BS 7870-8.6:2003
$142.49
LV and MV polymeric insulated cables for use by distribution and generation utilities. Specification for multicore and multipair cables for installation above and below ground – Single wire or double steel tape armoured and non-halogenated sheathed multipair cable with copper conductors – Section 8.6 Single wire or double steel tape armoured and non-halogenated sheathed multipair cable with copper conductors
| Published By | Publication Date | Number of Pages |
| BSI | 2003 | 28 |
This section of BS 7870 specifies requirements for the construction, dimensions and mechanical and physical properties of multipair cables with halogen-free insulation and sheaths, having reduced fire propagation performance and low emission of smoke when affected by fire.
It specifies requirements for multipair cables (up to 200-pair) with copper conductors, a collective screen and armouring consisting of a single layer of steel wires or a double layer of steel tapes.
It specifies requirements for both Type 1 and Type 2 cables, which are defined as follows:
- Type 1: cable designed for the installation and operating conditions prevailing in a conventional fossil fuelled power station or equivalent location;
- Type 2: cable designed for the installation and operating conditions prevailing in a PWR power station, but excluding location in or around the containment area.
The requirements specified in this section of BS 7870 are applicable to both Type 1 and Type 2 cables unless otherwise indicated.
This section of BS 7870 is applicable to cables for use in and around power stations and other installations having similar cable densities.
NOTE A “guide to use” is given in Annex A.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | Committees responsible for this British Standard |
| 3 | Contents |
| 5 | 1 Scope 2 Normative references |
| 6 | 3 Rated voltage 4 Conductors 5 Insulation 6 Identification of cores 6.1 Cores |
| 7 | Table 1 – Colour codes 6.2 Pairs, quads and units |
| 8 | 7 Assembly of cores, fillers and binders 8 Rip cord 9 Collective screen 10 Bedding layer 11 Armouring 12 Oversheath |
| 9 | 13 Marking 13.1 External marking 13.2 Identification of year of manufacture 13.3 Mark of an approval organization |
| 10 | 13.4 Additional marking 14 Dimensions |
| 11 | Table 2 – Multipair cables (Type 1) Table 3 – Multipair cables (Type 2) |
| 12 | 15 Tests Table 4 – Schedule of tests |
| 13 | 16 Routine tests 16.1 General 16.2 Conductor resistance 16.3 Insulation resistance 16.4 Voltage test 16.5 Spark test on oversheath 16.6 Cable markings 16.7 Diameters over bedding and overall |
| 14 | 17 Sample tests 17.1 General 17.2 Conductor material and construction 17.3 Insulation 17.4 Capacitance unbalance 17.5 Identification 17.6 Laid-up cores 17.7 Rip cord 17.8 Collective screen |
| 15 | 17.9 Bedding layer 17.10 Armour wire Table 5 – Diameter of armour wire 17.11 Armour tape 17.12 Oversheath 17.13 Tests under fire conditions |
| 16 | 18 Type tests 18.1 General 18.2 Type approval Table 6 – Type approval tests 18.3 Mutual capacitance 18.4 Capacitance unbalance 18.5 Mutual inductance 18.6 Voltage test after bending |
| 17 | 18.7 Armour Table 7 – Mass of zinc coating 18.8 Insulation Table 8 – Requirements for non-electrical tests on polyethylene |
| 18 | Table 9 – Requirements for non-electrical tests on aromatic compound 18.9 Bedding 18.10 Oversheath |
| 19 | Table 10 – Requirements for non-electrical tests for non-halogenated bedding and oversheath |
| 21 | 18.11 Abrasion resistance 18.12 Special type tests on completed cable (Type 2 only) |
| 22 | Table 11 – Special type tests for Type 2 cables 18.13 Tests under fire conditions |
| 24 | Annex A (informative) Guide to use A.1 General A.2 Recommendations for selection A.2.1 Permissible application A.2.2 Maximum permissible voltage A.3 Recommendations for storage, transport and disposal A.3.1 Storage A.3.2 Transport A.3.3 Incineration of scrap cable A.3.4 Cable end sealing A.4 Recommendations for cable laying and installation A.4.1 General A.4.2 Environmental conditions |
| 25 | A.4.3 Pulling tensions A.4.4 Bending radii A.4.5 Cable installation |
