BS 7870-8.5:2003
$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 armoured and unarmoured multicore cables with copper conductors and non-halogenated sheath – Section 8.5 Single wire armoured and unarmoured multicore cables with copper conductors and non-halogenated sheath
| 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 multicore cables with thermosetting insulation and non-halogenated sheaths, having reduced fire propagation performance, and low emission of smoke when affected by fire.
It specifies requirements for:
- steel wire armoured multicore cables (2-core to 48-core) having copper conductors;
- unarmoured multicore cables (2-core to 48-core) having copper conductors.
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 Voltage designation 4 Conductors 5 Insulation 6 Identification of cores 7 Assembly of cores, fillers and binders 8 Bedding layer (optional for unarmoured cables) |
| 7 | 9 Armouring 10 Oversheath 11 Marking 11.1 External marking 11.2 Identification of year of manufacture |
| 8 | 11.3 Mark of an approval organization 11.4 Additional marking 12 Dimensions |
| 9 | Table 1 – Construction of 1.5 mm Table 2 – Construction of 2.5 mm Table 3 – Construction of 4 mm |
| 10 | Table 4 – Construction of 1.5 mm Table 5 – Construction of 2.5 mm Table 6 – Construction of 4 mm |
| 11 | Table 7 – Construction of 2.5 mm Table 8 – Construction of 2.5 mm |
| 12 | 13 Tests Table 9 – Schedule of tests |
| 13 | 14 Routine tests 14.1 General 14.2 Conductor resistance 14.3 Insulation resistance (Type 2 only) 14.4 Voltage test 14.5 Spark test on oversheath 14.6 Cable markings 15 Sample tests 15.1 General 15.2 Conductor material and construction 15.3 Insulation 15.4 Core identification |
| 14 | 15.5 Laid-up cores 15.6 Bedding layer 15.7 Armour wire Table 10 – Diameter of armour wire 15.8 Oversheath 15.9 Tests under fire conditions |
| 15 | 16 Type tests 16.1 General 16.2 Insulation |
| 16 | Table 11 – Requirements for non-electrical tests for thermosetting insulation |
| 17 | 16.3 Star capacitance 16.4 Bedding |
| 18 | Table 12 – Requirements for non-electrical tests for non-halogenated bedding and oversheath |
| 21 | 16.5 Mass of zinc coating of galvanized steel armour wires Table 13 – Mass of zinc coating 16.6 Wrapping test for galvanized steel armour wires 16.7 Oversheath 16.8 Compatibility test (Type 1 only) Table 14 – Requirements for compatibility of insulation and oversheath 16.9 Abrasion resistance |
| 22 | 16.10 Special type tests (Type 2 only) Table 15 – Special type test for Type 2 cables 16.11 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 Environment conditions |
| 25 | A.4.3 Pulling tensions A.4.4 Bending radii A.4.5 Cable installation |
