Portable appliance testing

In electrical safety testing, portable appliance testing (PAT, PAT inspection or PAT testing) is a process in the United Kingdom, Ireland, New Zealand and Australia by which electrical appliances are routinely checked for safety. The formal term for the process is "in-service inspection & testing of electrical equipment". Testing involves a visual inspection of the equipment and that any flexible power cables are in good condition, and also where required, verification of earthing (grounding) continuity, and a test of the soundness of insulation between the current carrying parts, and any exposed metal that may be touched. The formal limits for pass/fail of these electrical tests vary somewhat depending on the category of equipment being tested.

"PAT Test" redirects here. For other uses, see PAT Test (disambiguation).

Other countries have similar procedures, for example, testing of equipment according to DGUV Vorschrift 3 in Germany.

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