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| PAT Testing Procedure of Electrial Portable Appliances. | ||
| Inspection and Applicance Testing is carried out in several stages:
1) Preliminary Visual Inspection Visually checking the appliance for safety of the plug, fuse, wiring, cable and protective case of the appliance. Our engineer will ask themselves questions such as:
The flex - is it in good condition? Is it free from cuts, fraying and damage? Is it in a location where it could be damaged, is it too long, too short or in any other way unsatisfactory? Does it have inadequate joints? The plug - is the flexible cable secure in its anchorage? Is it free from any sign of over heating? Is it free from cracks or damage? The flex outlet - is there any sign of overheating? Is it free from cracks and other damage? The appliance - does it work? Does it switch on and off properly? Is it free from cracks, contamination damage to the case, or damage which could result in access to live parts? Can it be used safely? The users - are they satisfied that the equipment works properly? The environment - is the equipment suitable for its environment? Suitability for the job - is the equipment suitable for the work it is required to carry out? 2) Earth Bond Testing
The safety of certain appliances depends upon a connection with the earth for its safety A test is carried out using electrical test equipment to ensure a safe earth is present in the appliance 3) Insulation Testing A test is carried out using electrical test equipment to ensure the insulation resistance in the appliance is at a safe level 4) Flash Testing A test is carried out to measure the insulation of an appliance if a very high test voltage is applied to it 5) Load Test A test is carried out applying a voltage through a current limiting resistor to the mains supply plug and checks that the current flow will not be excessive when full voltage is applied to the appliance 6) Earth Leakage Measurement A test is carried out to monitor the current flow through the earth lead of the appliance. This test is of particular value when an appliance incorporates a number of sequences which may change the electrical characteristics of the appliance during its operation. 7) Functional Check A test is carried out to ensure that the appliance is working correctly |
