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A clear explanation of the difference between an Electrical Installation Certificate and an Electrical Installation Condition Report.
Two of the most important documents in the UK electrical industry are the Electrical Installation Certificate (EIC) and the Electrical Installation Condition Report (EICR). Despite their similar names, they serve different purposes and are used in different circumstances. Understanding the difference is essential for electricians, property owners, landlords, and anyone involved in buying, selling, or maintaining property.
In simple terms, an EIC is issued for new electrical work, while an EICR is issued for existing electrical installations. There is also a third document — the Minor Electrical Installation Works Certificate — which is used for smaller jobs that do not warrant a full EIC. This guide explains all three documents, when each is used, and who can issue them.
An Electrical Installation Certificate is issued when new electrical work has been carried out and tested. It certifies that the new installation has been designed, constructed, and tested in accordance with BS 7671 (the 18th Edition Wiring Regulations) and is safe to put into service.
An EIC is required whenever new electrical installation work is completed. This includes new builds, complete rewires, new circuits added to an existing installation, and significant alterations to the existing installation. Any work that involves the installation of one or more new circuits requires a full EIC.
An EIC is a detailed document that records comprehensive information about the new installation. It contains three key sections.
The first section records the design details, including the earthing arrangement, the method of protection against electric shock, and the details of the supply (voltage, frequency, prospective fault current, and external earth fault loop impedance). It is signed by the designer of the installation.
The second section covers the construction of the installation and confirms that it has been erected in accordance with the design. It is signed by the person who installed the work.
The third section covers initial verification — the inspection and testing carried out after construction to confirm that the installation is safe. It includes a schedule of test results for every circuit, recording continuity, insulation resistance, earth fault loop impedance, RCD operation, and polarity. It is signed by the person who carried out the testing.
Three Signatures
An EIC requires three signatures: the designer, the installer, and the person who carried out the inspection and testing. In practice, particularly on smaller domestic jobs, all three roles may be performed by the same person — but the EIC still requires all three signatures to confirm that each aspect has been properly addressed.
The inspection and testing section of an EIC must be completed and signed by a person who holds the City & Guilds 2391-52 qualification (or equivalent). The designer must be competent to design electrical installations, and the installer must be competent to carry out the installation work. For notifiable work under Part P of the Building Regulations, the certificate should be issued through a competent person scheme (such as NICEIC or NAPIT) or the work must be signed off by building control.
An Electrical Installation Condition Report is issued after the inspection and testing of an existing electrical installation. Its purpose is to assess the current condition and safety of the installation and to identify any defects, deterioration, or non-compliance with current regulations.
An EICR is required or recommended in the following circumstances.
An EICR records the results of the inspection and testing and provides an overall assessment of whether the installation is satisfactory or unsatisfactory. The report includes details of the supply, earthing arrangement, and the extent and limitations of the inspection. It lists all observations with their classification codes (C1, C2, C3, or FI) and includes a schedule of test results for every circuit tested.
Unlike an EIC, an EICR does not have separate design and construction sections because it relates to an existing installation rather than new work. It has a single signature — the person who carried out the inspection and testing.
An EICR must be issued by a qualified and competent person. This means someone who holds the City & Guilds 2391-52 Inspection and Testing qualification (or equivalent) and has sufficient experience of the type of installation being inspected. For rented properties, the person should ideally be registered with a competent person scheme, although the regulations define a qualified person more broadly.
Key Difference
An EIC certifies that new work is safe. An EICR assesses whether existing work is still safe. The EIC is issued once when work is completed. The EICR is issued periodically to check ongoing condition.
The Minor Electrical Installation Works Certificate is used for small additions or alterations to an existing circuit that do not involve the creation of a new circuit. It is a simplified version of the EIC designed for jobs that are too small to warrant the full certificate but still require documentation.
The Minor Works Certificate is a single-page document that records the description of the work, the circuit details, the method of protection against electric shock, and the test results for the affected circuit. It is signed by the person who carried out the work and testing. It does not require separate design and construction signatures.
If the work involves the installation of a new circuit, a full EIC is required regardless of the size of the job. For example, installing a new dedicated cooker circuit, a new shower circuit, or a new circuit to an outbuilding all require a full EIC. A consumer unit replacement that involves adding new circuits also requires a full EIC for the new circuits. The minor works certificate is only appropriate when working on an existing circuit.
Common Mistake
One of the most common certification errors is using a Minor Works Certificate when a full EIC is required. If you are installing a new circuit — even if it is only a single circuit — you must issue a full EIC. The Minor Works Certificate is only for additions or alterations to existing circuits. Competent person scheme assessors routinely check for this error.
Part P of the Building Regulations for England and Wales requires that certain types of electrical work are notifiable — meaning they must be certified as compliant with the Building Regulations. Notifiable work includes the installation of a new circuit, the replacement of a consumer unit, and work in special locations such as bathrooms and kitchens.
There are two ways to certify notifiable work. The first is through a competent person scheme such as NICEIC or NAPIT. Members of these schemes can self-certify their work and issue a Building Regulations Compliance Certificate alongside the EIC. The second route is to notify the local authority building control department before starting work, who will then arrange for the work to be inspected and certified.
It is important to understand that the EIC and the Building Regulations Certificate are separate documents. The EIC records the technical details of the installation and test results. The Building Regulations Certificate confirms compliance with Part P. Both are required for notifiable work.
To issue any of these electrical certificates, you need the appropriate qualifications. The City & Guilds 2391-52 Inspection and Testing qualification is the key requirement. It covers both initial verification (required for issuing EICs) and periodic inspection and testing (required for issuing EICRs).
The 2391-52 requires the 18th Edition Wiring Regulations (BS 7671) as a prerequisite. Together, these two qualifications demonstrate that you have the knowledge and competence to carry out inspection and testing and to certify the results in accordance with the current regulations.
Related Course
Inspection & Testing (2391)
The 2391 qualifies you to issue EICs, EICRs, and Minor Works Certificates.
Related Course
18th Edition (2382)
The 18th Edition is a prerequisite for the 2391 and is required for all practising electricians.
Browse our City & Guilds accredited courses and take the next step in your electrical career.
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