How to Test and Tag a Laptop

Testing and tagging a laptop involves looking at the individual components separately. The detachable IEC lead and laptop power supply/charger are inspected and tested as separate items, with each receiving its own test tag where applicable.

The laptop itself doesn't need to be electrically tested, as it is considered an extra low voltage item. It should still be visually inspected for signs of damage.

Testing the IEC lead

There is a wide variety of IEC leads that connect to the laptop charger. Depending on the connection, an adaptor may be required to connect the lead to your portable appliance tester.

The main types are:

• Clover leaf - requires adaptor
• Figure 8 - requires adaptor
• Standard IEC connections - no adaptor required
• Apple chargers - no adaptor available

The required testing depends on the type of lead. For the majority of IEC leads, it includes Earth Continuity, Insulation Resistance and Polarity testing. The exception is a Figure 8 lead, which requires Insulation Resistance testing only.

Testing the Laptop Charger

Most laptop power supplies you’ll come across are Class II (double insulated), but you should still confirm the equipment class before testing.

Check the manufacturer's label or rating plate. In particular, look for the square-within-a-square symbol which confirms it's a Class II and does not rely on protective earthing.

Once you've identified the equipment class, select the appropriate tests on your portable appliance tester.

If you found this guide useful, you might also find it beneficial to see our video on how to test and tag a computer.