Ground & Earthing Testing for Critical Infrastructure

Every lightning protection system, every surge protective device, and every safety earthing connection depends on one thing: a properly performing earthing system. If the earth path is compromised, the protection chain breaks.

Aetheric provides comprehensive earthing testing for new installations requiring commissioning verification and existing systems requiring periodic inspection — building a complete picture of performance under real-world operating conditions.

We use the Megger DET2/3 digital earth tester — precision instrumentation for challenging field conditions:

• Reliable results in high soil resistivity environments
• Accurate measurements in electromagnetically noisy areas
• Effective testing of complex interconnected earthing networks

Test data is processed through XGSLab to derive multi-layer earth structure models that feed directly into earthing system design — ensuring designs are grounded in measured field data, not estimates.

Soil Resistivity Testing

Wenner four-point measurements at multiple probe spacings to develop accurate soil structure models:

• Soil stratification and high-resistivity layer identification
• Site-wide resistivity mapping for large facilities
• Seasonal variation evaluation where temperature/moisture affects conductivity
• XGSLab multi-layer modelling for grounding system design

Earth Resistance Measurement

Fall-of-potential (FOP) testing quantifies resistance between the earthing system and remote earth — the fundamental parameter determining performance:

• Multiple measurement points with proper electrode placement protocols
• Clamp-on and stakeless methods where conventional FOP is impractical
• Touch and step voltage measurements per IEEE 80, IEC 61936, and AS/NZS 3000
• Comparison against calculated values to validate earthing models

Continuity & Bonding Verification

Comprehensive testing of the complete bonding network:

• Continuity between earthing components, structural steel, equipment frames, and cable shields
• Lightning protection down conductor and SPD earth connections
• Exothermic weld and compression joint resistance documentation
• Acceptance criteria verification per AS/NZS 3000 and AS/NZS 4852.1

All equipment calibrated per manufacturer specifications. Testing protocols documented in advance with measurement locations, acceptance criteria, and safety procedures.

• New installation commissioning — verify as-built system meets design intent before energisation
• Periodic compliance verification — most standards require testing at 1–5 year intervals
• Post-incident investigation — following a lightning strike, fault event, or equipment failure
• Facility acquisition due diligence — understand earthing condition before taking ownership
• System expansion or modification — verify performance after adding new equipment or services
• Suspected degradation — corrosion, soil changes, or repeated equipment failures