Authorising Engineer Appointment

An authorising Engineer is appointed in writing by the Designated Person for the Organisation (Board Level Appointee) to take responsibility for the effective management of current safety guidance. The Person appointed should possess the necessary degree of independence from local management to act within current guidance.

Eta Projects provide Authorising Engineer duties for High Voltage Systems, Low Voltage systems and Water Systems.

Our Authorising Engineer Services include the Department of Health Technical Memorandums HTM.06.02 (Low Voltage), HTM.06.03 (High Voltage) MOD (JSP375) systems and other systems developed specifically for the private sector including Data Centres where Continuity of the electrical infrastructure is critical to business.

Role and duties of the Authorising Engineer

The Authorising Engineer is responsible for implementing, administering, and monitoring the application of current guidance.

The Authorising Engineer’s roles includes.

1 . assess and recommend in writing sufficient Authorised Persons/Responsible Persons to provide the necessary cover for all systems and installations for which management has responsibility.

2. define the exact extent of the systems and installations for which each Authorised Person/Responsible Person is responsible and, where appropriate, any part of the system which is excluded from the Authorised Person/Responsible Persons responsibilities.

3. if necessary, recommend the suspension or cancellation of the appointment of an Authorised Person/Responsible Persons and withdraw the certificate.

4. Maintain a register of all Authorised/Responsible Persons

5. Ensure that candidates for appointment as Authorised/Responsible Persons Satisfy the qualification requirements


Eugene Conroy (Electrical)
Rick Seymour (Electrical)
Geoff Yeomans (Electrical)
1949-2021 RIP
Peter DesForges (Electrical)
Bill Reeves (Electrical)
Karina Jones (Water)



As Authorising Engineers, we also offer other Supportive Technical Services:

Safety Documentation

• The law requires that employers provide Systems of Work that are planned, organised, performed, maintained and revised so as to be, as far as is reasonably practicable, safe and without risk to health. Electrical accidents can occur due to a lack of Safe Systems of Work (SSW) or poorly prepared methods of work.

• Safe Systems of Work are required, where hazards cannot be eliminated and some risk remains. A System of Safe Working on electrical systems is a group of procedures specific to what work is to be carried out.

• When developing Safe Systems of Work, a set of procedures is developed detailing how the work must be carried out step-by-step to minimise the risk of an accident or injury.

• Where there is a risk of serious injury or death, all electrical work should be supported by a detailed documented, “Safe Systems of Work” which is strictly supervised and enforced.

• Safe Systems of Work can reduce or eliminate exposure to electrical hazards. They must be communicated to and understood by the relevant employees.

• Regularly reviews of Safe Systems of Work should be undertaken to ensure that they are strictly complied with and the quality of safety documentation is acceptable.

• If your organisation needs to introduce a Safe System of Work for electrical systems and ensure staff are properly trained in the implementation of the system, contact Eta Projects.

Discrimination Studies

• The purpose of a discrimination study is to show that happens when a fault occurs on an Electrical System.
• The device closest to the fault should operate first leaving the major parts of the system unaffected. This is not always the case and more of the site can be lost causing more down time than necessary.
• The site must be graded prior the Electrical System is being energised for the first time and should be carried out if a new transformer is installed or the Supply Authority settings change.
• Summary of the site Protection scheme in use:

  1. Over current and earth fault.
  2.  Directional Protection.
  3.  Bias Differential.
  4.  Restrictive protection.
  5.  Merz-Price.
  6. Blocking Schemes.
  7. Protection Details:
  8. CT and VT ratings.
  9. Type of relay or fuse.
  10. Settings Current, curve and time.

• Fault level study to determine:

  1. Maximum overcurrent.
  2. Maximum Earth fault.
  3. Generator maximum fault level.
  4. Generator minimum fault level.
  5. Time current curves for each protective device.
  6. Production of tables showing the grading margins.
  7. Summary of site grading.
  8. Recommendation to improve site electrical security.

Partial Discharge Survey

• Partial Discharge is a breakdown at a concentrated area of high voltage insulation.

• Partial Discharge can occur at any point where the electric field strength exceeds the breakdown strength of the insulation material.

• Initially the magnitude of voltage discharges is usually small. However, the discharges cause progressive deterioration of insulation that leads eventually to a short circuit with catastrophic failure of the affected parts.

• It is a requirement of the Health and Safety Executive ‘HSG230 guide, “Keeping Electrical Switchgear Safe’ that “The Duty holder should assess the switchgear and the electrical network to identify any potential risks and problems’.

• Use of the EA Technology specialist award winning UltraTEV Detector², to test for partial discharge addresses this requirement.

• Partial discharge testing is non-intrusive and is undertaken by our highly experienced High Voltage Authorised Persons. For further information or book an appointment, contact Eta Projects

Assessment + Interview Panel

The Electricity at Work Regulations 1989 extends the responsibilities of employers under the Health and Safety at Work Act 1974.

Directors, Managers, and Heads of Services have a duty to ensure that all electrical systems are safe and that only Competent Persons work on such equipment.

Competent Person must be formally appointed and “Authorised” by Management to undertake the duties and responsibilities of operating and managing High Voltage and Low Voltage systems.

With over 20-years’ experience in delivering High Voltage and Low Voltage training and assessment, Eta Projects can undertake the Selection & Assessments/Interviews for HV/LV Authorised Persons (AP’s) .Assessments, undertaken on-site, are tailored to the particular electrical systems. Assessment includes;

• Personal interview with proposed candidate
• Written assessment with section on local knowledge
• Practical exercise on preparation of safety documentation

Note: Authorised Persons must have completed a relevant HV/LV Authorised Person training course and either completed or be about to complete a 1st Aid Resuscitation course.

For further information or to book an appointment, contact Eta Projects




+44 20 7902 8570


Eta Projects Ltd, No 5 C-D Bear Lane, London, SE1 0UH


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