Is this course for you?

This course is for engineers currently practising as an Authorised Person (AP) with respect to high/low voltage (HV/LV) distribution equipment at MoD establishments.


The course will refresh existing AP’s on HV electrical systems and the dangers which exist and can arise when operating and working on HV systems.

You will also be refreshed on the required knowledge to issue safety documentation in compliance with current HSE legislation and to JSP 375 Volume 3 Chapter 3.


By the end of the course you will be able to:

  • Understand statutory safety regulations relating to HV/LV safe working practices
  • Follow procedures defined by JSP 375 Volume Chapter 3
  • Issue and cancel a permit to work/sanction to test
  • Perform cable location and identification
  • Carry out HV pressure testing of cables and vacuum circuit breakers
  • Safely confirm cables dead using a cable spiking gun
  • Understand and operate HV protection systems
  • Practically carry out earthing of switchgear and cables
  • Carry out live HV phasing
  • Complete operating records and documentation
  • Operate and maintain HV/LV switchgear

You need to complete a refresher course every 3 years to retain current AP appointment.


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Classrooms are available for theory learning and group exercises (close to training laboratories when practice activities are included).

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HV facility

We have extensive High Voltage training facilities for both the healthcare and commercial sectors with an emphasis on practical training.