Essential PAT Procedures

1. Preliminary Visual Inspection to check for visible defects
- Damaged or incorrectly wired plugs
- Non-British Standard or incorrect value of fuse
- Damaged cables or switches/controls
- Sub-standard connection of cable to appliance
- Damage to appliance case

2. Earth bond Test (Class I equipment only)
- To test the integrity of the protective earthing circuit. (The appliance is connected to a portable appliance test machine to check the continuity resistance of the protective circuit is within IEE tolerances)

3. Insulation Resistance Test
- To test the integrity of the insulation of the appliance between the live and protective earth parts of the appliance
- The appliance is subjected to 500v D.C. between the phase and neutral conductors connected

4. Load/Operation test
- To verify that the appliance is working safely and does not have excessive leakage.

- N.B. Other tests may be carried out as necessary, as specified by the IEE (Institute of Electrical Engineers) Code of Practice