ETT Study Guide Book 3: Component Testing

M. Grounding Systems

1. Properties and Types

Identify properties, types, and applications 2, 3, 4

Essential Reading

Grounding Principles

2. Inspection and Test Procedures

Apply visual and mechanical inspections 2, 3, 4

Important Standards

Grounding System Inspections

Employ methods and procedures for electrical tests 2, 3, 4

Important Standards

  • IEEE 81 Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Grounding System 2 3
  • IEEE 80 Guide for Safety in AC Substation Grounding 3 4
  • NFPA 70B: Chapter 11.13 Grounding Systems 2 3 4

Fall-of-Potential (3-point)

Soil Resisivity (4-point)

Clamp-On Testing

Ground Testing - General

3. Interpretation of Test Results

Evaluate results of electrical tests 2, 3, 4

Important Standards

Employ methods of enhancing effectiveness of grounding systems 3

Important Standards

Last Update: May 25, 2022