Things you Need To Know About PAT Testing


Portable Appliance Testing or PAT Testing being the shortest abbreviation. What is a PAT test, when is it needed, what does it cover? Well, it’s a periodic test to ensure all electrical appliances are safe to use. If you are in a rented property and the electrical appliances are supplied by the Landlord as part of the tenancy its mandatory for the appliances to be tested.

Any appliance that is not part of a ‘fixed’ installation but needs to be connected to a ‘fixed’ installation is deemed portable. In other words, anything that needs a plug, cable, and socket to operate. What falls into the plug/cable/socket category? Here are a few items for guidance: – a TV, refrigerator (all white goods), PC, kettle, microwave, toasters, electrical tools, stereo equipment, radios, Laptops, electric fans, portable AC units through to portable garden equipment, the list is quite comprehensive and not restricted to the list above. 

Portable appliance test


PAT inspection checks all appliances you connect to the electrical supply (e.g. refrigerators, electric cookers, kettles, toasters etc ) and issue a pat certificate after completion of test.

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A property or business insurance claim could be invalidated without a valid PAT test. With whom does the responsibility rest? With YOU, maybe, if you are an employer, an employee, the self-employed, or a Landlord. We recommend Landlords arrange for a PAT test before the start of a new tenancy. It covers a wide base. An appliance that has been tested will have a green label with the date of the test attached (usually) to the cable. PAT testing is an important part of Health & Safety and shouldn’t be ignored. 

What is PAT Exactly?

The PAT is a process that covers the safety checks of portable electrical equipment in a residential ‘let’ property or business premises to ensure the user’s safety. 

While a large area of the test includes visual testing for defects, there are also additional tests for identifying defects. Some of the tests are carried out are relatively simple; others are conducted with professional electrical PAT testing equipment to measure insulation resistance and earth continuity. The time needed depends on the number of appliances and accessibility.

Do Business Premises need PAT Testing if so, how often?

Short answer, YES. Legally every employer must ensure all electrical appliances/equipment is maintained on a regular bases to prevent any accidents. The ‘Health and Safety at Work act 1974’ is a piece of legislation that pretty much covers occupational Health & Safety in the UK. The frequency of testing mainly depends on usage, quality, and nature of your electrical appliances. For example, portable electrical power tools on construction sites require more frequent inspection and or testing due to moving around the site, compared to an office-based PC.

PAT testing is best left to the professionals

Engaging a trade professional to complete your test is always the best advice. Non-qualified or competent persons to undertake the work puts you and others at risk.

You can rely on Serviceteam London for all your electrical works, however large or small your project may be. Our experienced electrical team have years of experience with all things electrical, including appliances. We are here to help with our services covering all of London 24/7. If you need professional electrical help, please call.

Should The Test Be Conducted Every Year?

Although it’s declared necessary to carry out PAT testing on regular bases, the frequency still isn’t clear. The best guidance is given by the HSE. If unsure, please contact them.

Do i Need To Keep Test Record?

Although there is no legal requirement to keep any test records, it’s always advisable to keep some sort of record. A label (usually green) should be dated and attached to a tested appliance, which is a form of record-keeping but will but won’t last forever especially if the appliance is being used on site. Common record documentation must include:


  • Name/Model of a piece of equipment.
  • Equipment serial number.
  • The date it was commissioned/purchase date. 
  • Location of the appliance.
  • Class of equipment.
  • Previous PAT test date.
  • Next PAT test date.

Well, this record is basically intended to identify test frequency and the location of the appliance. Other documentation needs to include the following: –


  • Date of inspection.
  • Is the tool within its limits, being used in the appropriate environment and the application relevant to the appliance’s rating?
  • Condition of the plug, flexible cable, body of the equipment. 
  • Test results. 
  • Is the appliance safe to use?
  • The professional testers signature. 

Finally, information to include faulty equipment and repair information: –


  • The date at which the equipment was taken out of service.
  • Description of the respective appliance/equipment. 
  • Appliance serial number.
  • Location.
  • The reason why it has been removed from service.
  • Will it be safe to use after repair?

Does new equipment needs testing?

New equipment should be supplied in a safe condition fully tested and approved by the manufacturers, so there shouldn’t be any need for any portable appliance testing. However, do bear in mind the conditions under which the appliance is used. It’s a good practise to visually check it periodically to ensure the appliance is in a safe working condition.

Is PAT Testing Compulsory?

As previously stated, it not a legal requirement but advisory. Every employer or employee has the responsibility to ensure ‘everyone’s’ safety, whether in the office, on-site or elsewhere.

For maximum productivity, people need to know they are working with safe, professionally tested appliances. A visual check will often indicate the condition of an appliance/power tool if at a glance, it looks the worse for wear and ‘risky’, get it professionally checked.