Electrical Engineering · Earthing and Grounding
During earth resistance testing using the 3-point (fall-of-potential) method, what are the functions of the two auxiliary electrodes?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Both are used to measure voltage drop only
- 2One measures voltage drop and the other injects current✓
- 3Both supply power to the main earth electrode
- 4Both are used to measure soil moisture content
Correct answer
One measures voltage drop and the other injects current
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