PAT Testing Three-Phase Equipment
Three-phase portable equipment is common in industrial workshops, factories, commercial kitchens, and construction sites across Greater Manchester and Northwest England. Testing three-phase equipment requires additional knowledge and equipment beyond standard single-phase PAT testing.
What is Three-Phase Equipment?
Three-phase electrical equipment uses three live conductors instead of one, providing higher power output. Common examples include:
- Industrial motors and compressors
- Large workshop machines (lathes, milling machines, large drills)
- Commercial kitchen equipment (large ovens, dishwashers)
- Heavy-duty power tools
- Welding equipment
- Large industrial fans and blowers
How Three-Phase PAT Testing Differs
Three-phase PAT testing requires:
- Appropriate test equipment: Standard single-phase PAT testers cannot test three-phase equipment. A three-phase adapter or a dedicated three-phase tester is needed.
- Additional knowledge: The tester must understand three-phase systems, star and delta configurations, and how to interpret test results for three-phase equipment.
- Earth continuity testing: Must be performed between the earth connection and all accessible metal parts, as with single-phase, but with consideration of the three-phase supply configuration.
- Insulation resistance testing: Must be performed between all live conductors and earth, and in some cases between live conductors.
Common Issues We Find
Three-phase equipment tends to be more expensive and longer-lived than single-phase items, which means we often find:
- Very old equipment that has never been tested
- Worn cables from years of industrial use
- Modifications and repairs that may not meet current standards
- Incorrect fusing or protection
Our Three-Phase Testing Service
Green Tag PAT carries three-phase testing equipment and has the experience to test industrial equipment properly. We test three-phase equipment across Greater Manchester and Northwest England — from small workshops to large manufacturing facilities. Contact us for a quote.
Need a PAT Test in Greater Manchester?
Based in Salford, covering all of Greater Manchester. From £59, same-day certificates.