Testing 110Volt equipment will depend on your tester. If you have a true dual voltage tester which can be powered up from 110volts it is very strait forward and essentially the only difference to testing 240 Volt appliances is that the tester is plugged into an 110Volt supply. Modern 110 Volt appliances are usually Class II so the tests performed are:

• Visual.
• Insulation at 500Volts DC.
• Touch Current.

After the Visual Test is completed, the method is to plug the appliance into the 110Volt socket on the tester and apply the earth bond lead as a probe for the Touch Current Test onto the casing; If there is metal which is not a moving part, clip or hold the earth bond lead onto it. REMEMBER the Touch Current Test is a power on test. The appliance has to be secure during testing to the extent that it can’t injure anyone while operating.

You can now proceed with the test but do not touch the appliance during the Insulation Test for you own safety.

If your tester is a 240Volt tester you can test 110Volt equipment using a 240Volt/110 Volt adaptor. This will not include a power on test (Touch Current). The tests you apply are:

• Visual.
• Insulation at 500Volts DC.
• After the Visual Test is completed, the method is to plug the appliance into the 110Volt adaptor on the tester; plug the adaptor into the 240Volt socket on the tester and apply the earth bond lead as a probe for the Insulation Test onto the casing. If there is metal, clip the earth bond lead onto it.

You can now perform the test but do not touch the casing during the Insulation Test for your own safety.

Written By Austin