A landlord may have a current EICR and still own a faulty kettle. Equally, a business can have recently PAT-tested equipment while a damaged circuit or overloaded consumer unit remains a serious risk. This is the essential distinction in EICR versus PAT testing: both support electrical safety, but they examine different parts of an electrical system.

For homeowners, landlords and commercial operators in London, knowing the difference helps you arrange the right inspection, meet your responsibilities and avoid spending money on checks that do not address the actual risk.

EICR versus PAT testing: the core difference

An Electrical Installation Condition Report, commonly called an EICR, assesses the fixed electrical installation in a property. This includes the consumer unit, wiring, sockets, light fittings, switches, earthing and fixed equipment such as electric showers or hard-wired heating controls.

Portable Appliance Testing, or PAT testing, concerns electrical appliances that plug into a socket or are connected by a flexible cable. Typical examples include kettles, microwaves, computers, extension leads, printers, lamps, power tools and portable heaters.

Put simply, an EICR checks whether the electrical infrastructure of the building is safe and in satisfactory condition. PAT testing checks whether individual electrical appliances are safe to use. One does not replace the other.

What happens during an EICR?

An EICR is a detailed inspection and test of an installation carried out by a competent electrician. The work usually involves checking the condition of accessible electrical components, identifying signs of wear, damage, poor workmanship or previous unsafe alterations, and carrying out electrical tests at the consumer unit and circuits.

The electrician will assess whether protective devices operate correctly, whether the earthing and bonding arrangements are adequate, and whether circuits are suitable for their intended use. They will also look for issues such as overloaded circuits, damaged accessories, inadequate protection against electric shock and fire risks caused by ageing wiring.

The final report records the installation’s condition. Observations may be coded as C1 for danger present, C2 for a potentially dangerous condition, FI where further investigation is required without delay, or C3 for an improvement that is recommended but does not make the report unsatisfactory on its own.

If C1, C2 or FI observations are present, the report is normally unsatisfactory until the necessary remedial work or investigation has been completed. This is why an EICR is more than a certificate to file away. It is a practical safety assessment that can highlight defects requiring prompt action.

When is an EICR needed?

In England, private landlords must ensure that the electrical installation in a rented property is inspected and tested at least every five years, or sooner if the report recommends it. A copy of the report must also be provided to tenants within the required timescales.

For owner-occupied homes, there is no equivalent routine legal requirement in most circumstances, but periodic inspection remains sensible. It is particularly worthwhile when buying an older property, after major renovation work, before letting a home, or where there are recurring electrical issues such as tripping circuits, flickering lights or burning smells.

Commercial premises have a duty to maintain electrical systems so they are safe. The appropriate EICR interval depends on the environment, the type of installation and how it is used. A busy shop, office, workshop, communal area or hospitality venue may need a different inspection programme from a low-use residential property. A qualified electrician can advise on a suitable interval based on risk rather than applying a one-size-fits-all approach.

What happens during PAT testing?

PAT testing starts with a visual inspection, which is often the most valuable part of the process. The person carrying out the test checks the plug, cable, casing and fuse for obvious damage, loose connections, overheating, unsafe repairs or signs that an appliance has been misused.

Where appropriate, electrical tests are then carried out using specialist equipment. Depending on the appliance’s class and construction, these may include earth continuity, insulation resistance and polarity checks. The appliance is then recorded as passed or failed, often with an asset number and label to support future maintenance.

Not every appliance needs the same test, and not every item with a plug is tested in the same way. Double-insulated appliances, IT equipment and sensitive electronic equipment can require different procedures. A competent tester will select a method that is suitable for the item rather than carrying out unnecessary testing that could disrupt equipment or produce misleading results.

Is PAT testing a legal requirement?

There is no law stating that every appliance must receive a PAT test at a fixed annual interval. However, landlords and employers have duties to keep electrical equipment safe. PAT testing is a recognised way to help demonstrate that reasonable precautions and maintenance arrangements are in place.

The right frequency depends on risk. A power tool used daily on a construction site needs closer attention than a desktop monitor in a carefully managed office. Equipment in a rented flat may need inspection between tenancies or after damage is reported, while appliances in a hotel, kitchen or public-facing workplace may need more frequent checks due to heavy use.

A pass label should never be treated as a guarantee of safety until the next test date. Cables can be crushed, plugs can be damaged and appliances can develop faults at any time. Users should still report damaged equipment immediately and remove it from use where there is any concern.

When do you need both checks?

Many properties benefit from both, especially where responsibility extends beyond a single household. A landlord may need an EICR for the fixed installation and a sensible programme for inspecting supplied appliances, such as washing machines, fridge freezers, lamps and microwaves. The EICR does not test those appliances simply because they are plugged into sockets.

Businesses often need both services as part of planned maintenance. The EICR helps confirm the building’s circuits and protective measures are in good order. PAT testing helps manage the risks created by the equipment employees use every day, including extension leads and chargers that are easily damaged or moved between work areas.

For homeowners, PAT testing is generally less formal unless appliances are used for business, provided to tenants or regularly exposed to demanding conditions. However, a visual check of leads and plugs is always worthwhile, particularly before using high-load items such as heaters, power tools or extension reels.

Common misconceptions that can leave gaps in safety

One common mistake is assuming an EICR covers everything electrical in a property. It does not normally include portable appliances connected by plugs, nor does it replace maintenance of specialist systems that require their own checks.

Another is treating PAT testing as a substitute for investigating repeated tripping. If a circuit keeps tripping, the cause may be a faulty appliance, but it could also be a wiring fault, moisture ingress, an overloaded circuit or a problem with the consumer unit. The fault needs proper diagnosis rather than repeated resetting.

It is also unwise to choose inspection intervals purely because “that is what we have always done”. A tailored plan considers the age and condition of the property, the type of occupants or staff, how equipment is used, and whether previous faults have been found.

Choosing the right electrical inspection

Start by considering what you need checked. If your concern is wiring, sockets, consumer units, fixed lighting or landlord installation compliance, arrange an EICR. If the concern is plug-in equipment, damaged cables or workplace appliance records, PAT testing is the relevant service. If you manage a rental portfolio, office, retail unit or mixed-use building, both may be appropriate.

Always use a competent, properly qualified electrician or tester who can explain the findings clearly. A useful report should identify the location and nature of faults, set out what action is needed and give you a clear record for tenants, staff, insurers or property files.

Where an inspection identifies immediate danger, such as exposed live parts, burning marks, electric shocks or persistent tripping, stop using the affected circuit or appliance and seek urgent professional help. EDL Electrical provides certified electrical inspections and responsive support across London, helping property owners deal with faults correctly rather than taking chances.

The most useful question is not whether you need an EICR or PAT testing, but which electrical risks exist in your property right now. Matching the inspection to those risks is the practical route to safer homes, safer workplaces and fewer unwelcome electrical surprises.