Soil Resistivity Testing

 

Strike RA – Engineering Service Datasheet
© Strike RA – 2025

Service: Soil Resistivity Testing and Measurement

Description

Soil Resistivity Testing is performed to determine the electrical resistivity of soil at different depths, which is critical for designing effective earthing systems and lightning protection measures. The service ensures that safety earthing grids and lightning protection systems are appropriately dimensioned and compliant with relevant standards.

Key elements include:

  • On-site resistivity measurements using Wenner or Schlumberger electrical sounding methods.

  • Testing at multiple depths to create a detailed soil resistivity profile.

  • Data collection suitable for single-layer or multi-layer soil modeling.

  • Assessment of soil characteristics for design of earthing grids and protection systems.

Basis / Standards

  • IEC 62305 – Protection against Lightning

  • IEEE 81:2012 – Guide for Measuring Earth Resistivity

  • BS EN 50522 – Earthing of power installations exceeding 1kV AC (UK)

Note: Unless specified otherwise, the latest applicable standard in the client’s country will be applied.

Required Information (from Client)

  • Geographic location of the project.

  • Dimensions of the area to be considered.

  • Access and safety information for the measurement team.

  • Optional: Previous soil resistivity data or geological surveys.

Outcomes / Deliverables

Clients will receive:

  • Detailed report (.pdf) with soil resistivity measurements at multiple depths.

  • Graphs and tables representing resistivity profiles.

  • Recommendations for earthing grid design based on measured soil characteristics.

  • Data suitable for further analysis and modeling for lightning protection and earthing systems.