Course Overview

Learn to perform an initial inspection of electrical installations with this fully accredited City and Guilds Level 3 training course.

This course is recommended for practising electricians who are yet to perform an initial inspection on electrical installations, or those with previous experience in this field looking for an update on their previous training. The City and Guilds 2391-50 Initial Verification course is also suitable for those entering the industry from other disciplines (for example other engineering fields, or those who have been working in allied trades).

Upon completion of this course, you will be fully prepared for completing initial verification on electrical installation work.

Important Course Details

    5 days
    We will be running the City and Guilds 2391-50 Initial Verification course at our Watford, London and Stockton-On-Tees, Teesside electrical training venues.
    Although there are no formal qualifications required for this electrical verification course, it is expected that you should have a good knowledge and understanding of electrical science and principles. Previous experience of electrical installation work, either within the electrical contracting industry or an allied trade is essential.
    It is best suited to those who are working within the electrical industry and are actively involved with the inspection and testing process with previous experience of live boards. It is also useful for you to have an understanding of 3 phase systems.

    There is a very small element of practice, however, no formal practical training will be provided.

    You should also have a good understanding of the latest IET Wiring Regulations BS7671 and an up-to-date 18th Edition certificate.

    In summary, this course is designed for those who want to progress their testing and inspection skills. Therefore, a good understanding of the fundamentals is essential. It is strongly suggested that you have 2 years experience working with inspection and testing as a practising electrician before taking this course.

    If you have no previous training or experience or need a refresher then the City and Guilds 2392-10 Fundamentals and Initial verification (Level 2) course contains both practical and theory and is good practice before progressing to the City & Guilds 2391 level 3 courses.

    Please call our training team for more information if you are concerned about your eligibility.

    This course will include a multiple-choice examination (40 questions – 80 minutes), a short answer test (1 hour) and a practical test (2 hours).

City and Guilds 2391-50 is a theory-based course; taught by our experienced, friendly and helpful electrical training tutors. We will guide you through all of the modules and prepare you as much as possible for the examinations and practical assignments that you will have to complete at the end of the course. We try at all times to keep our training groups small, to ensure that you get plenty of one-on-one time with our tutors, and ensure that all of your questions are answered.

    Those who successfully complete with course will receive a City & Guilds 2391-50 Level 3 Award in Initial Verification.


Section 1 – Understanding the Requirements for Initial Verification of Electrical Installations

This section incorporates the following:

  • Statutory and Non-Statutory Documents – including Design, Construction and Inspection & Testing
  • Certificating Documents – including an electrical installation certificate, schedule of inspections, schedule of test results, a minor electrical installation works certificate (in relation to new circuits and alterations/additions to existing circuits
  • Signatories – including Design, Construction and Inspection/Testing

At the conclusion of this section, you should be able to:

  • State situations that require initial verification
  • State the purpose of initial verification
  • Identify the statutory and non-statutor documents that effect the initial verification process
  • Identify information required by an inspector in order to carry out initial verification in accordance with BS 7671/GN 3
  • Describe the purpose of certificating documents and the requirements for recording and retention in accordance with BS 7671
  • Define the responsibilites of the relevant signatories in relation to certification

Section 2 – Understanding Safety Management Procedures when Undertaking Initial Verification

This section incorporates the following:

  • Health and Safety Requirements – working in accordance with risk assessments/permits to work/method statements, safe use of tools and equipment, safe and correct use of measuring instruments, provision and use of appropriate PPE and reporting of unsafe situations
  • Requirements – in terms of those carrying out the work and those using premises during the inspection
  • Implications – in relation to the inspector, other personnel, customer/clients, the general public and building systems (removal of supply)

At the conclusion of this section, you should be able to:

  • Identify health and safety requirements that apply when carrying out initial verification
  • Outline the relevant requirements of the Electricity at Work Regulations (EWR) for safe
    inspection and testing of electrical installation
  • Describe the procedure for completing safe isolation in accordance with HSE guidance
  • Explain why safe isolation is carried out for the protection of the inspector and other
  • Identify the implications of not carrying out safe isolation

Section 3 – Understanding the Requirements for the Initial Inspection of an Electrical Installation

This section incorporates the following:

  • Items to be Inspected – schedule of inspections in BS 7671 (domestic or similar up to 100A)

At the conclusion of this section, you should be able to:

  • State why inspection is carried out before testing
  • Identify the items to be inspected during initial verification in accordance with the schedule
    of inspections for new installations
  • Explain how the items on the Schedule of Inspections would be verified
  • Describe the appropriate human sense required for a particular inspection
  • Describe how to deal with an item that is found unsatisfactory during the inspection process
  • Describe how the IP classification system is used for electrical equipment

Section 4 – Understanding the Requirements for Testing Electrical Installations at Initial Verification

This section incorporates the following:

  • Maintenence – including regular checks, calibration and checks before use
  • Testing – continuity of protective conductors, continuity of final ring circuits, insulation resistance (to include testing electrically-separated circuits), polarity, earth electrodes, earth fault loop impedance, RCD tests (fault protection and additional protection), prospective fault current, phase sequence, functional testing and voltage drop (using measured conductor resistance method)
  • Factors – including circuit length, temperature effects, parallel conductors, loading and preparation (nulling)

At the conclusion of this section, you should be able to:

  • State the reasons for instruments to be maintained and comply with standards such as BS7671 and GS38
  • Describe the characteristics of instruments and leads used for each test
  • Explain why there is a recommended test sequence for initial verification
  • Explain the purpose of each test
  • Describe how each test is carried out
  • Identify factors that affect the result of each test
  • Interpret the result of each test
  • Explain how test results are verified for compliance

Section 5 – Perform Inspection and Testing of Electrical Installations

In this section, you’ll put everything you’ve learned into practice and complete the tests needed to perform inspection/testing on electrical installations.

You will also be expected to complete any relevant documentation as part of the process.

Reading Materials

We highly recommend candidates consider purchasing and studying the following books for the course and bring them along with you:

You can use both these books during examinations on this course.

FAQs about City and Guilds 2391-50

Q – When Will the 2394/95 courses finish?

A – Last registration for City and Guilds’s older courses will be at the end of August 2017 and you will have until August 2018 to complete these courses.

Q – Does this mean the 2394/95 courses will no longer be relevant?

A – No, the 2394 and 2395 courses will remain an acceptable Level 3 qualification. Those already with this qualification do not need to take the new 2391 course(s).

Q – I was unsuccessful with some of the elements of 2394/95, can I still retake this course?

A – Yes, you will have until August 2018 to complete this

Q – Have any of the exams changed for the new courses?

A – The biggest change is that all exams are now open-book. You are now permitted to refer to BS7671 Wiring Regulations and Guidance Note 3 books during the course and examinations

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