BS 8436:2011 pdf download
BS 8436:2011 pdf download.Electric cables – Specification for 300/500 V screened electric cables having low emission of smoke and corrosive gases when affected by fire, for use inwalls, partitions and building voids – Multicore cables.
11.4 Additional information
Any additional information shall be embossed, indented or printed throughout the length of the external sheath of the cable.
The additional information shall be in one continuous string such that it does not conflict with, confuse nor render illegible the marking in 11.1. 11.2 and 11.3. The repeat interval shall not exceed 1 100 mm.
12 Requirements for safe selection of protective devices and maximum current rating of cables
The protective devices used for the cables covered by this British Standard shall be either a Type B circuit breaker conforming to BS EN 60898 or a Type B RCBO conforming to BS EN 61009.1. The protective devices shall have a maximum let-through energy (l2t) of 42 000 Ws when used with 1.0 mm2 or 1.5 mm2 cable, and 60 000 A2s when used with 2.5 mm2 or 4,0 mm2 cable.
The maximum current rating used for cables to this British Standard shall be not greater than 16 A for the 10 mm2 cable, 20 A for the 1.5 mm2 cable, 32 A for the 2.5mm2 cable (when used in a ring circuit) and 32 A for the 4.0 mm2 cable,
NOTE 7 These stated maximum current ratings might need to be further reduced dependant on the precise installation conditions used for the cable.reference needs to be made to BS 7671 or the cable manufacturer for current ratings in various installation conditions.
NOTE 3 The designer of the circuit might consider additionally having supplementary protection by a residual current device in accordance with
85 7671:2008, 415.1.1.
13 Schedule of tests
The tests to be performed on cables specified in this standard shall be as scheduled in Table 3, which refers to the relevant clauses of the standard specifying the requirements and test methods as well as the category of each test which applies, i.e. T, S or R (as defined in Clause 3) and which also indicates which tests relate to complete cable, and which relate to components.
14 Routine test for complete cables
14.1 General
The test specified in 14.2 shall be carried out under the test conditions specified in Annex C.
NOTE Routine tests for components are covered in Clauses 5 to 10 and are identified in Table 3.
14.2 Absence of faults on insulation
When the completed cable is tested in accordance with Annex D without immersion in water, there shall be no breakdown of the insulation.
15 Sample tests for completed cables
15.1 General
The tests specified in this clause shall be carried out under the test conditions specified in Annex C. unless otherwise specified in the details of a particular test
NOTE Samp?e tests for components are covered in Clauses 5 to 10 and are identified in Table 3.
15.2 Conductor resistance
When measured in accordance with BS EN 60228 and corrected to 20 C. on a
sample of cable not less than 1 m in length, the d.c. resistance of each
conductor shall conform to BS EN 60228.
15.3 Voltage withstand
When tested in accordance with Annex E, there shall be no breakdown of the insulation or sheath.
15.4 Flame propagation
When tested in accordance with BS EN 60332-1-2. the completed cable shall confo(m to the flame propagation requirements specified in
BS EN 60332-1-2:2004, Annex A.
15.5 Smoke emission
When tested in dccordarice with BS EN 61034-2, using the apparatus specd ied in
OS EN 61034-1 and the number of cables specified in BS EN 61034-2:2005.
5.2.1.1. as a flat horizontal unit, the smoke generated shall result in
transmittance values of not less than 80%.
16 Type tests for completed cables
16.1 General
The tests specified in this clause shall be carried out under the test conditions specified in Annex C, unless otherwise specified in the details of a particular test.
NOTE Sample tests for components are covered in Clauses 5 to 10 and are ,dentif,ed In Table 3.
