Earthing Systems Site-Testing and Inspections

Independent earthing system inspections and site testing to verify electrical safety, compliance, and reduce risk across operational environments.

UK-wide services for power earthing systems across substations, renewables, utilities, industrial sites, and data centres.


We carry out earthing inspections in accordance to BS 7430 and other relevant standards, including BS EN 50522, BS EN 61936 and BS EN 7671. Our specialist earthing coordinators provide:

  • Visual inspection of earthing and bonding arrangements
  • Earth continuity and bonding verification
  • Soil resistivity testing
  • Fall of Potential (FoP) testing
  • Earthing electrode & grid testing

All testing is planned with consideration for live operation environments and site safety requirements

Annual and periodic inspections for power earthing systems are commonly required:

  • As part of routine electrical safety inspection programmes
  • To demonstrate ongoing compliance for operational assets
  • Following system modifications or asset upgrades
  • After fault events or safety incidents
  • As part of audit, due diligence, or asset condition assessments

Inspection frequency and scope are typically determined through a risk-based approach aligned with asset criticality and site conditions.

An eps earthing coodinator conducting soil resistivity testing at a Scottish wind farm

Why EPS

At EPS, we work with asset owners, developers, utilities, and contractors across the UK, delivering comprehensive inspection services for various types of power systems. With over 80 years combined experience, our in-house power earthing specialists have a strong track record in providing inspections that support safety, compliance, and smooth operations.

 

Explore Our Brochure

Substation & HV Earthing Inspections

High-voltage installations present elevated risk and require specialist earthing competence. EPS undertakes earthing inspections for HV and LV substations, transmission and distribution assets, and renewable energy infrastructure.

Substation earthing inspections focus on verifying that earthing systems provide effective touch and step voltage protection during earth fault conditions, supporting personnel safety and operational resilience.


What You Receive

Each earthing inspection delivers clear, practical outputs designed to support engineering and operational decision-making. Reporting typically includes:

  • Recorded test results and measured values Identification of defects or non-conformances
  • Evaluation on earthing system condition
  • Practical recommendations for remediation or further investigation
  • Reports are structured to support internal review, regulatory engagement, and asset management processes.

 

Speak to an Earthing Specialist
An EPS power earthing consultant testing an Earth Bar

What Standards Govern Electrical Earthing Systems?

Regular earthing system and lightning protection surveys are a central part of compliance with UK and international electrical safety standards, including:
  • BS 7430: Code of practice for protective earthing of power installations
  • BS EN 50522: Earthing of power installations > 1 kV AC
  • IEC/BS EN 62305: Protection against lightning, including risk management, protection of physical structures, and protection of electronic and electrical systems
  • BS EN 62561: – Lightning Protection System Components
  • UL 467: Grounding and bonding equipment