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Inspection & Testing

Derek Eccles

I am a project manager, constructing new waste water treatment works, for a water company. The contractor building the new works has provided a program which has 4 months between  part 1 (dead testing) and part 2 (live testing) of the NICIEC certification. In between these dates, the contractor will test and commission of the plant and equipment e.g. pumps, actuated valves, instrumentation, screens etc.

Would it be correct to say, this does not comply with the wiring regulations ? 

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  • 0

    Hmmmm…..

     

    For a couple of years - back in 2005-2007 somewhere - I was involved in the whole waste water treatment plant world as an installer only and a very new QS.

     

    The supplies to MCCs are easy to dead test and live test. No issue there - it’s a conventional supply. 
     

    After the MCC, however, it’ll all likely be variable speed drives supplying a row of din rail terminals at the top of the MCC- from there in SWA out to the pits terminal boxes/ isolators and eventually pumps. 
     

    There’s almost no conventional way to test the supplies south of a variable speed drive- and all of the flow switches and level sensors etc are all ELV. 
     

    Dead testing is obviously essential for each and every cable but live testing will be very limited to the MCC intake supply. earth long lead tests might be a very good check before energising- but this is a dead test too……

     

    I wonder what live tests the contractors are proposing to do?

Reply
  • 0

    Hmmmm…..

     

    For a couple of years - back in 2005-2007 somewhere - I was involved in the whole waste water treatment plant world as an installer only and a very new QS.

     

    The supplies to MCCs are easy to dead test and live test. No issue there - it’s a conventional supply. 
     

    After the MCC, however, it’ll all likely be variable speed drives supplying a row of din rail terminals at the top of the MCC- from there in SWA out to the pits terminal boxes/ isolators and eventually pumps. 
     

    There’s almost no conventional way to test the supplies south of a variable speed drive- and all of the flow switches and level sensors etc are all ELV. 
     

    Dead testing is obviously essential for each and every cable but live testing will be very limited to the MCC intake supply. earth long lead tests might be a very good check before energising- but this is a dead test too……

     

    I wonder what live tests the contractors are proposing to do?

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