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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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  • 0
    I'm interested in your use of the term "medium voltage cables".

    I have searched in vain for a definition of this. The nearest I can get is that :
    "High voltage systems are defined as those that operate at voltages exceeding 1000V ac or 1500V dc between conductors and/or 600volts ac or 900volts dc between conductors and earth." and low voltage below this. I suspect that this isn't what you mean.

    I have also heard 132kV being referred to as medium voltage (with 250kV and 400kV as high voltage).

    For clarity I have always referred to the voltage in question by a number, i.e.3.3kV or 11kV.

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  • 0
    I'm interested in your use of the term "medium voltage cables".

    I have searched in vain for a definition of this. The nearest I can get is that :
    "High voltage systems are defined as those that operate at voltages exceeding 1000V ac or 1500V dc between conductors and/or 600volts ac or 900volts dc between conductors and earth." and low voltage below this. I suspect that this isn't what you mean.

    I have also heard 132kV being referred to as medium voltage (with 250kV and 400kV as high voltage).

    For clarity I have always referred to the voltage in question by a number, i.e.3.3kV or 11kV.

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