Determining the right PAT testing frequency for different types of equipment in different environments is one of the most important — and most misunderstood — aspects of electrical safety management. This guide compiles the key guidance from the IET Code of Practice into a single reference.
Construction and Industrial Sites
- Power tools (110V): Every 3 months
- Power tools (240V): Every 3 months
- Extension leads and portable distribution: Every 3 months
- Site office equipment: Every 12 months
- Battery chargers: Every 6 months
- Fork lift truck and machinery chargers: Every 6 months
Commercial Kitchens and Food Service
- Catering equipment (kettles, toasters, microwaves): Every 6–12 months
- Food processors and mixers: Every 12 months
- Commercial refrigeration: Every 12 months
- Glass washers and dishwashers: Every 12 months
Offices, Schools, and Low-Risk Environments
- Desktop computers and IT equipment: Every 4 years (visual check annually)
- Photocopiers and printers: Every 4 years
- Extension leads: Every 4 years (visual check annually)
- Portable heaters and fans: Every 1–2 years
- Vacuum cleaners: Every 12 months
- Power tools (e.g. in DT departments): Every 12 months
Rental Properties
- Standard residential lets: Every 12 months
- HMOs: Every 6–12 months
- Student accommodation: Every 12 months or at change of occupant
- Holiday lets: Every 12 months
Using This Guide in Practice
These frequencies are guidance rather than absolute legal requirements. The appropriate frequency for your specific equipment and environment should be determined by a risk assessment. If in doubt, more frequent testing is always the safer choice. Contact MES PAT Testing Ltd to discuss the most appropriate testing programme for your business.
