Portable Appliance Testing, in-service inspection and testing of electrical equipment under the IET Code of Practice, on a risk-based frequency.
PAT is the in-service inspection and testing of portable and transportable electrical equipment to confirm it is safe to use. It is carried out under the IET Code of Practice on a risk-based frequency rather than a fixed legal interval.
Combined visual inspection and electrical testing identify faults that a user check would miss, and each appliance is recorded with its result and next-due date.