“Why Do You Test and Tag The Same Thing Twice? “

Do Detachable Leads Require Testing?

Yes, detachable leads (cord sets) must be tested according to the AS/NZS 3760:2022 standard. If the lead handles more than 50V, it must be tested to meet the relevant safety requirements under the Australian standard.

However, if the appliance converts voltage to extra low voltage (such as 50V or less), like a USB or lighting cable, only the part of the device receiving the voltage above 50V (usually 240V) requires testing. For example, in a standard Apple iPhone charger, the part that plugs into the wall would need to be tested, while the lighting cable that connects to your phone would not.

This is mandated under ASNZS 3760/2022, specifically under Section 2- Inspections & Tests - Point 2.1 under “General” “Note” -

“NOTE - For equipment that is supplied by a cord set, both the cord set and equipment need to be tested and tagged separately.”

In many workplaces, laptop chargers are a common item that require attention during electrical testing and tagging. When the charger includes a removable IEC lead connected to the transformer block (commonly referred to as the power brick), both the IEC lead and the transformer block must be tested and tagged separately.

Although the transformer converts 240V AC to a lower DC voltage (such as 12V), it still receives 240V input, making it a legally required item for testing under AS/NZS 3760:2022. Both components are considered separate electrical appliances for compliance purposes.

It’s also important to note that two different types of tests are required in this situation—something that is often misunderstood. The IEC lead undergoes Earth Continuity, Insulation Resistance, and Polarity testing, which cannot be completed on the Class II transformer block alone. This distinction is essential, as the transformer (being a Class II appliance) typically lacks an earth connection and requires a Class II insulation resistance test instead.

Failing to test both components properly could result in non-compliance with electrical safety standards. At Perth Test and Tag Solutions, we ensure all components are tested individually and correctly to maintain full workplace safety and compliance.