What Does PAT Cover at Work and in Managed Premises?
A kettle with a damaged flex, a laptop charger running unusually hot, or an extension lead hidden beneath a desk can all create a real safety issue long before a fuse blows. So, what does PAT cover? Proper Portable Appliance Testing covers far more than applying a pass or fail sticker. It is a documented process for identifying electrical risks in appliances, leads and accessories used in workplaces and managed premises.
For duty-holders, the value lies in knowing what is on site, whether it is safe to use, what needs attention and what evidence supports your safety controls. The precise scope should reflect the premises, the people using the equipment and the way appliances are used.
What does PAT cover in practice?
PAT testing normally begins with an asset-by-asset formal visual inspection, followed by electrical tests where they are suitable for that class of appliance. Each item should be identified, labelled and recorded, with the result and any observations retained in a clear report.
The process can cover everyday workplace equipment such as computer monitors, desktop PCs, docking stations, printers, photocopiers, kettles, microwaves, fans, vacuum cleaners, power tools, chargers and portable heaters. It also includes the items that often attract less attention but carry significant risk: extension leads, multiway adaptors, cable reels, IEC leads, phone chargers and power supplies.
In managed accommodation, holiday homes, schools, care settings and rented offices, the list may extend to guest appliances, kitchen equipment, cleaning equipment, display equipment and staff-owned items permitted for use on the premises. The important question is not whether an item looks expensive or new. It is whether it is electrically powered, portable or movable, accessible to users and capable of causing electric shock, burns or fire if it develops a fault.
Formal visual inspection: the first safety check
A substantial proportion of faults can be found without switching on a tester. A formal visual inspection examines the appliance, plug, cable and accessible parts for signs that it is not safe to remain in service.
This includes damaged or taped cables, cracked plugs, loose pins, exposed conductors, burn marks, inadequate cable grips, overloaded adaptors, incorrect fuses and signs of liquid ingress. Engineers should also look for overheating around plugs, sockets and chargers, as well as poor positioning that may crush a lead, restrict ventilation or place equipment close to combustible material.
Unsafe use practices matter as much as a single test result. A perfectly serviceable extension lead can become hazardous when daisy-chained with other leads, trapped in a doorway or used to power equipment beyond its intended load. Similarly, portable heaters and fan heaters require particular care because of their heat output, condition and location.
A thorough inspection also provides an opportunity to identify products that warrant closer scrutiny. This can include known manufacturer fire or electric-shock recalls, counterfeit or lookalike goods, and products identified as unsafe by consumer safety investigations. A basic sticker-only service is unlikely to provide that level of vigilance.
The electrical tests PAT may include
After the visual inspection, an appropriate tester can carry out measurements that help identify faults not visible from the outside. The tests selected depend on the appliance's construction and electrical class. Testing every item in exactly the same way is neither practical nor safe.
For Class I appliances, which rely on an earth connection for protection, testing can include earth continuity to confirm the protective conductor is intact. Insulation resistance testing checks whether insulation is adequately preventing current from escaping to accessible metal parts. Where appropriate, leakage testing may be used to assess whether current is escaping at an unsafe level during operation.
Class II appliances are double insulated and do not rely on an earth connection. They require a different approach, typically focusing on insulation or leakage tests alongside the visual inspection. Battery-operated equipment, low-voltage devices and certain electronic equipment may need specific test methods or visual assessment to avoid damage and produce meaningful results.
A competent PAT engineer does not force a test merely to obtain a reading. Sensitive IT equipment, surge-protected leads, equipment with electronic controls and appliances without a conventional plug all need judgement. The objective is reliable evidence of safety, not a convenient number on a printout.
Asset labels, certificates and records are part of the cover
A compliant approach is not complete when an item passes a test. Each appliance should receive a durable asset label showing its unique identification, test status and the next review date where applicable. This allows staff and managers to match equipment with the asset register and quickly identify items that must not be used.
The accompanying certificate and detailed PDF report should show what has been tested, where it was located, its result and any observations or remedial actions. A well-managed register provides an auditable record for insurers, health and safety reviews, client audits and internal inspections.
At Electrotech Services, every tested item can be registered in PatGuard3 asset-management software. This creates a usable equipment record rather than a pile of disconnected certificates. For facilities managers with multiple rooms, sites or frequent equipment changes, that visibility can save considerable time when reviewing what is due, failed or removed from service.
What PAT testing does not cover
PAT testing is an important control, but it is not a substitute for all electrical safety duties. It does not replace inspection and testing of the fixed electrical installation, which is addressed through an Electrical Installation Condition Report. Building wiring, consumer units, fixed socket outlets and fixed circuits require a different inspection regime.
It also does not remove the need for staff to carry out simple user checks. Users should report frayed leads, damaged plugs, intermittent operation, burning smells, heat, cracks and loose parts immediately. A fault can develop the day after an appliance is tested, so safety cannot rely on an annual visit alone.
Nor does PAT provide a universal legal deadline. There is no single rule requiring every appliance to be tested every year. The Electricity at Work Regulations require systems to be maintained so far as reasonably practicable to prevent danger. The appropriate inspection and test frequency depends on risk.
A low-use double-insulated monitor in a supervised office may need a different interval from a power tool in a workshop, a cleaning appliance in shared accommodation or a kitchen appliance used daily by many people. Equipment that is moved frequently, used by the public, exposed to damage or operated in harsher conditions normally justifies closer attention.
From failed item to practical action
When an appliance fails, the immediate priority is to prevent use. It should be clearly labelled, removed from service or isolated as appropriate. The report should explain why it failed, whether repair is sensible and what action is needed before it returns to use.
Some faults are straightforward, such as replacing a damaged lead or fitting the correct fuse. Others point to a wider problem: repeated overheating chargers may indicate unsuitable purchasing controls, while several overloaded adaptors may show that the workspace does not have enough accessible sockets. These findings can inform risk-assessment actions rather than becoming a list of isolated failures.
For premises with staff teams, a short workshop on user checks and formal visual inspections can strengthen the system between PAT visits. It gives people practical confidence to recognise a damaged cable, an unsafe adaptor or a recalled product before somebody is injured or a small fault becomes a fire.
The most useful PAT programme is one that reflects how your premises actually operate. Keep a current asset record, act promptly on failures and give particular attention to equipment that gets hot, moves often or is used by visitors, guests or vulnerable people. That is how appliance testing becomes a working safety control, not just a label on a plug.
