2391 Periodic Inspection & Testing

The Periodic Inspection Testing course delivered by experienced engineers leading to the City & Guilds Level 3: the Certificate for the Fundamental Inspection, Testing and Initial Verification of Electrical Installations Training Course, City and Guilds 2391-52.

The Institute of Engineering Technology (IET) wiring regulations are the definitive standards for the electrical industry for the installation, safe use and operation of electrical equipment and systems. The City & Guilds scheme, 2391-52 is aimed at practising electricians with relevant experience who have passed the latest edition wiring regulations course, City & Guilds 2382 and who are able to carry out the required tests on electrical installations.


To take this course, candidates must provide proof of their 17th or 18th Edition Wiring Regulations certificate.

What you'll learn

The course syllabus is as follows:

a) Practical competence
Selection and testing of instruments
Completing inspection reports
Carrying out initial and periodic inspections

b) Preparation for Inspection and Testing
The legal framework and guidance notes

c) Inspection
Items to be checked
BS 7671 requirements
The extent and limitation of a Periodic Inspection report
The requirements for safety

d) Testing
Protective conductors
Ring Circuits
Insulation Resistance
Penetration and flashover
Electrical separation
Special installations and locations
The IP Code
Earth Fault Loop impedance
Earth Electrodes
Residual circuit devices
Prospective fault current

e) Initial Verification
Candidates carry out specific practical assessments on a simulated test rig designed for the purpose. Candidates have to satisfy all the performance criteria and observe the correct health and safety procedures.
Assessment 1 – Installation Inspection
Assessment 2 – Insulation resistance test
Assessment 3 – Phase Earth loop impedance test
Assessment 4 – Tests required by the Initial and Periodic Inspection report
Protective conductors
iRing final circuit and CPC
Insulation resistance
Socket outlets
Lighting circuits
Motor Starters
Earth Fault Loop impedance
Consumer unit
Socket outlets
Motor Starters
RCD circuits
RCD Operation
Prospective Short Circuit and Earth Fault current
At origin
At remote point
Functional testing

The full tuition programme comprises:-

  • The requirements of BS 7671 for inspection, testing and certification,
    • Guidance given in IET Guidance Note 3, Inspection & Testing
  • Practical demonstrations and practical testing sessions
  • Preparation for the practical assessments and written/on-line examinations
  • A written exam and on-line multiple choice exam
  • A practical assessment

Course Objective

This course is suitable for those who are suitably qualified and practising electricians or engineers whose job requires them to carry out electrical testing on electrical installations.


Time frame

4 day course.


Map of IPS Rochester IPS International Northbank House
Sir Thomas Longley Road

additional information

To take this course, candidates must provide proof of their 17th or 18th Edition Wiring Regulations certificate.

You will need to book this course for six weeks in advance of the course due to pre-course reading that will be provided to you when booking.

Please bring supplied IPS memory stick and own laptop if you wish.