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HD 604 SI :1994/A1:1997

Part 4 Section D

SECTION E: CABLES WITH COPPER OR ALUMINIUM CONDUCTORS
AND WIRE OR STRIP ARMOUR

Replace the complete Section by the following:'BLANK PAGE'

SECTION E: CABLES WITH COPPER OR ALUMINIUM CONDUCTORS.
AND WIRE OR STRIP ARMOUR

CONTENTS

Page

1. Scope 4-E-2

2. Additional general requirements

   1. Identification of cores 4-E-2

   2. Thickness of inner sheath 4-E-2

   3. Cable marking 4-E-2

   4. Additional test requirements 4-E-4

3. (Not applicable) 4-E-6

4. Cables with metallic covering

   1. Code designation 4-E-6

   2. Rated voltage 4-E-6

   3. Construction 4-E-7

   4. Tests 4-E-9

Tables: 1-30 4-E-10

Appendix: Guide to use 4-E-42

REFERENCES

Section E of Part 4 of HD 604 incorporates by dated or undated reference, provisions from other publications. These references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to Section E of Part 4 of HD 604 only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies.

EN 60811 Common test methods for insulating and sheathing materials of electric cables

HD 383 Conductors of insulated cables (Endorsing IEC 228 and 228A)

HD 405 Tests on electric cables under fire conditions

HD 605 Electric cables : Additional test methods

IEC 183 Guide to the selection of high voltage cables

SECTION E

1. . Scope

This section specifies requirements for and dimensions of single core and multi-core XLPE or HEPR insulated and PVC sheathed cables having reduced fire propagation performance.

The cables considered are intended for use where the combination of ambient temperature and temperature rise due to loading current results in a conductor temperature not exceeding 90°C. The maximum temperature for short-circuit conditions is 250°C.

This section covers the following classes of cable:

1. 2, 3, 4 and 5 core cables having copper conductor and steel wire armour

2. 2, 3 and 4 core cables having solid aluminium conductors and aluminium wire or strip armour

3. Single core cables having stranded copper or aluminium conductor and aluminium wire armour

4. Single core cables having solid or sectoral aluminium conductors and aluminium wire or strip armour.

5. Multicore auxiliary cables having 2 up to 48 cores with copper conductors and steel wire armour

An informative guide to use is given in the appendix of this section.

2. Additional general requirements

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

T

following sequence:

Number of cores

One Two Three Four Five Auxiliary cables

he cores of all cables shall be identified either by numbers or by colours in accordance with the

Identification

Red or black

Red, black

Red, yellow, blue

Red, yellow, blue, black

Red, yellow, blue, black, green/yellow

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

The height of individual numbers shall be not less than 1.5mm and the interval between adjacent numbers shall not exceed 70mm.

The minimum thickness of extruded inner covering shall not be less than the specified value for each type and size of cable shown in the tables by an amount more than 15% + 0.1 mm. Compliance shall be checked by the test given in clause 2.1.2 of HD 605.

The external surface of all cables shall be legibly marked with the following elements of marking:-

5. Number of cores, type and nominal area of conductor

1. Copper conductor cables: 1x400

(Note: 1 x400 shall indicate a single-core cable with 400mm² copper conductor)

2. Aluminium conductor cables: 1x400AL

(Note: 1x400 AL shall indicate a single-core cable with 400mm² aluminium conductor)

3. Copper conductor cables with reduced neutral: 3 x 50/25

(Note: 3 x 50/25 shall indicate a 4-core cable with three 50mm² copper phase conductors and one 25mm² copper neutral conductor).

The marking of the Elements 1-4 shall be by embossing or indenting on the oversheath.

For cables with tabulated approximate overall diameters above 15mm, Elements 1, 2 and 3 shall appear, in any sequence that neither confuses nor conflicts, on two or more primary lines along the axis of the cable, approximately equally spaced around the circumference of the cable. Elements 4 and 5 shall appear on at least one line, which may be one of the primary lines, or a secondary line or lines. They may appear in any sequence that neither confuses nor conflicts, and need not all be on the same line.

For cables with tabulated approximate overall diameters of 15mm or smaller, the Elements shall be disposed as for cables above 15mm except that the marking for Elements 1, 2 and 3 shall appear on one or more primary lines.

The letters and figures shall consist of upright block characters. The characters shall have a minimum height of 3mm.

The distance between the end of one element of marking and the beginning of the next identical element of marking shall not be greater than 550mm, for Elements 1, 2 and 3, and not greater than 1100mm for Elements 4 and 5.

Compliance shall be checked by visual examination and measurement.

A means of identifying the year of manufacture of the cable shall be provided throughout the length of the cable, either internally or by marking on the surface of the cable.If the identification is internal the distance between the end of the mark and the beginning of the next mark shall not be greater than 550mm. As an alternative internal marking, an identification thread may be used.

If the identification is by marking on the surface it shall comply with the requirements given for Elements 4 and 5 in sub-clause 2.3.1 in respect of maximum distance between marks.

If the mark of an Approval Organisation is used it shall be provided throughout the length of the cable.