In Part 6 Chapter 62 of the 17th Edition BS 7671 we find guidance on completing a periodic inspection and test on an existing electrical installation.
Section 621: 621.1contains the where, why and 621.2 to 612.4 is all of the whats and the who is mentioned in 621.5
Section 622: 622.1 relates to the frequency of periodic inspection and testing, but you’re better off with a copy of Guidance Note 3. 622.2 gives an instance where periodic inspection and testing may not be necessary.
Chapter 63 is all about the Certificates or Reports used
It’s worth remembering that with a Periodic Inspection and Test you are compiling a report on the condition of an existing electrical installation (Electrical Installation Condition Report) 631.2 and are not certifying the compliance anything.
634.1 Along with the Electrical Installation Condition Report you will need to provide a Schedule of Inspection and a Schedule of test results
634.2 Reporting of damage, deterioration, defects, dangerous conditions and non-compliance etc must be recorded. This is done through the use of ‘observation classification codes’…
C1: Danger present. Risk of injury. Immediate remedial action required
C2: Potentially dangerous. Urgent remedial action required.
C3: Improvement recommended
FI: Further Investigation required without delay
The periodic inspection report must contain all of the information contained in the model forms in Appendix 6 of BS 7671: Electrical Installation Condition Report, Condition Report Inspection Schedule and Schedule of Test Results.
See BS7671 and Guidance Note 3 for more details.