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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
    RE Elltec:

    IET code of practice for grid connected solar PV systems 2015 section 8.2.  states in blue mandatory text General BS7671 requirements are for AC only 

    BS EN 62446 covers the PV DC side 

     


    That sounds very peculiar to me - BS 7671 section 712 is full of requirements for the d.c. side and written in the usual section 7 way of modifying the general requirements - they'd hardly made sense as 'stand alone' special installation requirements.


    As far as I can tell BS EN 62446 only covers "Requirements for testing, documentation and maintenance" - so nothing about design or installation - was the quote perhaps taken from a section concerned only with ongoing maintenance and testing perhaps?


       - Andy.


Reply
  • 0
    RE Elltec:

    IET code of practice for grid connected solar PV systems 2015 section 8.2.  states in blue mandatory text General BS7671 requirements are for AC only 

    BS EN 62446 covers the PV DC side 

     


    That sounds very peculiar to me - BS 7671 section 712 is full of requirements for the d.c. side and written in the usual section 7 way of modifying the general requirements - they'd hardly made sense as 'stand alone' special installation requirements.


    As far as I can tell BS EN 62446 only covers "Requirements for testing, documentation and maintenance" - so nothing about design or installation - was the quote perhaps taken from a section concerned only with ongoing maintenance and testing perhaps?


       - Andy.


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