Portable appliance testing (PAT) is the term used to describe the examination of electrical appliances and equipment to ensure they are safe to use.
Most electrical safety defects can be found by visual examination but some types of defect can only be found by testing. However, it is essential to understand that visual examination is an essential part of the process because some types of electrical safety defect can’t be detected by testing alone.
A relatively brief user check (based upon simple training and perhaps assisted by the use of a brief checklist) can be a very useful part of any electrical maintenance regime. However, more formal visual inspection and testing by a competent person may also be required at appropriate intervals, depending upon the type of equipment and the environment in which it is used.
PAT Testing with EMR Electrical
How Frequently Must I Have My Equipment Tested?
The frequency of inspection and testing depends upon the type of equipment and the environment it is used in. For example, a power tool used on a construction site should be examined more frequently than a lamp in a hotel bedroom. For guidance on suggested frequencies of inspection and testing visits the HSE: Maintaining portable and transportable electrical equipment.
What Does a PAT Test involve?
A portable appliance test (PAT) involves:
- Visual inspection
- Earth bond test
- Flash testing
- Load testing
- Insulation resistance test
- Earth leakage test
- Functional test
