Fluke 1625 user manual Stakeless Earth/Ground Resistance Testing, Appendix A, Introduction

Stakeless Earth/Ground Resistance Testing

Care and Maintenance

Appendix A

Stakeless Earth/Ground Resistance Testing

Introduction

Stakeless testing provides the ground tester with the unique capability to meas- ure individual ground resistances in multi-grounded systems using two clamp- on current transformers.

The use of ground stakes is not necessary.

Before this method was available, users were required to disconnect an indi- vidual ground path to be tested from other grounds to eliminate the influence of parallel ground paths.

This was time consuming at the minimum and in many cases dangerous.

Once disconnected, the standard 3-pole/terminal ground testing method was used which requires auxiliary earth stakes. In addition to consuming additional time, finding suitable locations for the ground stakes can be difficult and in some cases, impossible. The "stakeless" method of ground resistance testing eliminates these problems and ideally complements the ground testers' stan- dard testing methods.

63