Based in Kent | Working Nationwide
0330 043 6689 info@rdjointing.co.uk
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HV Cable Jointing

R&D Cable Jointing delivers HV cable jointing for 11kV and 33kV networks across the UK. We support utilities, ICPs, IDNOs, civil contractors, renewables and infrastructure projects with clean workmanship, consistent delivery, and site-ready coordination. Based in Kent and working nationwide, we regularly support projects across Essex, London, Hertfordshire, Surrey, Suffolk, Cambridgeshire and Bedfordshire.

Request a Quote info@rdjointing.co.uk

HV Jointing Services

We carry out HV cable jointing on 11kV and 33kV circuits, supporting both planned installation programmes and urgent repair works. Our work is delivered to manufacturer procedures and aligned to site requirements, permits, outages and programme constraints.

  • 11kV cable jointing: straight joints and transitional joints for distribution networks, renewables and private networks
  • 33kV cable jointing: for renewables, infrastructure and primary network connections
  • HV cable terminations: indoor and outdoor into switchgear, transformers, RMUs and transition points
  • Fault repairs: failed joint replacement and reinstatement works with practical site coordination

Cable Types We Work With

We have experience across all common HV cable types encountered on UK distribution and private networks:

  • XLPE insulated cables: single and three core, 11kV and 33kV
  • PILC (paper insulated lead covered) cables on older networks
  • Waveform cables and specialist constructions
  • Transition joints between XLPE and PILC cable systems

Who We Work With

We support technical and procurement-led teams who need a competent HV cable jointing contractor that turns up prepared, communicates clearly, and completes work to a high standard.

  • DNOs and utility contractors
  • ICPs and IDNOs
  • Civil and principal contractors
  • Renewables and infrastructure delivery teams
  • Industrial and commercial private networks

How We Deliver HV Cable Jointing

  • Scope review: Drawings, cable types, joint types, terminations, access and outage windows reviewed upfront.
  • RAMS and programme alignment: Method statements aligned to your site rules, permits and operational constraints.
  • Controlled installation: Manufacturer procedures followed, clean handling and consistent build-up throughout.
  • Inspection and handover: Clear records, photographs where required, sign-off support ready for your QA or client audit.
  • Support through completion: Testing, energisation support and defects close-out. We stay engaged until the job is properly done.

Areas: Essex, London, Kent, Hertfordshire, Surrey, Suffolk, Cambridgeshire, Bedfordshire, and nationwide for the right programme. Contact us with your location and scope.

FAQs

Your questions answered

What areas do you cover?
Based in the South East (Kent), we work nationwide across the UK. We regularly support projects across Essex, London, Kent, Hertfordshire, Surrey, Suffolk, Cambridgeshire and Bedfordshire, and travel further for larger projects.
What voltages can you work with?
LV, 11kV and 33kV. Our SAP authorisations cover up to 33kV for switching, permits and live working supervision.
What types of cable do you joint?
PILC, XLPE, Waveform and other common LV/HV cable types. If you're unsure whether we can handle your cable type, just ask.
Can you handle full substation installations?
Yes. We handle everything from landing, earthing and fit-out through to testing, commissioning, DNO audit attendance and taking control of the LV network on connection day on behalf of the IDNO.
What's the difference between a jointer and a SAP?
A jointer physically installs and connects cables. A Senior Authorised Person (SAP) issues permits and ensures the system is safe to work on. We provide both in-house.
Can you supply materials or work labour-only?
Both. We're happy to supply jointing kits and accessories, or to work with your own supplied materials, whatever suits the job.
How do I get a quote?
Email info@rdjointing.co.uk with your scope, cable type, voltage and location. We'll come back quickly with availability and a clear plan.

Ready to discuss your project?

Send us the scope, cable type, voltage and location and we'll come back with availability and a clear plan. No lengthy process, just a straight answer.

Request a Quote 0330 043 6689