Portable appliance testing (commonly known as PAT or PAT Inspection or PAT Testing) is a process by which electrical appliances are routinely checked for safety.
Portable Appliance Testing (PAT testing process) begins by simply observating a portable appliance, followed by a formal visual inspection, concluding with a formal inspection by a person deemed competent to perform the testing.
PAT testers (portable appliance testers) reduce the risk of electrical shock by detecting potential safety problems with electrical appliances before they occur.
PAT Testing is regulated by the Safety, Health and Welfare at Work Act 2005 in Ireland. This legislation is implemented under Statutory Instrument S.I. No.299 of 2007, which came into force in November 2007.