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Earth & Lightning Measured Ground Resistance

  • 12-09-2014 12:37pm
    #1
    Filter Brewer
    Registered Users, Registered Users 2 Posts: 6 ✭


    I'm looking for some guidance on what the measured ground resistance values should be in general and more interesting at a maximum? Measuring at the electrode using a Fluke 1630 in commercial and industrial industries. Any reference material would be greatly appreciated, I'm struggling to find anything definitive in the ETCI regs or on the net.


Comments

  • #2
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,641 Mod ✭✭✭✭2011


    Filter Brewer wrote: »
    I'm looking for some guidance on what the measured ground resistance values should be in general and more interesting at a maximum? Measuring at the electrode using a Fluke 1630 in commercial and industrial industries. Any reference material would be greatly appreciated, I'm struggling to find anything definitive in the ETCI regs or on the net.

    A few years ago I witnessed testing of an industrial installation.
    Individual earth electrodes were disconnected and the resistance between the electrode & and the general mass of earth was measured using the "Wenner" method. Typical values were between 150 & 200 Ohms. The Fluke should provide the same reading. We found that the horizontal conductors between electrodes helped to get the resistance for an entire earth pit to reduce considerably.

    I imagine that during design a soil resistivity report would have been issued.

    Will have a look for reference material.


  • #3
    Stoner
    Registered Users, Registered Users 2 Posts: 10,952 ✭✭✭✭Stoner


    http://www.fluke.com/fluke/caen/solutions/earthground/soil-resistivity-method.htm

    have a look on the fluke site, they are using the Fluke 1625 in the test, I'm sure yours can do it too.


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