AS / NZ 3760: 2003 is a document written by Standards Australia that specifies procedures and criteria for the inspection and safety testing in service of electrical equipment that is designed to be connected by flexible cable. It also applies to cord extension sets, portable output devices, residual current portable devices. The appendices include detailed test methods.
1. Visual inspection
The most important test is a visual inspection of the device, especially its cables. Cables must be firmly anchored in sockets, connections must be made solidly without frayed ends. Copper terminals must be clean and free of pitting.
There should be no signs of heat or melting from the plugs. Conductors should be visually inspected along their entire length to ensure there are no cuts, cracks, or breaks. This test alone represents 80% of the testing process.
2. Polarity
A polarity test is performed on the cables, power boards, etc., and it is a functional check that the Active, Neutral and especially Earth are not wired incorrectly.
3. Insulation resistance
This test is important for appliances that come into contact with water, such as pumps, kitchen and cleaning appliances, etc., but it must be performed on all items. This will reveal if there are fine cracks or cuts in the wire that will result in low insulation resistance.
4. Earth resistance
This test will pass a higher current (up to 25 amps) through the wire to ensure that the ground wire has a strong connection.
5. Earth leakage / contact leakage
A leak test must be performed on a circuit that must be energized to be turned on. that is, circuits with electronic switches. The apparatus is tested under load and the amount of current leaking from the circuit is tested.
6. The label itself
A label will be attached to the plug end of the appliance cord. It will clearly indicate the date of the test, the date on which the test must be taken again and who performed it.
7. Database
A complete test record will be based on data, including; the identification of the asset; Test results; sites and locations; new test date; description, brand and serial number of the asset; and any additional notes our testing and labeling specialists wish to include.