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Division 1.3 For the purposes of Table 4 the following symbols and test parameters apply:

United Kingdom

Original text. Later amendments are not shown.

(1) ‘HRRsm30, kW’

  • heat release rate averaged by a 30-s sliding average;

    • (2) ‘SPRsm60, m2/s’

  • smoke production rate averaged by a 60-s sliding average;

    • (3) ‘Peak HRR, kW’

  • maximum of HRRsm30 between test start and end of test, excluded contribution from ignition source;

    • (4) ‘Peak SPR, m2/s’

  • maximum of SPRsm60 between test start and end of test;

    • (5) ‘THR1200, MJ’

  • total heat release (HRRsm30) from test start until end of test, excluded contribution from ignition source;

    • (6) ‘TSP1200, m2’

  • total smoke production (HRRsm60) from test start until end of test;

    • (7) ‘FIGRA, W/s’

  • fire growth rate index defined as the highest value of the quotient between HRRsm30 excluding the contribution of ignition source and time. Threshold values HRRsm30 = 3 kW and THR = 0,4 MJ;

    • (8) ‘FS’

  • flame spread (damaged length);

    • (9) ‘H’

  • flame spread.

    • Notes on Annex

    Footnotes

    f1

    For homogeneous products and substantial components of non-homogeneous products.

    f2

    For any external non-substantial component of non-homogeneous products.

    f3
    1. (2a)

      Alternatively, any external non-substantial component having a PCS ≤ 2,0 MJm– 2, provided that the product satisfies the following criteria of EN 13823(SBI): FIGRA ≤ 20 Ws– 1; and LFS < edge of specimen; and THR600s ≤ 4,0 MJ; and s1; and d0.

    f4

    For any internal non-substantial component of non-homogeneous products.

    f5

    For the product as a whole.

    f6

    s1 = SMOGRA ≤ 30m2s– 2 and TSP600s ≤ 50m2; s2 = SMOGRA ≤ 180m2s– 2 and TSP600s ≤ 200m2; s3 = not s1 or s2.

    f7

    d0 = No flaming droplets/particles in EN 13823 (SBI) within 600s; d1 = No flaming droplets/particles persisting longer than 10s in EN 13823 (SBI) within 600s; d2 = not d0 or d1; Ignition of the paper in EN ISO 11925-2 results in a d2 classification.

    f8

    Under conditions of surface flame attack and, if appropriate to the intended use of the product, edge flame attack.

    f9

    No ignition of the paper = no additional classification; Ignition of the paper = d2 classification.

    f10

    For homogeneous products and substantial components of non-homogeneous products.

    f11

    For any external non-substantial component of non-homogeneous products.

    f12

    For any internal non-substantial component of non-homogeneous products.

    f13

    For the product as a whole.

    f14

    Test duration = 30 minutes.

    f15

    Critical flux is defined as the radiant flux at which the flame extinguishes or the radiant flux after a test period of 30 minutes, whichever is the lower (i.e. the flux corresponding with the furthest extent of spread of flame).

    f16

    s1 = Smoke ≤ 750 %.min; s2 = not s1.

    f17

    Under conditions of surface flame attack and, if appropriate to the intended use of the product, edge flame attack.

    f18

    For homogeneous products and substantial components of non-homogeneous products.

    f19

    For any external non-substantial component of non-homogeneous products.

    f20

    For any internal non-substantial component of non-homogeneous products.

    f21

    For the product as a whole.

    f22

    s1 = SMOGRA ≤ 105 m2s– 2 and TSP600s ≤ 250 m2; s2 = SMOGRA ≤ 580 m2s– 2 and TSP600s ≤ 1 600 m2; s3 = not s1 or s2.

    f23

    d0 = No flaming droplets/particles in EN13823 (SBI) within 600s; d1 = No flaming droplets/particles persisting longer than 10s in EN13823 (SBI) within 600s; d2 = not d0 or d1; Ignition of the paper in EN ISO 11925-2 results in a d2 classification.

    f24

    Under conditions of surface flame attack and, if appropriate to the intended use of the product, edge flame attack.

    f25

    No ignition of the paper = no additional classification; Ignition of the paper = d2 classification.

    f26

    For the product as a whole, excluding metallic materials, and for any external component (i.e. sheath) of the product.

    f27

    s1 = TSP1200 ≤ 50 m2 and Peak SPR ≤ 0,25 m2/s

    s1a = s1 and transmittance in accordance with EN 61034-2 ≥ 80 %

    s1b = s1 and transmittance in accordance with EN 61034-2 ≥ 60 % < 80 %

    s2 = TSP1200 ≤ 400 m2 and Peak SPR ≤ 1,5 m2/s

    s3 = not s1 or s2

    f28

    The smoke class declared for class B1ca cables must originate from the EN 50399 test (30 kW flame source).

    f29

    d0 = No flaming droplets/particles within 1 200 s; d1 = No flaming droplets/particles persisting longer than 10 s within 1 200 s; d2 = not d0 or d1.

    f30

    EN 60754-2: a1 = conductivity < 2,5 μS/mm and pH > 4,3; a2 = conductivity < 10 μS/mm and pH > 4,3; a3 = not a1 or a2.

    f31

    The smoke class declared for class B2ca, Cca, Dca cables must originate from the EN 50399 test (20,5 kW flame source).