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CONDITION REPORT CLASSIFICATION CODES
Where a verified observation could be given more than one Classification code,
only the most serious risk should be recorded (code C1 being the most serious risk).

Where a Condition Report contains an observation with a recorded
Classification code C1, code C2 or code FI, it would not be reasonable for
the installation to be assessed as ‘satisfactory’ for continued use.
Examples of applying verified standard codes are shown in Table 2. However, it is
the responsibility of the skilled person(s) (electrically)* carrying out the inspection
and testing to ensure that a Classification code appropriate for the particular
observation is recorded on the Condition Report, and the person(s) signing the
report is fully responsible for ensuring its content and accuracy before it is issued
to the client.
TABLE 2. EXAMPLES OF STANDARD CLASSIFICATION CODES APPLIED TO
OBSERVATIONS
Code Observation
a) Exposed live parts that are accessible to touch, such as where
accessible live conductors have no (or damaged) insulation.
C1
b) Incorrect polarity.
c) Conductive parts that have become live as the result of a fault.
a) A 30/32 A ring final circuit is discontinuous or cross-connected with
another circuit.
b) Separate protective devices in line and neutral conductors (for example,
C2
double-pole fusing).
c) A metallic pipe for gases or flammable liquids, or the metallic pipe
of a water utility supply, being used as the means of earthing.

a) Absence of ‘Safety Electrical Connection – Do Not Remove’ notice.
b) Absence of a notice indicating that the installation has wiring colours to
C3
two versions of BS 7671.
c) Absence of RCD periodic test notice.

It should be noted that the examples listed in
Table 2 are not exhaustive. Further examples of
Classification codes are given in Appendix G of the
NICEIC and ELECSA publication Inspection, Testing
and Certification. Further guidance on Classification
codes can be found in Electrical Safety First’s Best
Practice Guide 4 – Electrical installation condition
reporting: Classification codes for domestic and
similar electrical installations, which is available as a
free download from
www.electricalsafetyfirst.org.uk
* BS 7671 defines a skilled person (electrically) as ‘Person who
possesses, as appropriate to the nature of the electrical work
to be undertaken, adequate education, training and practical
skills, and who is able to perceive risks and avoid hazards
which electricity can create’.

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