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Buried ducts for medium voltage cables

vici
Hello everyone,


Is there any BS or IEC standard indicating typical configurations for multiple ducts buried in the ground? This is mainly in relation to medium voltage cables.


Specifically, I wondered if there was a standard giving guidance on typical arrangements used for multiple ducts to be laid in the ground (e.g ducts arrangement like 3 x 5 or 4 x 4) and backfilling material requirements (e.g. ducts surrounded by concrete or other back fill materials etc..). I am aware of all the minimum depths form the ground level, depending on the conditions (e.g. carriageways, footways, arable land etc..) but I wondered if there were also indications from BS or IEC documents for typical layouts / engineering solutions.


thank you
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    Even more interesting that they use the "IEC Definition" of Medium Voltage, when IEC themselves state there is no agreed international definition.The definition that they do have on Electropedia (IEC 60050 online and probably their only free standard) is as follows:
    medium voltage (abbreviation: MV) (not used in the UK in this sense, nor in Australia)
    any set of voltage levels lying between low and high voltage
    Note – The boundaries between medium- and high-voltage levels overlap and depend on local circumstances and history or common usage. Nevertheless the band 30 kV to 100 kV frequently contains the accepted boundary.

    You are quite right in your comment Andy since HV and LV are the only terms that are properly defined.


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  • 0
    Even more interesting that they use the "IEC Definition" of Medium Voltage, when IEC themselves state there is no agreed international definition.The definition that they do have on Electropedia (IEC 60050 online and probably their only free standard) is as follows:
    medium voltage (abbreviation: MV) (not used in the UK in this sense, nor in Australia)
    any set of voltage levels lying between low and high voltage
    Note – The boundaries between medium- and high-voltage levels overlap and depend on local circumstances and history or common usage. Nevertheless the band 30 kV to 100 kV frequently contains the accepted boundary.

    You are quite right in your comment Andy since HV and LV are the only terms that are properly defined.


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