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Delivering training services for the Built Environment and Utility sectors since 2004, we operate from our purpose-built training facilities and regional offices located in Southeast London, the East Midlands and West Yorkshire, with the use of over 100 training centres nationwide.

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High Voltage Jointing 11KV (DNO)


To classify as high voltage, transmission cables will run anything above 33kv. They won’t run your washing machine or power the cable TV. Rather the mains electricity to residential buildings, commercial properties, and transport services. high voltage cables are typically used underground because of their volatility versus low voltage. They are identified by a cable identifier that can see through the extensive armour and jointing required to protect itself and people in the vicinity.

Course Outline

Through a mix of practical and theory-based exercises and tutorials, this Citrus High Voltage Jointing 11KV (DNO) qualification gives delegates the understanding, skill, knowledge, and competence to carry out Jointing work on the 11KV Networks, old and new cable Jointing, Triplex, and PILC/PICAS Transitional Joints.

The course reflects national standards and industry best practices and is fully accredited in line with regulations. In addition, choose to learn with Citrus, and delegates will benefit from our custom-built training facilities and customer-first approach.

Our occupationally and technically-experienced trainers coach delegates on this course in the Jointing School, completing the session with a practical observation and short answer question paper. They must pass the assessment to qualify for the Citrus certificate of attendance, valid for three years.  

Once delegates have the certificate of attendance, this then allows them to work under personal supervision until they complete their trade test or authorisation assessment.

Course Programme

Delegates taking this High Voltage Jointing 11KV (DNO) qualification will cover knowledge, skills and operating practice.

Course content includes:

  • Jointing practices and procedures 
  • Health and Safety regulations and legislation relating to electrical work     
  • Control of Substances Hazardous to Health (COSHH)  
  • Appropriate PPE for high voltage Jointing  
  • Task instructions
  • Risk assessments for electrical works
  • Jointing old and new cables
  • Different permit types and allowances  
  • Using a Spiking Gun and other high voltage specific tools
On Completion

Upon successfully completing this qualification, delegates will be able to:

  • Complete 11KV Joints on new Triplex Cables and old PILC-PICAS Cables
  • Carry out Transitional Jointing for both new Triplex Cables and old PILC-PICAS Cables
  • Follow Jointing practices and procedures
  • Successfully take a trade test with one of the six UK companies that work on the Distribution Electricity Networks
Who Should Attend?

This Citrus High Voltage Jointing qualification is for delegates looking to work within the High Voltage Electrical Industry. It’s for new entrants as well as experienced cable operators looking to upskill or add additional qualifications to their competency.

Course Duration

Delegates take this comprehensive training over 10 days.

Why Citrus?

We dedicate our efforts to unrivalled quality and the customer experience at Citrus Training. As a result, we are the leading UK-based provider of health, safety and technical training and assessment services to the Built Environment and Utility sectors. 

Citrus Training serves 85 of the top 100 building services companies in the market. With over 20 years of collective experience, we offer advice and guidance for new and experienced entrants looking to work within the IDNO/DNO industry. 

Our Electrical training is accredited, regulated, and of an exceptionally high standard. Delivered by our Electrical Safety trainers and DNO Trained Assessors, they also carry out competency pre-assessment and testing to work on IDNOs and DNOs. 

Finally, we teach and promote current industry and legislative requirements to ensure delegates take them forward into their daily working lives, delivering courses at our nationwide, industry-leading and accredited training centres to offer the very best of training standards and quality assurance. 

Things You Need to Know

If you are looking to obtain DNO Competancy it may benefit if you hold any of the following:

  • First Aid 
  • Manual Handling 
  • New Roads and Street Works Units 1-3 card 
  • A knowledge of working in the electrical industry, i.e. LV Jointers, Domestic Electrician, Jointers Linemans or Fitters Mate.

Delegates must be 18 or over. Before starting the course, they must inform their trainer of any special considerations, medication or physical restrictions that may cause difficulties in any part of the training.

National Coverage

Over 100+ training centres nationwide, with 150+ technical trainers, delivering upwards of 250+ courses to over 40,000+ delegates each year. Thats why we're the UK's trusted training provider.

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