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Bonding industrial buildings

Sparky gaz

Bonding question 

Our main 2000a dis board is 150meters away from the main incoming water supply .. We presently have a 50mm bonding cable going to a 25mm water incoming supply is this acceptable?..

Also our gas is 15meters away from main dis board . presently has a 50mm bonding going the gas 5" incomer is this acceptable ? in 2016 it had a code C2 put on it during a eicr im about to do a new eicr and just wanted to check as struggling to find much in the regs book about gas about 28mm

  • 0 in reply to David Stone

    Just weld on a spur to the pipe for attaching a bonding clamp or two.

    Or just split the cables to more manageable sizes as per photo.

    Z.

  • 0 in reply to David Stone

    Thank you for your reply . This is exactly what I thought and was a bit confused where the issue is. Yes we have our own transformer with a tncs supply . No no reference was given just main bond undersized? But a 50mm what size were the 2018 test persons expecting . 

  • 0 in reply to John Peckham

  • 0 in reply to Sparky gaz

    "Undersized bonds"  maybe not - as we have calculated above.  or have they been up-sized from something thinner., and what you see now is the improved version ?
    It would be unusual to leave a C2 for that long
    Mike.

  • 0 in reply to Zoomup

    nah Weld or braze on one M16 or M20  stud -parallel conductors may not share fault currents well.

    A 50mm  cable is not that unwieldy.
    Mike

  • 0

    I`d question what item 3 actually means too

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