Electrical Safety and PAT Testing at Work: What Employers Need to Know

Portable Appliance Testing, universally known as PAT testing, is one of the most misunderstood areas of workplace compliance — many employers believe there's a fixed legal requirement to test every appliance annually, when in fact the underlying law is far more flexible, and far more focused on risk than on a rigid testing calendar.

The actual legal requirement

Alongside the work equipment duties under PUWER, the Electricity at Work Regulations 1989 require employers to maintain electrical systems and equipment so far as reasonably practicable to prevent danger. This is a general duty, not a specific mandate to PAT test on a fixed schedule. The Health and Safety at Work etc. Act 1974 reinforces this with a broader duty to ensure, so far as reasonably practicable, the health and safety of employees and others affected by work activities — electrical equipment included.

Why PAT testing exists as a practice

PAT testing developed as a practical, standardised way of demonstrating that portable electrical equipment — kettles, laptops, extension leads, power tools — is being properly maintained, even though the law itself doesn't name PAT testing specifically or mandate a set frequency. HSE's own guidance, consistent with the same risk assessment principles that underpin the rest of workplace safety law, is explicit that the frequency of testing, and indeed whether formal testing is needed at all for very low-risk equipment, should be based on a risk assessment rather than a blanket annual rule.

What a risk-based approach actually looks like

A sensible approach considers the type of equipment, how it's used, its age and condition, and the environment it operates in. A laptop charger used at a single desk in an office carries a very different risk profile to a power tool moved between sites on a construction project or used in a wet environment. HSE guidance suggests that simple visual inspection by a trained user, checking for obvious damage to plugs, cables and casings, can be sufficient for lower-risk equipment in benign office environments, with formal combined inspection and testing reserved for higher-risk equipment or environments.

Building a proportionate electrical safety programme

A defensible programme typically combines regular user checks (a quick visual inspection before use), periodic formal visual inspections by someone with a bit more training, and combined inspection and testing at intervals set by the risk assessment rather than an arbitrary calendar date. Records of what's been checked, when, and by whom help demonstrate compliance if the HSE or an insurer ever asks — and insurers sometimes impose their own testing expectations as a condition of cover, separate from the strict legal minimum.

Fixed wiring versus portable appliances

PAT testing only covers portable and moveable equipment. Fixed electrical installations — the wiring, distribution boards and sockets built into a building — fall under a separate inspection regime, typically an Electrical Installation Condition Report carried out by a qualified electrician at intervals recommended by the relevant British Standard, commonly every five years for commercial premises, though this too depends on the type and use of the building.

Who can carry out PAT testing

There's no legal requirement for a PAT tester to hold a specific formal qualification, but they must be competent to do the job — understanding the equipment, the test procedures, and how to interpret the results. Many employers use a trained in-house employee for simpler equipment and bring in a qualified contractor for more complex or higher-risk items.

Getting the balance right

The risk of over-testing is often overlooked: needlessly formal testing of very low-risk equipment wastes money and staff time without improving safety, while under-testing genuinely hazardous equipment creates real exposure. A written rationale explaining why a particular testing interval was chosen for a given category of equipment is often more valuable during an HSE inspection or insurance review than a certificate showing testing was carried out to an arbitrary annual schedule without any underlying reasoning.

Employers should also keep in mind that electrical safety duties extend beyond office equipment to items brought in by contractors or visitors, and to equipment used at temporary or off-site locations. A simple policy requiring visiting contractors to demonstrate their own equipment has been appropriately maintained closes a gap that's easy to overlook when attention is focused only on equipment the organisation owns directly.

Frequently asked questions

Is PAT testing a legal requirement in the UK? There's no law that names PAT testing specifically or sets a fixed frequency; the legal duty is to maintain electrical equipment safely, and PAT testing is simply a widely used method of demonstrating that.

How often should PAT testing be done? It depends on the equipment and environment — HSE guidance points to a risk-based interval rather than a universal annual rule, with lower-risk office equipment often needing testing far less frequently than high-risk or heavily used equipment.

Does a laptop charger need annual PAT testing? Not necessarily — low-risk equipment in a benign office environment may only need regular visual checks, based on the outcome of a risk assessment.

What's the difference between PAT testing and an EICR? PAT testing covers portable appliances; an Electrical Installation Condition Report covers the fixed wiring and electrical installation within a building.