Arranging portable appliance testing for the first time can raise practical questions about the engineer’s work and failed items. A professional visit combines a risk-based inspection with appropriate electrical tests, followed by clear records and recommendations.
PAT testing is neither a universal annual ritual nor an Electrical Installation Condition Report. The approach depends on the equipment, its use, environment and previous findings. HSE says no single legal interval applies to every workplace appliance.
This guide covers preparation, the PAT test process, reporting and action after a failure.
What Is PAT Testing?
PAT testing means examining and, where appropriate, electrically testing portable and transportable equipment to determine whether it is safe to use. “Portable” does not necessarily mean small. The relevant question is whether an item can be moved while connected to an electrical supply or is intended to be moved between locations.
Examples may include desktop monitors, extension leads, kettles, vacuum cleaners, power tools, heaters, kitchen equipment, chargers and some machinery accessories. The exact scope should be agreed before the visit because not every item presents the same risk or requires the same test sequence.
A PAT visit normally sits within a wider electrical-safety system. Under Regulation 4 of the Electricity at Work Regulations 1989, electrical systems must be maintained so far as is reasonably practicable to prevent danger. HSE guidance explains that maintenance can involve a combination of user checks, visual inspections and electrical tests rather than one identical procedure for every item.
Is PAT Testing A Legal Requirement In The UK?
There is no blanket UK law requiring every business to arrange an annual PAT test for every appliance. That commonly repeated rule oversimplifies the legal position. The duty is to maintain electrical equipment so it does not present danger; the way a business demonstrates that duty should be proportionate to risk.
Some workplaces will need more formal testing because equipment is heavily used, handled frequently, exposed to damage or operated in harsh conditions. In a low-risk office, a sensible programme may rely heavily on regular user checks and periodic visual inspection, with electrical testing where the risk assessment or previous results justify it.
A landlord, insurer, client, lease, procurement framework or site policy may still require documented PAT testing at a particular interval. That is a contractual or operational requirement, not proof that the same interval applies to every business in law. Managers should record why the chosen approach is suitable and review it when equipment, use or working conditions change.
What Happens Before The Engineer Arrives?
Agree The Scope And Access Arrangements
The provider may ask for an asset list, floor plan, equipment register or site contact. A basic register can include the department, location, description, asset number and whether the item is company-owned, hired or supplied by a tenant. If the business operates across several floors or buildings, agree whether testing will be phased.
Appliances should be available, safely accessible and disconnected only when the engineer or responsible person confirms that it is appropriate. Staff should be told that equipment may be temporarily unavailable. In a kitchen, workshop, warehouse or retail environment, plan around production and customer safety rather than leaving cables across walkways.
Identify Items That Need Special Treatment
Tell the engineer about equipment that contains stored energy, is connected to machinery, must not be switched off without authorisation or needs a manufacturer-specific procedure. Some devices should not be tested in the same way as a simple Class I appliance. A clear pre-visit conversation avoids unsafe assumptions and unnecessary disruption.
| Before the visit | Why it matters |
|---|---|
| Confirm buildings, rooms and equipment categories | Creates a realistic scope and reduces omissions |
| Provide safe access and a site contact | Helps the work proceed without uncontrolled isolation or disruption |
| Identify critical equipment | Prevents inappropriate disconnection or testing |
| Gather previous reports and repair records | Helps set a proportionate inspection approach |
| Tell staff what to expect | Makes it easier to find portable items and manage downtime |
The PAT Testing Process Step By Step
The exact procedure varies by appliance and risk level, but a competent visit commonly follows the stages below.
1. Check The Item’s Identity And Condition
The engineer confirms what the appliance is, where it is used and whether it can be safely inspected. They may compare it with the asset register and check the plug, lead, casing, switches, guards and accessories.
The aim is not simply to attach a tester. Damage such as a cracked casing, loose strain relief, exposed conductor, contamination, overheating mark or non-standard repair may be visible before any electrical measurement is taken. The appliance may need to be removed from service immediately if it presents an obvious danger.
2. Carry Out A Visual Inspection
Visual inspection is a central part of the PAT testing procedure, not a formality to complete after the electrical test. HSE guidance emphasises the importance of looking for damage and signs that equipment is no longer safe in its working environment.
The inspection can include the plug, fuse, cable, cable entry, flex, casing, controls, protective earth connection and signs of misuse. The engineer also considers how the appliance is being used. A cable routed under a door, a portable heater next to combustible materials or a tool used in a damp area may create a risk that a pass result alone cannot remove.
3. Select The Appropriate Electrical Tests
Where electrical testing is justified, the engineer selects tests suitable for the equipment’s construction and class. A Class I item generally relies on a protective earth, while Class II equipment is designed with additional insulation and does not use an earth connection in the same way. Some appliances may be unsuitable for a conventional test or require a more limited approach.
Depending on the equipment, PAT testing equipment may measure protective-conductor continuity, insulation resistance, leakage or other electrical characteristics. The test instrument is only one part of the process. The result must be interpreted alongside the visual condition, manufacturer information, environment and history of the appliance.
This is why a business should not judge the quality of a visit by the number of tests applied to every item. The correct question is whether the inspection and test method was appropriate for the risk and equipment type.
4. Record The Result And Decide On The Next Action
The outcome is normally recorded against an asset identifier or description. A PAT testing report may show the item tested, location, inspection date, result, defects found and recommended action. Some providers also record the test method, instrument information and any remedial work completed.
A “pass” means the appliance met the criteria applied at that inspection. It does not guarantee that the item will remain safe if it is later dropped, overloaded, used outdoors or connected to a damaged extension lead. Conversely, a failed result should be treated as a prompt for controlled action, not as a reason to make an unqualified repair on site.
5. Label, Quarantine Or Repair As Appropriate
Businesses may use labels or another asset-control method to show that an item has been inspected and identify it in the records. A failed appliance should be clearly taken out of use where it presents a danger. Depending on the defect, it may be repaired by a competent person, returned to the supplier or disposed of safely.
Do not continue using a failed appliance simply because the problem appears minor. A loose plug, damaged cable or failed earth path can become more dangerous when the equipment is moved or used under load. Repairs should be followed by appropriate inspection and testing before the item is returned to service.
6. Handover The Documentation And Recommendations
At the end of the visit, the business should receive the agreed report or electronic record, together with a list of failed items and any limitations that affected the inspection. Ask how the records are organised and who is responsible for closing remedial actions.
A PAT test certificate is often used as shorthand for this paperwork, but the important document is an accurate record of what was inspected, what was tested, what was found and what action is required. Keep it with the wider health-and-safety documentation rather than treating it as a standalone badge of compliance.
How Long Does PAT Testing Take?
There is no fixed duration. Time depends on appliance numbers and types, locations, access, condition and whether repairs are needed. A small office may be quick; a warehouse, school or multi-building operation usually takes longer.
An accurate asset list, safe access and advance decisions about critical equipment can reduce disruption. Allow extra time if the visit includes repairs, retesting or detailed reporting.
What If An Appliance Fails PAT Testing?
First, establish the reason for the failure. The issue could be physical damage, a defective plug or lead, inadequate insulation, a failed earth connection, a test limitation or unsafe use. The report should make the recommended action clear without encouraging staff to diagnose or repair electrical equipment themselves.
A responsible process is to:
- Stop using the item if the defect could create danger.
- Identify it clearly and prevent accidental return to service.
- Arrange repair, replacement or further assessment by a competent person.
- Retest or otherwise verify the item before putting it back into use.
- Update the asset register and close the remedial action.
Repeated failures in one department may indicate a wider issue, such as unsuitable extension arrangements, poor storage, water ingress or inadequate user checks. In that situation, repairing individual appliances may not solve the underlying risk.
PAT Testing Is Not The Same As An EICR
PAT testing covers portable or transportable equipment. An EICR assesses the fixed electrical installation, including wiring, distribution equipment and fixed accessories within its agreed scope. One cannot replace the other.
Similarly, PAT testing does not automatically prove that emergency lighting works, that a lightning-protection system is maintained or that a building’s electrical design can support new loads. Businesses may need separate inspection and testing, EICR condition reports, emergency-lighting testing or planned electrical maintenance, depending on the premises and risk assessment.
Choosing A PAT Testing Provider
Look for a provider that asks sensible questions before quoting rather than promising the same test programme for every site. The engineer should be able to explain the proposed scope, access requirements, reporting format, treatment of failed items and any limits on the service.
For businesses in London and the Home Counties, LC Electrical Installations Ltd. provides PAT testing for commercial premises alongside commercial, residential and industrial electrical services. Its wider health-and-safety approach includes site planning, safe isolation and project documentation. Those related capabilities can be useful where portable-appliance findings need to be considered alongside fixed wiring, emergency lighting or other electrical work.
If the site has manufacturing equipment, high-level services or three-phase systems, explain that when requesting a quote. LC Electrical also provides industrial electrical work and commercial electrical work, which may be relevant when PAT findings reveal a broader installation or operational issue.
How To Maintain Safety Between Visits
PAT testing is one control within a continuing maintenance programme. Managers should make it easy for staff to report damaged leads, burning smells, loose plugs, unusual heat, sparking or repeated tripping. Equipment should be used and stored as intended; extension leads should not become a permanent substitute for adequate fixed wiring.
User checks matter after equipment is moved, dropped, contaminated or used in a different environment. HSE recommends matching controls to risk and reviewing them when circumstances change. New machinery, refurbishment or more portable equipment should trigger a review.
Conclusion: Make PAT Testing Part Of A Wider Safety Plan
A professional PAT testing visit is a structured process: the provider agrees the scope, identifies the equipment, carries out a suitable visual inspection, performs appropriate electrical tests where justified, records the outcome and recommends action. The business then remains responsible for controlling failed items, completing repairs and keeping equipment safe between visits.
There is no universal annual rule for every appliance. The strongest approach is a documented, risk-based programme that combines user awareness, visual checks, competent testing where appropriate and timely remedial work. If you are arranging a first visit or reviewing an existing programme, contact LC Electrical to discuss the equipment, premises and documentation you need.
Frequently Asked Questions
Do All Appliances Need To Be PAT Tested?
No. The inspection and testing programme should be based on the risk presented by the equipment, its use and its environment. Some items may need visual checks only, while others justify electrical testing. The decision should be documented and reviewed when conditions change.
Is PAT Testing Required Every Year?
Not automatically. UK law does not set one annual PAT-testing interval for all equipment. A business should choose a proportionate approach based on risk, previous results and the way equipment is used. A lease, insurer or client may impose a separate documented requirement.
What Is The Difference Between A PAT Test Certificate And A PAT Report?
The terms are often used interchangeably. What matters is that the record identifies the equipment, inspection date, outcome, defects, limitations and required actions clearly enough for the business to manage risk and demonstrate what it has done.
Can Staff Carry Out Visual Checks?
In suitable low-risk settings, trained users can carry out basic pre-use checks and report defects. They should not open equipment or attempt electrical repairs unless competent and authorised to do so. HSE guidance supports selecting controls that match the risk and the people undertaking them.