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Lovies test and tag

 

Kimberley during the testing process 1

Kimberley during the testing process 2

Kimberley during the testing  process 3

 

 

 

 

 

 

 

 

 

 

 

 

 


 

The testing process

There are 6 steps to the tagging process

1. Visual inspection
2. Polarity
3. Insulation resistance
4. Earth resistance
5. Current leakage
6. The tag itself

This standard outlines the testing procedures for Class I (earthed) appliances and Class 2 (double insulated) appliances. 

Tests that should be performed are as follows:

 

1. Visual inspection

The most important test is a Visual Inspection of the device, especially its leads. Cords should be firmly anchored in plugs, connections made solidly with no frayed ends. Copper terminals should be clean and not pitted.

There should be no sign of heat or melting of plugs. Leads should be visually inspected for their entire length to ensure that there are no cuts, cracks or breaks. This test alone represents 80% of the testing process. - return to top

 

2. Polarity

A Polarity test is done on leads, power boards, etc, and is functional check that Active, Neutral and especially Earth are not incorrectly wired. - return to top

 

3. Insulation resistance

This test is important on appliances which come in contact with water such as pumps, cleaning and cooking appliances etc, but must be performed on all items. This will reveal if there are any hairline cracks or cuts in the lead which will result in a low insulation resistance. The resistance is measured at 500V or 250V with appliances with MOVs (surge protectors) between active and neutral to earth.

No less than 1M ohm resistance should be measured form live parts to exposed metal. - return to top

 

4. Earth resistance

This test will ensure that a class I appliance has a low resistance  earth connected to any external metal

No greater than 1 ohm resistance should be measured from the earthing conductor to external metal. - return to top

 

5. Current leakage

This test will test if any current is leaking out of the circuit. Kirchhoff's current laws states that the current input is equal to the current on the out put. in appliance terms the current flowing through the active pin should equal to current flowing through the neutral pin. if it does not that the current is leaking some where else. This is normal due to a fault in the appliance.

This test must be performed on all appliances that must be energized to be switched on. That means that a leakage test must be performed if there is any electronic switching in the appliance (there is no way to know if there is electronic
switching in a device The Lovie's tagso it is recommended
that a leaking test is performed when possible.) - return to top

 

6. The tag itself

A tag will be applied to the plug end of
the appliance lead. It will clearly state
the date of the test and the date it is due
to be retested, and who tested it or
company that tested, at a minimum.
But is recommend that all these things
are recorded. - return to top

 


 


Lovies test and tag