---

25mrrP and 35mm^J conductors may be round as alternative»

5. - ГУС insulation thickness

Table 7 - Thickness of extruded inner covering

Table 6 * Cross-section of concentric conductor

Table 9 - Deciricel resistance at 2 CPC ol concentric conductors o1 crow * sections not specified In HD 383

APPENDIX

GUIDE TO USE

1. SCfiQl

Thia 'Guide to Um' it applicable to cables according to Section D of Part 3 of HD604.

2. Qhk£i

The object of this 'Guide to Um’ is to provide recornmend a tio ns for the selection, storage, transportation and Im tala ton of the cables specified In Sect юл D of Pert 3 of HD604.

NOTE; Safety regulations are not covered in this guide as they are covered by the relevant national regulations and laws.

3. RBcommendatiom for use

   1. РагппміЫе frooiicanofis

The cables may be instaked indoors and outdoors and may be hid in the ground and in water.

The rated voltage of the cable, expressed as Uo/V, is O.BHkV.

Uo is the rms value between any insulated conductor and 'earth' I metal covering of ^th* cable or the surrounding medium).

U « the rm a value between any two phase conductors of a multi core cable or of a system of single core cables»

In an alternating current system, ihe nominal voltage of the system shal ba not higher than the rated voltage o< the cable. This condition applies both to the value Uo and to the value U.

In a direct current system, the nominal voltage of the system shall be not higher than 1,5 times the rated voltage of the cable.

NOTE: The operating voltage of a system may permanently exceed the nominal voltage of such a system by 10%. A cable can be used st a 10% higher operating voltage than Its rated voltage If the latter is ar least equal to the nominal voltage of the system,

The concentric conductor may be used as neutral, PE-conductor, PEN-conductor or at a screen.

4. Recommendations for storage and transport

   1. Delivery

When delivered on a drum the core diameter of the drum she! not be less than:

■ 16 times the outer diameter of the cable for mufti tore cable»;- 20 time6 the outer diameter of the cable for single core cable*.

The distance between the outer cable layer and the head of the dnan flange shall be sufficiently high to avoid damage to the cable.

Short cable lengths may be coiled to rings and transported and stored horizontaNy. The bending radii shall not be less than the values given in clausa 5.4 below-

The cable ends shall be sealed waterproof during transport, storage and laying.

For the transport of filed up cable reels arty suitable earners «hat be used.

Cable drums with a total weight exceeding 2.5 tons have to be transported with the drum*axis In horizontal position. The drums have to be protected against movement. Loading and unloading shal be made by suitable devices to avoid damages of the cablet and of the cable- drums.

Filed-up cable-drums shall be rolled only short distances over plain solid ground in the direction indicated. The cable ends have to ba tightened.

The cable route. the laying method and the service conditions shall be taken into account when selecting the type of cable.

The service conditions like cable concentrations, externa) heat solar radiation, heat resistance of soil, etc.;

Vibrations and movements of soil;

Protection against other outer influences like chemical solvents;

Stray currents and corrosion;

Method of laying and choice of bedding material.

512 Cables shall be protected against mechanical damages that may occur after mstelation. For cables laid in ground local regulations for laying depth and external protection shah be followed.

Inner diameters of ducts and pipes shall be chosen wide enough (1.5-2 times cable diameter) to allow for free movement and replacement of the cable(a)

.

If single core cables of a three-phase system are installed in steel pipes or through steel constructions, all cables belonging to the same system have to pass through the same pipe or hole.

ere limited.

Lowest t£

апка tamable lavtna

Insulation and sheath of PVC is liable to cracking at low temperatures in case of strokes against the сеЫе or excessive banding. Care should therefore be Uken during transport laying and insteVatkxi-

Lowest temperature of cable

0°C under normal conditions of care

-10°C with special care in handing to avoid єру strokes against the cable and with onty moderate banding radius

These temperatures are valid for the cable itself and not for the environment. If possible the temperature of the cable shall be raised to at least + 1Q°C before laying, e.g. in a heated buildkig, to facilitate handling and to reduce the risk for damages,

5,3 Pollina loads

It is assumed that the cable route is wad designed for the laying procedure with well established curves and a sufficient number of саЫе rolers. Special attention shall be paid to the required minimum bending rods (see dause 5.4). The pulling forces shall be permanentty supervised during the puN-in procedure.

The following pulUng loads shall not be exceeded;

(a) Pulling in the conductors of ths cable

P = 50x $ N (Copper conductors)

P = 30 x S hl (Aluminium conductors!

where S ia the total cross■ section in mm’ of the conductors (concentric conductor cot ki eluded)

(bl Pi4kng grip around the cable oversheaih

P - 5 x D* N

where D is the outer diameter of the cable in mm

5 4 Bendina radius

During installation the bending radius shall not fall below the following values;

15 times the cable diameter for single core cables

12 times the саЫе diameter for multi-core cables

In СШ of single time bending ■ for example n front of a terminal ’ rt is permitted to reduce die bending radius to:

10 tunes the cable diemew for single core cabtea

6 times the cable diameter for multi-core cables

provided the work is made by skilled personnel, e g. the cable Ie warmed up to 30*0 and the cable is bent by means of a template«СЛОМ Е CABLES WITH COPPER OB ALUMMUM CONDUCTORS AND
Wffi ОТ ST»? ARMOUR

CONTENTS

PAGE

V Scope 3-E-2

2. Additional general requirements

   1. Identification of cores 3 E-2

   2. Thickness of inner sheath 3-E-2

   3. Cable marking 3-Е-Э

   4. Additional test requirements 3-E-4

3. I Not аорІсаЫе) ЗЕ 6

4. Cables with metallic covering

4*1 Code designation 3-E-6

4*2 Rated vohage 3-E-6

4.3 Construction З-Е-в

44 Tests 3-E-9

Tables: 1 * 23 3-E-10

Appendix: Gu*de to use 3-E-36

■m■f'•■■•■**•*♦» r

REFERENCES

References ace made, in this Section E of Part 3 of HD 604_r to other Parts of thia HD and to other Harmonisation Documents end International Standards as follows:

HD 393 Conductors of insulated cables (Endorsing IEC 226 and 22&A)

HD 405 Tests on electric cables under fire conditions

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

HD 605 Electric cables : Additional test methods lEC 183 Guide to the selection of high voltage cables

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

SECTK)N_E

Г SGQftfi

ТЫз lection specifies requirements for and dimansiofis of single core and mutii-core PVC insulated and sheathed cables having reduced fire propagation performance.

The maximum continuous conductor temperature shall not exceed 70°C. The maximum temperature for short-circuit condition is 160*C tor conductor sixes up to and including 300mm* and 140°C tor larger conductor sizes.

This section covers the following classes of cable:

10 2,3 and 4 core cables having copper conductor end steal wire armour;

№ 2,3 and 4 core cables having solid aluminium conductors and aluminium wire or strip armour;

tiii] Single core cables having copper conductor and aluminium wire armour;

{iv) Single core cables having solid or sectoral aluminium conductors and aluminium wire or strip armour:

(v) Muftrcore auxiliary cables having 2 up to 49 cores with copper conductors and steel wire armour.

2. Additional general reoufrements

The folowing general requirements shall be read in conjunction with those given in Part к

2d tdemiticatipn of cores

The cores of all cables shall be identified either by numbers or by colours in accordance with the following sequence.

Number of cores wntrficabon

R

One

Two

Three Four Auxiliary cables

ed or black

Red, black

Red, yeftow. blue

Red, yellow, blue, black

1, 2, 3. 4_r 5, 6, 7 and upwards

The height of individual numbers shall be not less than 1 ,5mm and the interval between adjacent numbers shaU net exceed 70mm.

The thickness of lapped beddings need not be checked by measurement

The method of cable marking shall comply with clause 3 of Рмі 1 end the following additional requirements!»

The external turface of ail cables shall be tegibiy marked with the foftowing e toman tt of marking:-

tlfifnftOl Example of marking

11 Electric cable ELECTRIC CABLE

2) Voltage designation 600/1000 V

600/1000V AUX

31 Standard number HD 604-3-E

41 Manufacturers XYZ

identification

51 Number of cores, type and nominal area of conductor