PAT Testing FAQ
Answers to the most common questions about PAT testing
If you can't find the answer you need, our team is always happy to help. Call us on 01376 339 372 or send us a message.
Legal & Compliance
Is PAT testing a legal requirement?
PAT testing itself is not directly required by a single piece of legislation. However, the Electricity at Work Regulations 1989 require employers to ensure that all electrical equipment is maintained in a safe condition. PAT testing is the widely accepted method of demonstrating compliance with this obligation, and is expected by insurers and HSE inspectors.
What happens if I don't have PAT testing done?
If an incident occurs and you cannot demonstrate that your electrical equipment was maintained safely, you could face HSE prosecution, fines, invalidated insurance claims, and civil liability. In the worst case, unsafe electrical equipment causes fires, injuries, or deaths — the legal and human consequences of which can be severe.
Do I need PAT testing if I'm a sole trader working from home?
If you're employed by yourself and use electrical equipment in a workplace (including a home office used for business), you should consider whether your equipment is safe. The regulations technically apply to employers, but professional indemnity and business insurance policies often require evidence of electrical safety. It's also simply good practice.
Is PAT testing required for rental properties?
Landlords have a legal duty to ensure that all electrical appliances they supply with a tenancy are safe. While a specific PAT testing law for landlords doesn't exist, the Landlord and Tenant Act 1985 and Housing Act 2004 create obligations around appliance safety. Many local authorities require PAT testing as part of HMO licensing.
Will Ofsted check PAT testing records in schools?
Ofsted inspectors may ask about health and safety management in schools, which includes electrical safety. While they don't specifically check individual PAT certificates, having a clear compliance record demonstrates good premises management, which is assessed as part of overall leadership and management.
Testing Frequency
How often should PAT testing be done?
Testing frequency depends on the type of equipment and the environment. Standard office equipment is typically tested annually. Kitchen and catering equipment annually. Construction and industrial power tools every 3–6 months. The IET Code of Practice provides detailed guidance on recommended testing intervals based on appliance class and environment.
Can I choose my own testing frequency?
Yes — testing frequency should be based on a risk assessment specific to your premises and equipment. A reputable PAT testing company (including MES PAT Testing Ltd) can advise on appropriate frequencies based on the equipment types and conditions in your specific business.
Does all equipment need to be tested at the same time?
No — you can stagger testing so that high-risk equipment (such as power tools) is tested more frequently while lower-risk office equipment is tested annually. Your test records and appliance labels will show individual retest dates for each item.
The Testing Process
What does a PAT test involve?
A PAT test consists of two stages: a visual inspection (checking for damaged cables, cracked plugs, burn marks, and other visible defects) and an electrical test using a calibrated PAT tester. The electrical test measures insulation resistance, earth continuity, and other parameters to identify hidden faults. Some appliances (such as double-insulated Class II equipment) require fewer electrical tests than earthed Class I equipment.
How long does PAT testing take?
Testing speed depends on the number and type of appliances. As a general guide, our engineers test 50–100 standard appliances per hour. We can provide an estimated visit duration when you contact us with your appliance count.
Do appliances need to be switched off for testing?
Most appliances should be switched off (but can remain plugged in) for testing. For desktop computers in offices, we ask that users save their work but can leave machines powered on — our engineers work around this. For kitchen appliances such as fridges and freezers, brief disconnection for testing is necessary.
What equipment do your engineers use?
Our engineers use professional-grade, calibrated PAT testing instruments. All equipment is regularly calibrated and certified to ensure accurate, legally valid test results.
Pass & Fail
What happens if an appliance fails a PAT test?
Failed appliances are immediately labelled with a red FAIL sticker and must be removed from service. Our engineer will explain the reason for failure and, where possible, advise whether the fault is repairable. Failed appliances should not be used until they have been repaired and retested.
What are common reasons for PAT test failure?
Common failure causes include: damaged or fraying cables, cracked or damaged plugs, incorrect fuse rating, poor earth continuity (especially in metal-bodied appliances), low insulation resistance indicating degraded insulation, burn marks or signs of overheating, and liquid damage.
Can a failed appliance be repaired and retested?
Yes — many common failures (such as damaged cables, wrong fuses, or faulty plugs) are inexpensive to repair. After any repair, the appliance must be retested before being returned to service. We can carry out retest visits for repaired equipment.
Costs & Booking
How much does PAT testing cost?
PAT testing costs vary based on the number of appliances, location, and scheduling requirements. Typical costs range from £1–£3 per appliance for standard commercial testing, with minimum call-out charges for small jobs. All our quotes are inclusive of testing, appliance labels, and digital certificates — no hidden extras.
Can you test outside normal business hours?
Yes — we offer early morning, evening, weekend, and bank holiday appointments to minimise disruption to your business. Out-of-hours appointments are priced individually — please enquire when booking.
How quickly can you visit?
In most areas of Essex, we can offer same-day or next-day appointments. For London and other areas, 2–3 days is typical for standard bookings. Urgent or emergency visits can often be arranged with shorter notice — call us directly on 01376 339 372.
Do you offer annual contracts or repeat bookings?
Yes — many of our clients use us on an annual contract basis, which includes automatic scheduling reminders and priority booking. Annual contracts also often attract better per-appliance rates. Ask us about contract options when you enquire.
Certificates & Records
What documentation do you provide after testing?
After every visit, we provide: a comprehensive test report listing every appliance tested with individual results, digital certificates emailed the same day, appliance labels (pass/fail stickers applied to each item), and access to your records through our secure online portal.
How long are PAT certificates valid?
There is no fixed legal validity period for PAT certificates. The retest date on each appliance label indicates when that appliance is next due for testing based on risk assessment. It is best practice to retest at the recommended interval shown on the label and in your test report.
Can I get copies of historical test records?
Yes — all test records are stored securely in our digital portal and can be retrieved at any time. Previous test certificates can be reissued on request.
Still Have Questions?
Our friendly team is always happy to answer any questions about PAT testing requirements for your specific business or premises.
