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Direct Buried cables within a controlled area and what constitutes mechanical protection

Former Community Member
Former Community Member
Hello 


I have a  query raised by a client stating that a PV solar Generation site built on agricultural land is non compliant due to direct buried cables. 

Some of the DC string cable is direct buried roughly at 600 depth laid within  cable sand and protection tape over. 

The cable spec is EU and states is suitable for direct burial. 

The protection system constantly monitors the  insulation resistance and dis engages the inverter upon fault. 

The client has stated a non compliance due that no mechanical protection has been installed underground but all cables above ground are mechanically protected. 

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  • 0
    Jam, 110.1.1 does NOT include generating stations. A PV system referred to in line with all the other things is a small domestic one, similar to (vi). The context here is the consumer, not the Grid as I said above.

    BOD, Hi, BS7671 is not and never has been a document that is subject to contract terms. In scope it is the standard, out of scope, do as is necessary following whatever,

    Jam, all items with LV inside do not come under BS7671. The connection to the Grid at HV is the bit that is important. Your invertor for PV may well be LV, but are the insides covered by BS7671, certainly not.

    BOD, your truism is indeed relevant, the result is always a fact of history! 110.2 is especially relevant, it is the consumer side of the meter!
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  • 0
    Jam, 110.1.1 does NOT include generating stations. A PV system referred to in line with all the other things is a small domestic one, similar to (vi). The context here is the consumer, not the Grid as I said above.

    BOD, Hi, BS7671 is not and never has been a document that is subject to contract terms. In scope it is the standard, out of scope, do as is necessary following whatever,

    Jam, all items with LV inside do not come under BS7671. The connection to the Grid at HV is the bit that is important. Your invertor for PV may well be LV, but are the insides covered by BS7671, certainly not.

    BOD, your truism is indeed relevant, the result is always a fact of history! 110.2 is especially relevant, it is the consumer side of the meter!
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