Earth Resistivity Tests
19 – 23 May 2025 | Abu Dhabi | 20 – 24 Oct. 2025 | Dubai | 15 – 19 Dec. 2025 | Abu Dhabi |
Learning Objectives
Upon successful completion of this course, participants will be able to:
1. Fundamentals of Earth Resistivity and Grounding
- Understand the importance of earth resistivity in grounding systems.
- Learn how soil composition, moisture content, and temperature affect resistivity.
- Differentiate between ground resistance vs. ground resistivity.
- Understand applications of low-resistance grounding for electrical safety.
2. Earth Resistivity Measurement Methods
- Identify the different test methods for measuring soil resistivity:
- Wenner Four-Pin Method (ASTM G57 standard).
- Schlumberger Method for deeper soil analysis.
- Fall-of-Potential Method for ground resistance measurement.
- Clamp-on Ground Resistance Test for existing systems.
- Select the appropriate testing method based on site conditions.
3. Test Equipment and Instrumentation
- Learn how to operate earth resistance testers and megohmmeters.
- Use digital ground testers and clamp meters for non-intrusive testing.
- Follow calibration and verification procedures for accurate readings.
4. Performing Earth Resistivity Tests in the Field
- Follow a step-by-step guide for soil resistivity testing.
- Set up electrode spacing and depth based on project requirements.
- Identify common errors in testing and how to avoid them.
- Record and interpret soil resistivity values for grounding system design.
5. Grounding System Design Based on Soil Resistivity
- Use resistivity test results to design effective grounding electrodes.
- Determine the number and depth of ground rods needed for low resistance.
- Apply chemical grounding and soil treatment techniques for high-resistivity areas.
6. Interpretation of Test Results and Compliance Standards
- Analyze test data trends for different soil layers.
- Compare results with IEEE 80, NEC, IEC 60364, and NFPA 70 standards.
- Ensure compliance with utility and industrial grounding requirements.
7. Troubleshooting and Improving Grounding Performance
- Diagnose high-resistance grounding issues.
- Implement techniques to reduce ground resistance (e.g., grounding grids, conductive backfill).
- Perform periodic ground resistance testing for system maintenance.
8. Case Studies and Practical Applications
- Analyze real-world grounding system failures and solutions.
- Participate in hands-on exercises for soil resistivity measurement.
- Develop a grounding improvement plan based on test results.
Target Audience
- Electrical engineers and safety professionals
- Power plant and substation engineers
- Industrial and commercial facility managers
- Grounding system designers
- Utility and electrical maintenance personnel