Name: BS 7846 PDF - Engineering Standards Download
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Description

BS 7846 – Electric cables. Thermosetting insulated, armoured, fire-resistant cables of rated voltage 600/1 000 V for fixed installations, having low emission of smoke and corrosive gases when affected by fire. Specification

BS 7846:2015 specifies requirements for construction and performance ofthermosetting insulated, armoured, fire-resistant cables of ratedvoltage 600/1 000 V having low emission of smoke and corrosive gases whenaffected by fire.

This British Standard is applicable to cables for use in fixed installations inindustrial areas, buildings or similar applications, where maintenance of powersupply during a fire is required for a defined period of time.

This British Standard specifies requirements for the following types of cables:

wire armoured and oversheathed cables with two-, three-, four- orfive-cores, and with stranded copper conductor;
multicore auxiliary cables, wire armoured and oversheathed, with strandedcopper conductor.

This British Standard specifies four categories of cables based on theirperformance in tests which assess separately resistance to fire, resistance to firewith water spray and resistance to fire with mechanical shock (Category F2) andwhich assess resistance to fire with direct mechanical impact and water jet incombination (Categories F30, F60 and F120).

This British Standard is applicable to cables that are designed for a maximumsustained conductor temperature of 90 °C and for a maximum short-circuitconductor temperature of 250 °C (for a maximum of 5 s).

NOTE 1 Limitation on the temperature of the cables might be imposed in situationswhere they may be touched or where they could touch other materials.

NOTE 2 Annex A gives the guide to use, Annex B gives armour wire tests, Annex Cgives compatibility test, Annex D gives abrasion test, Annex E gives insulationresistance constant test on oversheath, Annex F gives resistance of conductor andarmour, Annex G gives gross cross-sectional area of armour, Annex H gives a test forshrinkage of oversheath, Annex I gives the fire resistance test for category F2 -additional provisions for cables with a diameter over 20 mm, and Annex J givesnotes on type tests.

Cross References:
BS 6387
BS 7655-1.2
BS 7655-1.3
BS 7655-6.1
BS 7671
BS 8491
BS EN 10244-2:2009
BS EN 50363-5
BS EN 50395
BS EN 50396
BS EN 60228
BS EN 60229
BS EN 60332-1-2:2004
BS EN 60332-3-24:2009
BS EN 60754-1
BS EN 60811-501
BS EN 60811-502
BS EN 61034-2
BS EN 62230
IEC 60050-461
BS 5099
BS 7846:2009
BS 8512
BS 8519:2010
BS 8573:2012
BS EN 50265-2-1
BS EN 50266-2-4
BS EN 50356
BS EN 50393
BS EN 60079-14
BS EN 61914
BS EN 62275
BS EN 62444
IEC 60183