1. NOTE: These values relate to the cables in table 18.

  • Diameter of round wire armour

    • Nominal wire diameter

    • Wire diameter

    • Minimum

    • Maximum

    • mm

    • mm

    • mm

    • 0.9

    • 0.85

    • 0.95

    • 1.25

    • 1.18

    • 1.32

    • 1.6

    • 1.51

    • 1.69

    • 2.0

    • 1.90

    • 2.10

    • 2.5

    • 2.37

    • 2.63

    • 3.15

    • 2.99

    • 3.31

    • Mass of zinc coating

      • Nominal diameter of armour wire (in mm)

      • 0.9

      • 1.25

      • 1.6

      • 2.0

      • 2.5

      • 3.15

      • Minimum mass of zinc coating (in g/m2)

      • 112

      • 150

      • 172

      • 180

      • 195

      • 206

      • Compatibility test

        • Component

        • Test

        • Requirements

        • XLPE

        • HEPR

        • PVC Oversheath

        • Insulation

        • Minimum tensile strength (in N/mm2)

        • Minimum percentage elongation at break

        • Maximum percentage variation* of tensile strength

        • Maximum percentage variation* of elongation at break

        • 12.Б 200

        • 25 25

        • 8.5 200

        • 30 30

        • -

        • Oversheath

        • Minimum tensile strength (in N/mm2)

        • Minimum percentage elongation at break

        • Maximum percentage variation* of tensile strength

        • Maximum percentage variation* of elongation at break

        • 12.5 150

        • 25

        • 25

        • * The variation is the difference between the respective values obtained prior to and after heat treatment expressed as a percentage of the former.

      • APPENDIX

      • GUIDE TO USE

      • Contents

      1. Scope

      2. Object

      3. Recommendation for use

        1. Permissible application

        2. Highest permissible voltage

      4. Recommendations for storage and transport and disposal

        1. Storage

        2. Transport

        3. Disposal by incineration

        4. Cable end sealing

      5. Recommendations for cable laying and installation

        1. General

        2. Environmental conditions

        3. Pulling tensions

        4. Bending radii

        5. Cable installation

      6. Tests after installation

      1. Scope

      • This appendix covers the application of cables according to HD 604 Part 4, Section E.

      1. Object

      • The object of this document is to provide recommendations for the selection, storage, disposal, transportation and installation of the cables specified under Clause 1. The information given in this Appendix is for guidance only. It does not take precedence over any relevant national regulations or statutory requirements.

      1. Recommendations for use

        1. Permissible application

      • These cables may be installed indoors and outdoors for fixed installations on walls and metallic structures. These cables shall not be installed where the emission of corrosive fumes and excessive smoke in the event of a fire are forbidden.

      1. Maximum permissible voltage

      • These cables may be used on Category А, В & C of IEC 183.

      1. Recommendations for storage, transport and disposal

        1. Storage

      • Cable drums should be regularly inspected to assess their physical condition.

      • Battens, when supplied, should not be removed until a cable is required for installations.

      1. Transport

      • Cable drums having a flange diameter exceeding 1 m and weighing more than 250kg gross shall be transported in an upright condition. The drums should be protected against movement. Loading and unloading shall be facilitated by suitable devices to avoid damage to both cable and drum. When moving drums, due regard must be paid to the weight, method and direction of rolling, protruding nails and wood splinters.

      1. Disposal by incineration

      • Small quantities of timber or battens which may have been treated with wood preservatives may be burnt under carefully controlled conditions in the open. Cables shall only be incinerated under the supervision of a licensed contractor.

      1. Cable end sealing

      • Both ends of every length of cable shall be sealed in such a manner as to include the oversheath and to inhibit the ingress of moisture during storage, delivery and up to the time of jointing.

      1. Recommendations for cable laving and installation

        1. General

      • The choice of cable shall take into account the cable route, method of laying and service conditions. The latter shall include:

      1. The adjacency of other cables and their mutual heating effect; the specific earth resistivity, protection against solar radiation; the earth loop impedance; the capability of the cable to withstand the worst anticipated fault conditions of the system.

      2. The leakage of stray currents and attack from solvent substances.

      3. Soil subsidence and other forms of violent vibrations.

      4. Protection against mechanical damage during and after installation.

      5. When cable are laid in ducts, the correct size of duct shall be used to avoid damage during

      • installation and overheating.

      1. Where cables are laid in surface troughs, there shall be adequate ventilation which, however, will not permit the entry of debris.

      2. The cable support system should be designed to avoid damage or danger under normal fault conditions.

      1. Environmental conditions

      1. The lowest recommended temperatures for installation shall be 0°C but care should be taken to ensure that the cable temperature has been above 0°C for the preceding 24 hours.

      2. Loaded cables, especially single core cables, may have surface temperatures which require protection against accidental contact.

      1. Pulling tensions

      • The maximum pulling load shall not exceed the following values:

      • For copper conductors 50 N/mm2 of CSA

      • For aluminium conductors 30 N/mm2 of CSA

      • CSA refers only to the conductor(s).

      • Where long lengths of cable are to be pulled along difficult routes, where tension increases sharply due to bends, cognizance shall be taken of the values for maximum side wall pressure (Tension divided by Bending Radius) recommended by the supplier.

      1. Bendina radii

      • During installation, no cable shall be bent to a smaller radius than those listed below:

      1. Armoured circular copper conductor 6 x D

      2. All other cables

      • where D = Tabulated overall diameter.

      1. Cable installation

      1. There shall be a significant measure of compatibility between the way in which cables are installed for the test for fire propagation and the actual installations.

      2. There shall be compatibility between all jointing materials and components of the cable.

      • (c> All bonds for earthing shall have adequate conductance, be as short and as straight as

      • possible and be protected against corrosion, especially where dissimilar metals are involved.

      1. Tests after installation

      • These are not mandatory, but when required shall consist of:-

      1. D.C. test on cables

      • The test voltage, given in table A.1 should be increased gradually to the full value and maintained continuously for 15 minutes. The test should be made between conductors and between each conductor and metallic covering. No breakdown should occur. Repeated d.c. voltage tests may damage the insulation.

      • Table A.1 : Test voltage after installation

      1. 2 3

      • Cable voltage

      • D.C. test voltage

      • Between

      • Between each conductor

      • Conductors

      • and metallic covering

      • V

      • V

      • V

      • 600/1000

      • 3500

      • 3500

      • 1900/3300

      • 10000

      • 7000

      1. Test on oversheath