PAT testing: what the law asks for
Testing & Inspection · Full course section in Plus
In Great Britain, electrical equipment used at work must be maintained to prevent danger. HSE explains that the law does not prescribe annual portable-appliance testing for every item. The equipment, its use, the environment and previous findings inform the maintenance approach.
User checks, formal visual inspection and instrument testing have different roles. Damaged flexes, plugs and enclosures can reveal problems before an instrument is connected. Some equipment needs testing, but a test label alone does not prove it is safe today.
Class I equipment relies on protective as part of its protection. Class II uses double or reinforced insulation; it is not assessed as if it must have a Class I protective-earth connection. Choose the method for the actual equipment and manufacturer information.
Records help identify equipment, findings and follow-up action. The portable-equipment unit teaches risk-based , equipment classes, visual inspection, readings and records. It does not award an inspection qualification.
Check HSE’s portable appliance testing guidance for the Great Britain workplace context.
Use findings to improve the maintenance plan
Updated
What to understand before practising
A damaged flex discovered by inspection is useful evidence even without an instrument test. Record the finding, remove unsafe equipment from use where appropriate, and review whether the inspection arrangements match the risk.
Sources
- HSE: portable appliance testing questions — Risk-based equipment maintenance rather than a universal annual testing interval.
This guide is free to read. There is no public quiz specifically for this topic yet. Explore the key terms below without leaving the page.
Common questions
- Can I try PAT testing: what the law asks for free on this page?
- This guide is free to read, but there is no public quiz specifically for this topic on this page. Browse public practice samples for other subjects, or create an account for the learning path. The full course section requires Plus.
- Is an annual PAT label a universal legal requirement?
- No. HSE does not prescribe a blanket annual testing interval or universal labelling duty. A suitable maintenance system still needs to keep equipment safe.
- Does a recent test label override visible damage?
- No. The condition matters. A label records a past activity rather than guaranteeing that the equipment remains safe.
Explore key terms
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EAWRElectricity at Work Regulations
The Electricity at Work Regulations 1989 set legal duties for electrical systems and work activities in Great Britain. They apply to employers, workers and others with control of electrical work, with the aim of preventing danger. They are law; a training lesson or a test result does not remove those duties.
Read the full EAWR glossary entryInsulation resistance
A measure of how strongly insulation opposes current between parts intended to be electrically separated, usually expressed in megohms. An insulation-resistance instrument applies a DC test voltage. Connected electronics, moisture and contamination can affect the method or reading; an unexpected result needs investigation. A single satisfactory result does not establish every aspect of an installation's safety.
Read the full Insulation resistance glossary entry