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Technical Information for:

  • Flat Twin and Earth BS6004
  • Flat Three Core and Earth BS6004
  • Ambient temperatureá : 30║C

    Conductor operating temperature : 70║C

    CURRENT CARRYING CAPACITY (AMPS)

    Conductor
    Cross Sectional Area
    Enclosed in an insulated wall Enclosed in conduit on a wall or in trunking etc... Clipped direct
    1.0mm▓ 11A 10A 13A 11.5A 15A 13.5A
    1.5mm▓ 14A 13A 16.5A 15A 19.5A 17.5A
    2.5mm▓ 18.5A 17.5A 23A 20A 27A 24A
    4.0mm▓ 25A 23A 30A 27A 36A 32A
    6.0mm▓ 32A 29A 38A 34A 46A 41A
    10.0mm▓ 43A 39A 52A 46A 63A 57A
    16.0mm▓ 57A 52A 69A 62A 85A 76A

     

    VOLTAGE DROP (PER AMPERE MTRE)
    Conductor Cross Sectional Area Two Core d.c. Two Core Cable 
    single phase a.c.
    Three or Four core cable 
    three phase a.c.
    1.0mm▓ 44mV 44mV 38mV
    1.5mm▓ 29mV 29mV 25mV
    2.5mm▓ 18mV 18mV 15mV
    4.0mm▓ 11mV 11mV 9.5mV
    6.0mm▓ 7.3mV 7.3mV 6.4mV
    10.0mm▓ 4.4mV 4.4mV 3.8mV
    16.0mm▓ 2.8mV 2.8mV 2.4mV


    If cables are to be used in ambient air temperature other than 30║C the following ratings should be applied.
    Ambient air temperature 30║C 25 30 35 40 45 50 55 60 65
    Rating Factor 1.03 1.0 0.94 0.87 0.79 0.71 0.61 0.50 0.35


    Technical Information for:

  • XLPE/PVC/SWA/PVC ARMOURED CABLE

  • CURRENT CARRYING CAPACITY (AMPS)

    Clipped Direct In Free Air Direct in Ground or Ducting
    Nominal Conductor Area 2 Core 3 & 4 Core Nominal Conductor Area 2 Core 3 & 4 Core Nominal Conductor Area 2 Core 3 & 4 Core
    1.5mm▓ 27 23 1.5mm▓ 29 25 1.5mm▓ 25 21
    2.5mm▓ 36 31 2.5mm▓ 39 33 2.5mm▓ 33 28
    4.0mm▓ 49 42 4.0mm▓ 52 44 4.0mm▓ 43 36
    6.0mm▓ 62 53 6.0mm▓ 66 56 6.0mm▓ 53 44
    10.0mm▓ 85 73 10.0mm▓ 90 78 10.0mm▓ 71 58
    16.0mm▓ 110 94 16.0mm▓ 115 99 16.0mm▓ 91 75
    25.0mm▓ 146 124 25.0mm▓ 152 131 25.0mm▓ 116 96
    35.0mm▓ 180 154 35.0mm▓ 188 162 35.0mm▓ 139 115
    50.0mm▓ 219 187 50.0mm▓ 228 197 50.0mm▓ 164 135
    70.0mm▓ 279 238 70.0mm▓ 291 251 70.0mm▓ 203 167
    95.0mm▓ 338 289 95.0mm▓ 354 304 95.0mm▓ 239 197
    120.0mm▓ 392 335 120.0mm▓ 410 353 120.0mm▓ 271 223
    150.0mm▓ 451 386 150.0mm▓ 472 406 150.0mm▓ 306 251
    185.0mm▓ 515 441 185.0mm▓ 539 463 185.0mm▓ 343 281
    240.0mm▓ 607 520 240.0mm▓ 636 546 240.0mm▓ 395 324
    300.0mm▓ 698 599 300.0mm▓ 732 628 300.0mm▓ 446 365
    400.0mm▓ 787 673 400.0mm▓ 847 728 400.0mm▓ - -

  • Standard depth of laying: 0.5m
  • Thermal resistivity of soil: 1.2║C m/W
  • Standard ground temperature: 20║C
  • Ambient air temperature: 30║C
  • Maximum conductor temperature: 90║C
  • For 2 core - single phase a.c., 3 & 4 core - three phase a.c. - ratings do not apply if the cable is protected by a semi-enclosed fuse to BS3036.

    For cables of 5 cores and above it is assumed only 2 cores are loaded simultaneously (ie live and neutral) and the 2 core rating should be taken. In instances where several cores are loaded simultaneously, the following rating factors should be applied to the 2 core current rating.

    Number of cores 2 3 4 5 6 7 10 12 -
    Factor 1.0 0.87 0.78 0.72 0.67 0.63 0.56 0.53 -
    Number of cores 14 19 24 27 30 37 44 46 48
    Factor 0.51 0.45 0.42 0.40 0.39 0.36 0.34 0.33 0.33

     

    If cables laid in air temperatures other than those specified the following ratings should be applied:
    Ambient air temperature 30║C 25 30 35 40 45 50 55
    Rating Factor 1.0 0.96 0.92 0.88 0.83 0.78 0.73


    If cables laid in ground and single way ducts with temperatures other than those specified the following ratings should be applied:
    Ambient air temperature 30║C 10 15 20 25 30 35 40
    Rating Factor 1.03 1.0 0.97 0.93 0.89 0.86 0.82


    VOLTAGE DROPS (AMPS PER METRE)
    Conductor Cross Sectional Area Two Core Cable 
    d.c.
    Two Core Cable Single Phase
    a.c.
    Three or Four Cable Three Phase
    a.c.
    1.5mm▓ 31mV 31mV 27mV
    2.5mm▓ 19mV 19mV 16mV
    4.0mm▓ 12mV 12mV 10mV
    6.0mm▓ 7.9mV 7.9mV 6.8mV
    10.0mm▓ 4.7mV 4.7mV 4.0mV
    16.0mm▓ 2.9mV 2.9mV 2.5mV
        r x z r x z
    25.0mm▓ 1.85mV 1.85mV 0.160mV 1.90mV 1.60mV 0.140mV 1.65mV
    35.0mm▓ 1.35mV 1.35mV 0.155mV 1.35mV 1.15mV 0.135mV 1.15mV
    50.0mm▓ 0.98mV 0.99mV 0.155mV 1.00mV 0.86mV 0.135mV 0.87mV
    70.0mm▓ 0.67mV 0.67mV 0.150mV 0.69mV 0.59mV 0.130mV 0.60mV
    95.0mm▓ 0.49mV 0.50mV 0.150mV 0.52mV 0.43mV 0.130mV 0.45mV
    120.0mm▓ 0.39mV 0.40mV 0.145mV 0.42mV 0.34mV 0.130mV 0.37mV
    150.0mm▓ 0.31mV 0.32mV 0.145mV 0.35mV 0.28mV 0.125mV 0.30mV
    185.0mm▓ 0.25mV 0.26mV 0.145mV 0.29mV 0.22mV 0.125mV 0.26mV
    240.0mm▓ 0.195mV 0.20mV 0.140mV 0.24mV 0.175mV 0.125mV 0.21mV
    300.0mm▓ 0.155mV 0.16mV 0.140mV 0.21mV 0.140mV 0.120mV 0.185mV
    400.0mm▓ 0.120mV 0.13mV 0.145mV 0.195mV 0.115mV 0.125mV 0.170mV


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