

The method of cable marking shall comply with clause 3 of Pan 1 and the folowing additional requirements.

The external surface of til cables shall be legibly marked as follows;

FG5R - 0.6/1 kV - 1 x cross-section or

RG58 ’ 0,6/1 kV - 1 x cross-section or

FG50R - 0 6/1 kV - n x cross-section or

RG5OR - 0 6/1 kV * л x cross-section

The legend shall be along one or more lines, and in the latter case the lines shall be approximately equally spaced around the circumference.

The gap between the end of one legend and the beginning of the next one Shan not be greater than 0.5m.

When embossing or indenting is used, the letters and figures Sha* consist of upright characters, in the legend, the maximum tif* of the characters shall be 13mm and the minimum sire 15% of the specified overall diameter or 3mm, whichever is the greater.In case of printing, the print height chill be 15% of the specHied overall diameter as * minimum. The number chai be printed in a colour which contracts with the ovenheath colour.

Compliance shall ba checked by visual examination and measurement

2 3.1 Stmptino tor toecial taroolt ittts

(a) Bactrical resistance of the conductor.

The electrical resistance of the conductor shall be checked on 20% of the finished lengths or on 5 lengths, whichever is the greeter. The measurement shall be made on *H the conductors of each length of cables selected for the test

ІЫ Insulation resistance on cable length.

The insulation resistance shal be measured on 10% of the finished lengths or on 3 lengths, whichever is greater. The measurement shal be made on each core up to a maximum of two of each length of cable selected for the test,

let Bending test.

The bending test shall be performed on samples taken from the finished lengths on the fPlowing basis:

Notes: 1. In calculating the above mentioned lengths h is permitted to assemble cables with different cross-sections.

2. ff the total length in the contract does not exceed 2km. rt is permitted to omit ihe teM provided the manufacturer can demonstrate to have successtuty performed the real on st least one similar cable sample on the occasion of previous contracts.

(dJ Construction, marking and dimensions

The construction, marking and dimensional checks shall be performed on 5% of the finished lengths, rounded upwards.

Checks relevant to cores shall be limited to three cores of each length of cable selected for the test.

(Є) Physical tests. Insulation resistance at high temperature, water absorption.

Physical tests, insulation resistance at high temperature and water absorption test shall be performed on samples taken from the finished lengths on the foiowing basis:

C

Number of
samples

able length

Above Up to and including |km| I km)

0 2

2 10

10Notes'. 1 - In calculating the above meotiontd lengths it is permitted to assemble cables with different cross sections.

2, If the total length in the contract does not exceed 2km, the test may be omitted provided the manufacturer can demonstrate to have successfully performed the sama tests on at least one кпйэг cable sample on the occasion of previous contracts.

The purchaser may wholly or partly omit the tests even in сам of delivered lengths greater then 2km, when providing reliable results of test carried out on the occasion of previous contracts.

The test pieces required for the physical tests on insulation shall be taken at random from different cores.

Insulation resistance at high temperature and water absorption shall be made on each core up to a maximum of three of each length of cable selected for the test,

(fl Repetition of the tests.

If any cabfe length (or cable sample! should fail in any of the tests a), bf and d), (he same test or tests in which the original sample Failed shall be carried out on aN cable lengths in the contract a<xJ the defective ones shall be rejected.

tf a cable sample should fail in any of bending test, insulation resistance at high temperature, water absorption test, the same test or tests in which the original sample failed shal be carried out on two further samples. Should either of them fail, the batch of which these samples are representative shaN be regarded as failing to comply.

If a cable sample should fail in any of the physical tests* the same test or tests shal be carried out on another sample In this case the sample shall have a sufficient length to allow the test pieces to be taken from positions at least Im арап.

Should the new sample faa* the hatch of which this sample is representative shall be regarded as failing to comply.

The number of cores to be checked shall be as stated in items a) to «).

When the overall dimension of the cable is checked in accordance with sub-clause 2.L3.1 of HO 605, the mean overall dimension shall comply with the values specified in Tables 4 to 7 When ovality of the cable is checked in accordance with sub-сіаим 2 J .3.2 of HD 606* the difference between the maximum and minimum value of the diameter shall not exceed 15% of the overall dig meters specified in Tables 4 to 7,

The bend test shall be carried out at ambient temperature in accordance with sub-clause 2 4.11 of HD 605, immediately after conditioning io a straight arrangement for at least 1h at 10 ± 3PC.

The mandrel diameter shall be 16 ID +■ dl ± 5%, D and d being respectively, the measured overall and conductor diameters.

After the bond test, the U-bent cable shall be immersed in water at ambient temperature, leaving above water a length of sample adequate for the test*

A voltage of 5 kV ax. or 15 kV d.c. shall ba applied for 10 mtn. on succession between each conductor and al other conductors connected together and to water. The test level «hail be attained by gradually increasing the voltage. No breakdown shall occur.

After the voltage test a piece of cable of about IflD in length ID being the measured overs! diameter in the middle of the sampled shall ba stripped carefully and the various component! shal be visually examined. Neither breaking of the conductor nor cracks of insulation or oversheath are allowed.

When tested In accordance with sub-clausa 2 5.3 of HD 605 the wires shall not show black spots unremovable by rubbing when examined with normal vision (black spot* placed at less than 10mm from wire end are not considered!. One stained wire out of seven rs tolerated.

When tested in accordance with subxlaose 3.2 1 of HD 605_e using a test voltage of 4 kV a.c or 12 kV de. for a duration of 15 min In the case of single core and 10 min in the cate of muhicore cables, the insulation shall not break down.

ki the case of multicore cables the test voltage shall ba applied in succession between each conductor and all other conductors connected together,

When a sample of core is tested in accordance with sub-clausa 3.3 1 of HD 605 the К value at 90’C «hall not be less than 3-67 M ohm.km.

The test on core shall be carried out after the voltage test specified in subclause 2 3 5 of this Section.

When complete cable tasted in accordance with sub-clause 3.33 ol HD 605 the К value at 120 ± 2^C shall not be less than 2200 M ohm,km.

The test on complete cable shall be carried out after the voltage test specified in sub-clause 2.3.5 of this Section.

The test shall be carried out in accordance with sub-clause 4.1.3 of HD 605 on pieces of cable as delivered.

The number of cable pieces shall be such as to give a total mass of non-metallic material of 10 kg/m.

The teat shall be considered satisfactory if the charred or affected portion does not reach a height exceeding 3.5m above the top edge of the furnace measured at the front and rear of the cable assembly.

3. Cables without me is Ik; covering

0.8Л kV

X3 Construction

3,3.1 Conductor

The conductors shall be of the material and type detailed m Tables 4 to 7 and shall comply with th* raquirementa of HD 383:

Class 2 for stranded conductors

Class 5 for flexible conductors

The resistance requirements are given in Tables 4 to 7.

3.3.2 insulation

The insulation shall be ethylene propylene rubber (EPRI compound, type G5, complying with the requirements given in Table 1 *

The insulation thickness shall comply with the values specified in Tables 4 to 7.

33.3 toner covering

The inner covering shall consist of an extruded layer of a non hygroscopic compound compatible with the operating temperature of the cable; alternatively, it may be replaced by a penetrating overs heath.

In the case of single core саЫе the inner covering is optional.

3.3.4 Ov&rsheath

The о ver sheath sha> consist of a polyvinyl chloride (PVC) compound, type Ra, complying with the requirements given in Table 2.

The о vershea ch thickness shal comply with the values specified in Tables 4 to 7.

3.4 Tests

Compliance with the requirements of clause 3.3 Shall be checked by inspection and by the tests specified in Table Эр

4. Cables with metallic covering

Not applicable

Table 1 * Requirements for the non-electrical teals for insulation