What is the maximum test current applied to a 100 mA RCD?

For a 100 mA residual current device (RCD), the maximum test current applied during testing must be equal to the rated residual current of the device itself. This is established to ensure the device is functioning correctly and will operate as intended under fault conditions.

When testing an RCD, applying a test current that matches its rated triggering current allows for accurate verification that the device will trip when it should, offering protection against shock hazards and ensuring safety compliance.

In this case, since the RCD is rated at 100 mA, applying a test current of 100 mA during inspection ensures that the device can properly detect leakage currents and trip as required. The other potential test currents fall short or exceed the necessary level needed for a reliable functional test of a 100 mA RCD, making them unsuitable for this context.