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’ (*) Clause numbers refer to this section unless stated otherwise.SECTION C : CABLES WITH COPPER OR ALUMINIUM CONDUCTORS :
UNARMOURED, ARMOURED OR DOUBLE SCREENED

Replace pages 5-C-6, 5-C-7, 5-C-8, 5-C-9, 5-C-10, 5-C-11, 5-C-12,5-C-14,5-C-18,5-C-19, 5-C-20, 5-C-25, 5-C-26 and 5-C-31 by the following:'BLANK PAGE'

The mean overall dimensions of the cables, if specified, shall be within the limits given in the tables in the particular specifications.

The difference between any two values of the overall diameter of the cables at the same cross-section (ovalityl shall not exceed 1 mm + 10% of the nominal diameter or of the upper limit specified for the mean overall diameter.

Compliance shall be checked by the tests given in sub-clause 2.1.3.1 and 2.1.3.2 of HD 605.

All cables shall comply with the test specified in HD 405.3 Category C.

When a sample of the complete cable is tested in accordance with HD606 Parts 1 and 2 the light transmittance shall exceed the following values throughout the test:

1. cable 70%

2. cables 60%

3. cables 60%

N cables 50%

2.4.4.3 Test for acidity of combustion oases

See Table I, Ref. No. 12.

2.4.5 Abrasion Test

When a sample of the complete cable is tested in accordance with HD 605 sub-clause 2.4.5, the sheath or oversheath shall be deemed to be satisfactory provided that, following the test, examination of sample without magnification reveals no cracks or splits in the internal and external surfaces.

3. Cables without metallic layers :

Cross linked polyethylene insulated and non-halooenated sheathed cable

(under consideration by TC20)

YMz^mbzh

0.6/1 kV

Number of conductors 1, 2, 3, 4 or 5 and for the cross-sections 1.5 and 2.5 mm² up to and including 61. Conductors of three and four core cables with a cross-sectional area of 35mm² and above may be circular or shaped.

Conductors shall comply with the requirements of HD 383. For each size of cable the class of conductor is given in Tables III or IV.

A separator of suitable material may be applied around each conductor. If required, tapes may be applied to comply with fire resistant requirements.

The insulation shall be XLPE compound complying with the non-electrical requirements given in Table I.

The insulation thickness shall comply with the value specified in Tables III or IV.

The cores shall be twisted together. For an assembly of cores consisting of 2 or more layers, the direction of lay shall alternate for each successive layer.

The twisted cores shall be covered by an extruded inner covering consisting of an unvulcanised rubber or plastic compound. For cables with shaped conductors and cables with more than five cores, the extruded inner covering may be replaced by a non-hygroscopic tape wrapping.

It shall be possible to separate the cores easily.

The sheath shall be non-halogenated compound of Type ZHI /STcomplying with the non-electrical requirements given in Table I. The sheaths shall be applied around the inner covering or tape wrapping. It shall fit closely on the inner covering.

The sheath thickness for cables with a number of cores not exceeding five shall comply with the specified value given in Tables III or IV.

For cables with more than five cores, the specified value for thickness of the sheath is 1,8mm for cables with a number of cores up to and including 40 and 2.1 mm for cables with more than 40 cores.

For cables with a number of cores not exceeding five and with a circular solid or circular stranded non-compacted conductors, the mean overall diameter shall be within the limits given in Table III. For other cables no limits for the mean overall diameter are prescribed.

Compliance with the requirements of sub-clause 3.3 and the appropriate requirements of Part 1 shall be checked by inspection and by the tests specified in Table 11-А.

3. Cables with metallic layers

   1. Armoured cables: Cross linked polyethylene insulated and non-haloaenated sheathed cable with combined armour/protective earth conductor

      1. Code designation (Provisional)

(Under consideration by TC20)

ZjO-YMzTKasmbzh for cables with a braided armour/protective earth conductor.

Z,G-YMz,Kasmbzh for cables with a helically applied armour/protective earth conductor.

0.6/1 kV

Number of conductors 1,2, 3, 4 or 5 and for the cross-sections 1.5 and 2.5 mm² up to and including 61. Conductors of three and four core cables with a cross-sectional area of 35mm² and above may be circular or shaped. Conductorsshall comply with the requirements of HD 383. For each size of cable the class of conductor is given in Tables V and VI.

A separator of suitable material may be applied around each conductor. If required, tapes may be applied to comply with fire resistant requirements.

The insulation shall be XLPE compound complying with the non-electrical requirements given in Table 1. The insulation thickness shall comply with the value specified in Tables V and VI.

The cores of multicore cables shall be twisted together. For an assembly of cores consisting of 2 or more layers, the direction of lay shall alternate for each successive layer.

The twisted cores shall be covered by an extruded inner covering consisting of unvulcanised rubber or plastic compound. For cables with shaped conductors and cables with more than five cores the extruded inner covering may be replaced by a non-hygroscopic tape wrapping.

It shall be possible to separate the cores easily.

The inner sheath shall be non-halogenated compound of Type ZH^ST complying with the non-electrical requirements given in Table 1. The sheath shall be applied around the inner covering or tape wrapping. It shall fit closely on the inner covering.

The inner sheath thickness for cables with a number of cores not exceeding five shall comply with the specifies value given in Tables V or VI.

For cables with more than five cores the specified value for thickness of the inner sheath is 0.8mm.

The armour/PE conductor shall be applied around the inner sheath as a braid or in a helical form.

The armour/PE conductor shall comply with the following requirements.

4.1.3.7.1 Composition

The armour/PE conductor shall consist of:

• a braid of galvanised steel wires or plain or tinned copper wires with a continuous braided flat conductor of tinned copper wires underneath, or

• an assembly of round or flat galvanised steel and plain or tinned copper wires, surrounded by a counterhelix of galvanised steel tape or plain or tinned copper tape, or

• an assembly of round or flat, plain or tinned, copper wires surrounded by a counterhelix of plain or tinned copper tape.

The armour/PE conductor may be covered by a separator of non- hygroscopic material.

The thickness of the elements shall not be less than the specified value for each type and size of cable shown in Tables V, VI and VII as appropriate.

The connection of the armour/PE conductor, other than a complete copper armour, to earth shall be possible by means of one or more continuous copper conductors in contact with or forming part of the armour/PE conductor.

The cross-sectional area of the braided conductor or of each of the latter copper conductors shall be at least 1mm² and the total cross-sectional area shall not be less than 60%, with a minimum of 1,5mm², of the nominal copper equivalent cross-sectional area of the armour/PE conductor which is specified in Tables V, VI and VII as appropriate; the electrical resistance however being the criterion

.

The surface of the inner sheath shall be covered by the armour/PE conductor for at least 80% and the gap between the elements shall not exceed 2mm.

Compliance with the above specified requirements shall be checked by inspection and measurement. For the percentage of coverage of a braided armour/PE conductor the calculation method is given in sub-clause 2.1.7 of HD 605.

The electrical resistance of the combined armour/PE conductor shall not exceed the specified value for each type and size of cable shown in the Table V, VI and VII as appropriate.

Additionally, the resistance of the armour/PE conductor measured on a length of 20m with the current source at one side connected to 5% of the number of elements of the braided armour or 2 adjacent steel wires of the helically applied armour shall not exceed 2,5% of the specified maximum value per km.

Compliance shall be checked by the test given in sub­clause 3.1.3.1 and 3.1.3.2 respectively of HD 605.

There shall be no harmful interactions between the armour/PE conductor and the inner sheath or oversheath. Inspection after the test given in HD 505.1.2, Sub-clause 8.1.4 shall show no impairment of the armour/PE conductor.

The following ageing conductions apply:

• temperature : (100 ± 2)°С

• duration : 7 x 24h

S

4.1.3.8

4.1.3.9

eparator

The separator, if any, shall consist of a plastic tape or an equivalent layer around the armour/PE conductor.

Oversheath

The oversheath shall be non-halogenated compound of Type ZH,/ST complying with the non-electrical requirements given in Table I. The oversheath shall be applied around the armour/PE conductor, or a tape, if any.

The thickness of the oversheath for cables with a number of cores not exceeding five, shall comply with the specified value given in Tables V or VI.

For cables with more than five cores the specified value for the thickness of the oversheath is 1,8mm for cables with a number of cores up to and including 40 and 2.1 mm for cables with more than 40 cores.

For cables with an armour/PE conductor no limits for the mean overall diameter are prescribed.

Cables shall be marked continuously with the letters mbzh in compliance with 3.1 item 2c).

4.1.4 Tests

Compliance with the requirements of sub-clause 4.1.3 and the appropriate requirements of Part 1 shall be checked by inspection and by the tests specified in Table ll-A.

4.2 Screened cables: Double screened, cross linked polyethylene insulated and non-halogenated sheathed cable

(Under consideration by TC20)

YMz^afasmbzh for single core cables

Z^YMz^afasmbzh for multicore cables

0.6/1 kV

Number of copper conductors 1, 3 or 5

The conductors shall comply with the requirements of HD 383. For each size of cable the class of conductor is given in Table VIII.

A separator of suitable material may be applied around each conductor. If required, tapes may be applied to comply with fire resistant requirements.

The insulation shall be XLPE compound complying with the non-electrical requirements given in Table I. The insulation thickness shall comply with the value specified in Table VIII.

The core of the single core cable shall be coloured green/yellow. For three and five core cables the core with the largest cross-sectional area shall be coloured green/yellow.

The cores of multicore cables shall be twisted together. A centre filler may be used.

The twisted cores shall be covered by an extruded inner covering consisting of unvulcanised rubber or plastic compound. It shall be possible to separate the cores easily.

The sheath shall be non-halogenated compound of Type ZH,/ST complying with the non-electrical requirements given in Table I.

The sheath shall be applied around the inner covering.

It shall fit closely on the inner covering. The sheath thickness shall comply with the specified values given in Table VIII.

4.2.3.8.1 Composition

The screen shall be composed as follows:

• a symmetrical galvanised steel wire braid;

• a separator of non-hygroscopic material e.g. a tape or an extruded layer;

• a symmetrical plain or tinned copper wire braid.

The screen shall be applied around the insulation of single-core cables and around the inner sheath of multicore cables.

The screen may be covered by a separator of non- hygroscopic material.

4.2.3.8.2 Diameter of the wires

The nominal diameter of the wires of the braid shall not be less than the specified value for each size of cable shown in Table VIII.

However, each value measured shall not be less than 90% of the nominal value plus 0.03mm nor be more than 110% of the nominal value plus 0.03mm.

4.2.4 Tests

Compliance with the requirements of sub-clause 4.2.3 and the appropriate requirements of Part 1 shall be checked by inspection and by the tests specified in Table ll-B.

Table I - Requirements for the non-electrical test for cross-linked polyethylene
insulation and non-halogenated sheath