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BICC or BS7671 comply for design

Anthony Sullivan
Hello IET guys 


I have a problem where a cable installed on site doesn't comply to Bs7671 current  carrying capacity for underground cable reference method D 


the engineer who design the cable used amtech and data from bicc with reference method 110. 


Dose bicc comply? As its old data for cables install in any country from what I can see. I would have thought bs7671 design must be used? 

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  • Former Community Member
    0 Former Community Member
    OK - you need:


    1 - Depth of lay,


    2 - Spacing,


    3 - In ducts or buried direct,


    4 - Ground Temperature,


    5 - Soil Thermal Resistivity,


    6 - Air temperature,


    If you apply the factors in BS 7671 to each of those based on the assumed data in BICC then you should find an exact match (except for the Voltage drop correction factor used in BS 7671 which will further derate the cable)


    For the section on ladder, except where the air temperature is higher than normal, the cable size will be dominated by the buried section


    Regards


    OMS
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  • Former Community Member
    0 Former Community Member
    OK - you need:


    1 - Depth of lay,


    2 - Spacing,


    3 - In ducts or buried direct,


    4 - Ground Temperature,


    5 - Soil Thermal Resistivity,


    6 - Air temperature,


    If you apply the factors in BS 7671 to each of those based on the assumed data in BICC then you should find an exact match (except for the Voltage drop correction factor used in BS 7671 which will further derate the cable)


    For the section on ladder, except where the air temperature is higher than normal, the cable size will be dominated by the buried section


    Regards


    OMS
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