Frequency of PAT testing

Determining the frequency of In-Service Inspection and Testing (ISIT), commonly referred to as Portable Appliance Testing (PAT testing), is crucial for ensuring the ongoing safety of electrical equipment in your workplace.  While no strict legal requirements dictate ISIT / PAT testing frequency, the Responsible Person or Duty Holder, often the employer, landlord, or individual overseeing the premises, must consider factors like equipment type, usage environment, and industry best practices to maintain a safe environment.

Annual Testing: Many organizations choose to conduct ISIT/PAT testing annually for most electrical appliances. This ensures that equipment subjected to frequent usage or operating in higher-risk environments, such as power tools and kitchen appliances, remains safe and compliant.

Bi-Annual Testing: Some equipment may require electrical ISIT/ PAT testing every six months, particularly if they are used in harsh conditions or are prone to frequent wear and tear. This includes electrical equipment used outdoors, in damp areas, or in industrial settings.

Three-Yearly Testing: For newer equipment with lower risk factors, such as office equipment like computers and printers, ISIT / PAT testing every three years may be sufficient. However, regular visual inspections are still recommended to catch any signs of damage or deterioration between formal testing intervals.

Risk-Based Approach:  It's imperative for the Duty Holder to conduct a comprehensive risk assessment to determine the optimal ISIT / PAT testing frequency for your equipment and work environment.  Factors such as equipment type, usage patterns, and environmental conditions should be considered when establishing ISIT / PAT testing intervals. 

By following these guidelines and adopting a risk-based approach to ISIT / PAT testing, you can ensure the ongoing safety and compliance of electrical equipment in your workplace.  Regular ISIT / PAT testing and inspections help identify potential hazards and mitigate risks, ultimately creating a safer environment for everyone.