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    • method statement megger testing

    method statement megger testing

    • Posted by Hany Ismail, MSC, PMP
    • Categories Project Management
    • Date January 17, 2013
    • Comments 3 comments

    method statement megger testing for power cables &branch circuit wiring, Megger Test Equipment,Cable Megger Testing Procedure.


    EQUIPMENT AND TOOLS megger testing:-

    1. Megger Instrument shall be having valid calibration.

    2. Megger-with range 500V/1000V shall be used for conducting the test.

    Megger range 500 V shall be used for Wire testing

    Megger range 1000 V shall be used for Cable testing


    method statement megger testing
    method statement megger testing

    PRE – TEST PREPARATION megger testing:-

    1. The leads used for connecting megger testing with the circuit should be fault free and the two connecting leads should have electrical continuity. It is checked by touching the free ends of the leads together while the megger button is pressed ON to check for zero resistance.

    2. Check for PVC adopters are provided for cables and male adapter for all PVC conduits terminating in the panel board.

    3. Check the dressing is complete for all the wires in the panel boards

    4. Confirm all the connections are completed before the testing.


    ELECTRICAL CONTINUITY TEST megger testing;-

    1. Connect the free megger test probes to any two conductors required to be tested.

    2. With all the appliance connected or the two ends of the conductors shorted and all Switches switched ON the reading shown on the megger should be zero. If the reading shows infinity then there is an open circuit. The fault should be traced and rectified.

    3. For cables, the extreme ends of any two phase is shorted and when the test is conducted the reading should be zero if the meter reads infinity or some value of mega ohms then there is a fault in the cable and it should be rectified. Same procedure shall be repeated for other 3 conductors of the cable.

    SHORT CIRCUIT TEST / INSULATION RESISTANCE TEST;-

    FOR WIRES;

    1. For wires the circuit is tested, Megger range should be 500V

    I. Between phase and neutral.

    II. Between phase to earth

    III. Between neutral to earth

    With the other ends of the circuit conductor open the value should be infinity for all the test. If the value is zero there is short circuit or the insulation of the wire is damaged and the wire is changed accordingly.

    FOR CABLES:-

    For Cables the Megger range should be 1000V, and both the ends of the cable shall be kept open and test shall be conducted between phases and neutrals as follows:

    neutrals as follows:

    i.RtoY

    ii.RtoB

    iii.YtoB

    iv.RtoN

    V.YtoN

    vi.BtoN


    all these reading should be infinity, if otherwise the cable ^ores/phases are faulty and should be rectified.

    The test results shall be recorded in a format for Engineers reference and record. The format shall be submitted to Consultant for approval in advance prior to perform the megger test operation.


     

    Tag:cable, megger testing, method statement, method statement megger testing, test

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    Hany Ismail, MSC, PMP
    Hany Ismail, MSC, PMP

    Hany Ismael is the founder and CEO of Planning Engineer Est. in Egypt. He has started his career back in 2003 as a site engineer, technical office engineer, planning engineer, planning manager, and finally planning department manager where he has been involved in several mega construction projects in Egypt and Saudi Arabia. In 2016, he established his own company in Egypt “Planning Engineer Est.” Hany gained his MSc degree in project management from Liverpool University-UK 2013-2016, PMP certified from PMI-USA 2010, and BSc Civil Engineer Tanta University-Egypt 2003. Hany provided more than 3,500 hours of planning and project management training on his website planningengineer.net, YouTube channel, and offline courses since 2011. He enjoys teaching project management in simple and practical way, and he developed several planning tools, techniques and courses.

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      3 Comments

    1. blank
      Schmuelsons Reid
      June 10, 2013
      Log in to Reply

      Somebody with hands on experience please help me on this one. Considering the high voltage involved I need to clarify and propose and calculate the risk, probability and the severity of the works impact.

    2. blank
      i am engineer
      June 2, 2015
      Log in to Reply

      Thank you for this very informative blog post. I am also a Civil Engineer and I am currently into Mechanical and Electrical works. You are an inspiration to me!

    3. blank
      Karuti dickson mashauri
      November 25, 2016
      Log in to Reply

      Am also a civil engineer at university of dar es salaam,i thanks to all who giving more explanation for different definition and principles.

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