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BS 7870-8.4:2003

BS 7870-8.4:2003

$102.76

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 PVC sheathed multipair cable with copper conductors, having reduced fire propagation performance – Section 8.4 Single wire or double steel tape armoured and PVC sheathed multipair cable with copper conductors, having reduced fire propagation performance

Published By Publication Date Number of Pages
BSI 2003 22
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This section of BS 7870 specifies requirements for the construction, dimensions and mechanical and physical properties of multipair PVC insulated and PVC sheathed cables having reduced fire propagation performance conforming to BS EN 50265-2-1 and BS EN ISO 4589-3.

It specifies requirements for:

  1. multipair cables (2 pairs to 200 pairs) having copper conductors, a collective screen and armouring consisting of a single layer of steel wires;
  2. multipair cables (20 pairs to 200 pairs) having copper conductors, a collective screen and armouring consisting of a double layer of steel tapes.

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
3 Rated voltage
6 4 Conductors
5 Insulation
6 Identification of cores
6.1 Cores
Table 1 – Colour codes
7 6.2 Pairs, quads and units
7 Assembly of cores, fillers and binders
8 Rip cord
9 Collective screen
10 Bedding layer
8 11 Armouring
12 Oversheath
13 Marking
13.1 External marking
9 13.2 Identification of year of manufacture
13.3 Mark of an approval organization
13.4 Additional marking
14 Dimensions
10 Table 2 – Multipair cables
11 15 Tests
Table 3 – Schedule of tests
12 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
17 Sample tests
17.1 General
17.2 Conductor material and construction
17.3 Insulation
13 17.4 Capacitance unbalance
17.5 Identification
17.6 Laid-up cores
17.7 Rip cord
17.8 Collective screen
17.9 Bedding layer
17.10 Armour wire
Table 4 – Diameter of armour wire
14 17.11 Armour tape
17.12 Oversheath
17.13 Tests under fire conditions
18 Type tests
18.1 General
18.2 Type approval
Table 5 – Type approval tests
15 18.3 Mutual capacitance
18.4 Capacitance unbalance
18.5 Mutual inductance
18.6 Voltage test after bending
18.7 Armour
Table 6 – Mass of zinc coating
16 18.8 Insulation
Table 7 – Requirements for non-electrical tests for polyvinyl chloride
18.9 Bedding
18.10 Oversheath
17 18.11 Tests under fire conditions
18 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
19 A.4.3 Pulling tensions
A.4.4 Bending radii
A.4.5 Cable installation

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BS 7870-8.4:2003
$102.76