What does a PAT Test consist of?
There are three categories of in-service inspection and testing:
1. User Check
Performed by the user before plugging in and switching on the equipment and involves a visual inspection that includes the plug, the flex, the appliance and the suitability 
of the appliance for the environment and the job. Faults or suspected faults should be reported and logged, and faulty equipment should be removed from service. Normally, no record is required if no fault is found.
2. Formal visual inspection
Performed by a competent person, often the test operative. The formal visual inspection consists of performing the user checks and, in addition, checks on the suitability of the equipment for the environment and checks on the switching of the equipment. The formal visual inspection includes removing the plug top and inspecting the wiring, connections, fuse and cord grip for rewireable plugs. Equipment failing the formal visual inspection should be removed from service, labelled and repaired. The formal visual inspection should be recorded.
In general, approximately 80% of all problems are found during the preliminary visual inspection process. A detailed examination by a competent and conscientious person will therefore make the greatest contribution to eliminating hazards.
3. Combined inspection and PAT test
Performed by the test operative and consist of
- an inspection,
- testing as necessary to ensure the equipment is in a safe condition (the testing may include earth continuity testing at a high or low test current and insulation testing or a protective conductor/touch current measurement), and
- functional checks.
The combined inspection and test should be recorded.
For information on the type of equipment used to perform a PAT test, visit the PAT tester section.