The C&G 2391 (Inspection and Testing of Electrical Installations) is the qualification that enables you to carry out periodic inspection and testing of existing electrical installations and issue EICRs (Electrical Installation Condition Reports). It is effectively essential for any electrician who wants to carry out inspection work or register with a competent person scheme.
What it covers: The correct testing sequence from IET Guidance Note 3, use of test instruments (continuity, insulation resistance, loop impedance, RCD testing), interpretation of test results, identification and classification of defects using observation codes (C1, C2, C3, FI), completion of EICs and EICRs, and the legal and regulatory framework for inspection and testing.
Assessment: Written exams plus a practical assessment where you must carry out a full inspection and test on a real installation, record the results, and produce a completed EICR or EIC. The practical assessment is demanding — you must demonstrate that you can test correctly, interpret results accurately, and complete the documentation properly.
Why it matters: The 2391 is required for competent person scheme registration (NICEIC, NAPIT, ELECSA), which is needed to self-certify notifiable electrical work under Part P. It is also required to carry out periodic inspection work, which is a significant revenue stream — landlords in England must have an EICR every 5 years, and all commercial properties need periodic inspections at the intervals specified in GN3.
Duration: Typically 1 to 2 weeks of study plus the practical assessment. Most candidates prepare using a combination of classroom training and self-study.