Electric cables. Armoured cables with thermosetting insulation for rated voltages from 3.8/6.6 kV to 19/33 kV having low emission of smoke and corrosive gases when affected by fire. Requirements and test methods

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Hardcopy , PDF

Language(s)

English

Published date

29-08-2008

Publisher

British Standards Institution

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Voltage designation
5 Non-metallic materials
6 Conductors
7 Conductor screen
8 Insulation
9 Insulation screen
10 Assembly of three-core cables, including inner coverings
   and fillers
11 Metallic layer
12 Metallic armour
13 Oversheath
14 Marking
15 End sealing
16 Schedule of tests
17 Test conditions
18 Routine tests
19 Sample tests
20 Type tests - Materials
21 Type tests - Electrical
Annexes
Annex A (informative) - Recommendations for the selection of cables
Annex B (normative) - Information to be supplied and items to be
                      agreed
Annex C (informative) - Recommendations for the installation of
                        cables
Annex D (informative) - Guide to use of cables
Annex E (normative) - Fictitious calculation method for determination
                      of dimensions of protective coverings
Annex F (normative) - Rounding of numbers
Annex G (informative) - Guidance on the scope of type tests
Annex H (normative) - Thickness measurements
Annex I (normative) - Test method for cold strippability of the
                      extruded semi-conducting layer of an
                      insulation screen
Annex J (normative) - Method for measurement of resistivity of
                      extruded semi-conducting conductor screen
                      and insulation screen
Annex K (normative) - Method for measurement of resistivity of
                      lapped inner covering
Annex L (normative) - Wet compatibility test for galvanized
                      steel wires and semi-conducting tape
                      layers
Annex M (normative) - Abrasion test
Annex N (normative) - Test for shrinkage of oversheath on cable
Annex O (normative) - Insulation resistance constant test on
                      oversheath
Bibliography

Describes requirements and test methods for the construction, dimensions and mechanical and electrical properties of armoured cables with thermosetting insulation for rated voltages from 3.8/6.6 (7.2) kV up to 19/33 (36) kV inclusive.

This British Standard specifies requirements and test methods for the construction, dimensions and mechanical and electrical properties of armoured cables with thermosetting insulation for rated voltages from 3.8/6.6 (7.2) kV up to 19/33 (36) kV inclusive which, when assessed by the specified tests, produce lower levels of smoke and corrosive gases on exposure to fire compared to the cables specified in BS 6622. It covers cables designed for a maximum continuous conductor operating temperature of 90 °C and for a maximum short circuit conductor temperature of 250 °C, for use in fixed installations such as networks or industrial installations.

This British Standard specifies single-core and three-core cables for voltages in the range 3.8/6.6 (7.2) kV up to 19/33 (36) kV, with:

a stranded copper, stranded aluminium or solid aluminium conductor or conductors;
cross-linked polyethylene or cross-linked ethylene propylene rubber insulation;
a metallic screening layer of copper wire or copper tape and/or a metallic armour of aluminium or galvanized steel wire;
a thermoplastic oversheath.

NOTE Guidance on the selection of cables is given in Annex A. Information to be supplied by the purchaser, and items to be agreed between the purchaser and the manufacturer, at the time of enquiry and/or order, are given in Annex B. Recommendations for the installation of cables are given in Annex C. Guidance on the use of cables is given in Annex D.

Committee	GEL/20/16
DevelopmentNote	Supersedes BS 7835(2000) & 07/30143023 DC. (11/2007) Reviewed and confirmed by BSI, October 2012. (09/2012)
DocumentType	Standard
Pages	64
PublisherName	British Standards Institution
Status	Current

IEC 60038:2009	IEC standard voltages
BS EN 61034-2 : 2005	MEASUREMENT OF SMOKE DENSITY OF CABLES BURNING UNDER DEFINED CONDITIONS PART 2: TEST PROCEDURE AND REQUIREMENTS
IEC 60502-2:2014 RLV	Power cables with extruded insulation and their accessories for rated voltages from 1 kV (<em>U</em><sub>m</sub> = 1,2 kV) up to 30 kV (<em>U</em><sub>m</sub> = 36 kV) – Part 2: Cables for rated voltages from 6 kV (<em>U</em><sub>m</sub> = 7,2 kV) up to 30 kV (<em>U</em><sub>m</sub> = 36 kV)
BS EN 60332-1-2 : 2004	TESTS ON ELECTRIC AND OPTICAL FIBRE CABLES UNDER FIRE CONDITIONS - PART 1-2: TEST FOR VERTICAL FLAME PROPAGATION FOR A SINGLE INSULATED WIRE OR CABLE - PROCEDURE FOR 1 KW PRE-MIXED FLAME (IEC 60332-1-2:2004)
BS EN 50267-2-1:1999	Common test methods for cables under fire conditions. Tests on gases evolved during combustion of materials from cables. Procedures Determination of the amount of halogen acid gas - Determination of the amount of halogen acid gas
BS EN 60228:2005	Conductors of insulated cables
BS EN 60811-1-1:1995	Insulating and sheathing materials of electric cables. Common test methods. General application Measurement of thickness and overall dimensions. Tests for determining the mechanical properties - Section 1: Measurement of thickness and overall dimensions - Tests for determining the mechanical properties
BS EN 60811-1-3:1995	Insulating and sheathing materials of electric cables. Common test methods. General application Methods for determining the density. Water absorption tests. Shrinkage test
BS EN 10244-2:2009	Steel wire and wire products. Non-ferrous metallic coatings on steel wire Zinc or zinc alloy coatings
BS EN 60885-3:2015	Electrical test methods for electric cables Test methods for partial discharge measurements on lengths of extruded power cables
BS EN 50356:2002	Method for spark testing of cables
IEC 60183:2015	Guidance for the selection of high-voltage A.C. cable systems
BS EN 60230:2002	Impulse tests on cables and their accessories
IEC 60050-461:2008	International Electrotechnical Vocabulary (IEV) - Part 461: Electric cables
BS EN 60811-1-2:1995	Insulating and sheathing materials of electric cables. Common test methods. General application Thermal ageing methods
BS EN 50266-2-4:2001	Common test methods for cables under fire conditions. Test for vertical flame spread of vertically-mounted bunched wires or cables. Procedures Category C
BS EN 10002-1:2001	Tensile testing of metallic materials Method of test at ambient temperature

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BS 7835:2007

Electric cables. Armoured cables with thermosetting insulation for rated voltages from 3.8/6.6 kV to 19/33 kV having low emission of smoke and corrosive gases when affected by fire. Requirements and test methods

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