NOTE: These values relate to the cables in table 18.
Diameter of round wire armour
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Mass of zinc coating
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Compatibility test
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APPENDIX
GUIDE TO USE
Contents
Scope
Object
Recommendation for use
Permissible application
Highest permissible voltage
Recommendations for storage and transport and disposal
Storage
Transport
Disposal by incineration
Cable end sealing
Recommendations for cable laying and installation
General
Environmental conditions
Pulling tensions
Bending radii
Cable installation
Tests after installation
Scope
This appendix covers the application of cables according to HD 604 Part 4, Section E.
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.
Recommendations for use
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.
Maximum permissible voltage
These cables may be used on Category А, В & C of IEC 183.
Recommendations for storage, transport and disposal
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.
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.
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.
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.
Recommendations for cable laving and installation
General
The choice of cable shall take into account the cable route, method of laying and service conditions. The latter shall include:
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.
The leakage of stray currents and attack from solvent substances.
Soil subsidence and other forms of violent vibrations.
Protection against mechanical damage during and after installation.
When cable are laid in ducts, the correct size of duct shall be used to avoid damage during
installation and overheating.
Where cables are laid in surface troughs, there shall be adequate ventilation which, however, will not permit the entry of debris.
The cable support system should be designed to avoid damage or danger under normal fault conditions.
Environmental conditions
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.
Loaded cables, especially single core cables, may have surface temperatures which require protection against accidental contact.
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.
Bendina radii
During installation, no cable shall be bent to a smaller radius than those listed below:
Armoured circular copper conductor 6 x D
All other cables
where D = Tabulated overall diameter.
Cable installation
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.
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.
Tests after installation
These are not mandatory, but when required shall consist of:-
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
2 3
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Test on oversheath
Where an outer conductive layer is applied to the oversheath, a d.c. voltage of 3kV shall be applied between the underlying armour and the outer conductive layer for one minute. No breakdown should occur.'BLANK PAGE'
SECTION A : CABLES WITH COPPER OR ALUMINIUM CONDUCTORS
WITH OR WITHOUT METALLIC COVERING OR SCREEN
Replace pages 5-А-11. 5-A-12, 5-A-15, 5-A-18, 5-A-19, 5-A-20, 5-A-21. 5-A-22, 5-A-26 and 5-A-29 by the following:'BLANK PAGE'
Table 1 - Requirements for the non-eiectrical tests for non halogenated insulating compounds
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Table 1 (concluded)
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Variation: difference between the median value after ageing and the median value without ageing, expressed as a percentage of the latter.
To, T14 T42 (Ao A14 A42) represent the tensile strength (elongation at break) as delivered and after 14-day and 42-day ageing, respectively.
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Variation: difference between the median value after ageing and the median value without ageing, expressed as a percentage of the latter.
To, T14 T42 (Ao A14 A42) represent the tensile strength (elongation at break) as delivered and after 14-day and 42-day ageing, respectively.
See test method referred to in columns 6 and 7.
Table 2 (continued)
*
Table 2 (concluded)
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See test method referred to in columns 6 and 7.Table 3 - Requirements for the tests related to fire conditions for non-metallic materials
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Table 4 - Schedule of tests for cables without metallic covering
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Clause numbers refer to this section unless otherwise stated.Page 5-A-19
HD 604 S1:1994/A1:1997
Part 5 Section A
Table 4 (concluded)
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Clause numbers refer to this section unless otherwise stated.Table 5 • Schedule of tests for cables with metallic screen (Protected against electromagnetic disturbances)
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Clause numbers refer to this section unless otherwise stated.
Table 5 - (continued)
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Clause numbers refer to this section unless otherwise stated.Page 5-A-22
HD 604 S1:1994/A1:1997
Part 5 Section A
Table 5 - (concluded!
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Clause numbers refer to this section unless otherwise stated.Table 11 - Conductor data of cables with metallic screen
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* Control cable
Table 12 - Insulation thickness of cables with metallic screen
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* Control cable
Table 13 - Inner sheath and oversheath thickness of cables with metallic screen