Portable appliance testing (PAT) is the term used to describe the examination of electrical appliances and equipment to ensure they are safe to use. The testing can be both a visual examination and a user test, depending on the type of equipment, and the environment it is used in. The term portable appliance fits into the following seven categories:
Fixed appliances
Stationary appliances
IT appliances
Moveable appliances
Portable appliances
Cables and charges
Hand-held appliances
Is PAT testing compulsory?
Testing is not the law, however, employers are legally required to maintain their electrical equipment to prevent danger. Employers should take a risk-based approach, considering the type of equipment and what it is being used for, and build this into their health and safety procedures. PAT testing is one of the most effective ways to do this, particularly for high-risk or large, complex environments, and such, has become a standard practice.
How often should PAT testing be completed?
The frequency of PAT testing depends on the electrical class and category of the item.
Class 1 needs a full PAT test – Single insulated wiring, which requires an earth connection.
Class 2 needs a PAT insulation test – Double insulated wiring. The earth clamp is still connected during the insulation test, even though there is no earth on the appliance.
Class 3 don’t need to be PAT tested – These are appliances that are supplied at a low voltage (usually called Separated Extra Low Voltage) which must be less than 50 V. These appliances are supplied with a transformer supply that is also marked.
Does PAT testing require a qualified electrician?
This depends on the workplace, in low-risk environments, a trained member of staff can take on the role of visual inspection and testing. However, in high-risk environments, when undertaking combined inspection and testing, an electrician will have the right equipment to do the tests, and the knowledge and experience to ensure the tests are completed properly.
We hope this short guide was useful. For more information on your electrical safety requirements within the workplace, take a look at the HSE website, which has some practical guidance. If you’re looking for a qualified and experienced electrician to ensure electrical safety in your workplace, contact us today to see how we can help.
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