Ensuring safety, compliance, and reliability

We specialise in delivering complete transmission and distribution solutions, covering every detail from planning to execution, with a commitment to national energy resilience.

With a dedicated team of experienced engineers and full-time site testing specialists, our Earthing service offers expert solutions for assessing, managing, and evaluating risks in High Voltage earthing and lightning protection systems. We utilise the full suite of industry-leading CDEGS software, with engineers certified up to the highest qualification available, ensuring precision, compliance, and peace of mind.

Our commitment to excellence ensures that we set the industry benchmark for safety, compliance, and reliability:

  • Earthing, lightning protection design solutions and condition assessments
  • Keeping staff, contractors, and the public safe
  • Gaining land access with professionalism and respect
  • Protecting the environment and minimising impact to third-party land and crops
  • Delivering exceptional service through highly skilled professionals and state-of-the-art equipment

Site works

Earthing condition assessments
  • Visual inspection of above-ground earthing systems
  • Continuity testing for effective grounding
  • Joint testing and detailed inspections
  • Fence and gate earthing assessments
  • Fall-of-potential testing for earthing resistance
  • AC impedance measurements for system evaluation
  • Current injection testing for performance analysis
  • Touch, step, and transfer voltage assessments
  • Soil resistivity measurements using Wenner soundings
  • Earth conductor location and tracing (electromagnetic & GPR techniques)
  • Third-party impact surveys
  • Often frequented tower (OFT) assessments
  • Incident and failure investigations

Design works

HV earthing design studies
  • Touch & step voltage assessments
  • Third-party impact assessments (including hot site evaluations (ENA EREC S41))
  • LV earthing advice – Tailored guidance for safe and efficient low-voltage grounding
  • Compliance to DNO/TNO, ENA regulations, and BS EN 50522
  • LV network earthing impact assessments
  • Pipeline impact assessments, covering transmission and distribution networks, overhead and underground circuits
  • Renewable energy site impact assessments (addressing DC impacts and cathodic protection requirements)
  • Quantitative Risk Assessments (QRA) that mitigate risks for complex and challenging sites
  • Impressed Voltage studies for works in or near substations including compliance to NG/SR234 and TP 290
  • Earthing design CAD drawings
  • Lightning protection risk assessments that ensure safety in accordance with BS EN 652305
  • Lightning protection design including 3D rolling sphere assessments
  • Policy development support to help organisations create and refine earthing policies

Our full turnkey engineering solutions

Welcome to the new home of LSTC Group - an incorporation of Earthing Risk Management Ltd (ERM) and LS Transmission Consultancy Ltd.