UNDERGROUND HV/EHV CABLE DESIGN (UK)

Complete engineering for underground HV and EHV cable systems—from route optioneering to detailed design, construction packs, and hand‑over. Our designs are practical, standards‑aligned, and ready for tender and build.

Scope we cover

  • Route optioneering: constraints mapping, AEDs, utilities, geotechnics, access, traffic management, and consenting notes.

  • Duct banks & trench details: cross‑sections, spacings, backfill thermal resistivity, and constructability guidance.

  • Joint bays & sealing ends: civil footprints, clearances, cable management, and station interfaces.

  • Thermal ratings (IEC 60287): ampacity, group effects, backfill, and sensitivity analysis for real installation conditions.

  • Pulling calculations: tension/sidewall pressure limits, friction, bend radius checks, method statements, and ITPs.

  • Earthing & bonding: earth grid design, EPR analysis, touch/step compliance, and screen bonding strategies.

  • Construction documentation: drawings, bill of quantities, risk registers, QA packs, and as‑built support.

Designed for UK delivery

We incorporate UK undergrounding practice—direct‑buried vs ducted solutions, tunnel installs, joint bay spacing, EMF considerations, and land‑use constraints—so designs are realistic and approvable with UK stakeholders.

FAQs

Do you handle trial holes and surveys?
We specify trial holes, site surveys, and geotechnical investigations, and we coordinate the findings into route drawings and trench/joint bay details.

How do you treat EMF and land‑use constraints?
We document EMF considerations, easements, and access constraints with route adjustments where needed and clear notes for planning and construction.

Can you support derogations?
Yes—where site conditions require deviations from standard details, we prepare derogation notes with technical justification and risk mitigations.

Ready to plan your route?

What you receive

  • Feasibility report with route options, risks, and preferred alignment

  • Plan/profile drawings, trench/duct details, and joint bay layouts

  • IEC 60287 thermal rating report with installation notes

  • Cable pulling calculation pack + method statements and ITPs

  • Earthing study, bonding diagrams, and EPR/touch‑step compliance report

  • Substation interface drawings (sealing ends, terminations, auxiliary systems)