Getting Down to Earth 3APPENDIX I Nomograph Guide to Getting Acceptable Earth Resistance .........................45APPENDIX IIClamp-On Method ...........................................................................................47APPENDIX IIIAttached Rod Technique (ART) .......................................................................53APPENDIX IV Measurement of the Resistance of Large Earth-Electrode Systems: Intersecting Curves Method1 ..........................................................................57Test at a Large Substation .........................................................................58General Comments .....................................................................................59APPENDIX V Slope Method ...................................................................................................61APPENDIX VIFour Potential Method ....................................................................................64APPENDIX VIIStar Delta Method ............................................................................................66APPENDIX VIII Determining Touch and Step Potential .........................................................69APPENDIX IXGround Testing Methods Chart .......................................................................72GROUND TESTERS AVAILABLE FROM MEGGER .............................................74REFERENCES ......................................................................................................76
