Oops. I totally missed on that one.
I found these related FAQís on Siemens website. They donít really offer any definitive answers though.
Iíve had that happen occasionally, but very infrequently, and Iím wondering if it might possibly have something to do with the length of the circuit, among other things.
Should an AFCI breaker trip when using a hand-held tester?
To clarify, these devices are only indicators and not "testers." Please see the attached letter from UL that addresses this issue. Click Here
The hand-held indicators currently on the market, do not generate a genuine arc and, therefore, the only true way to verify the operation of any AFCI (Branch Feeder and Combination Type), regardless of brand, is to use the Push-to-Test button.
Can you use a hand-held GFCI tester to test an AFCI circuit breaker?
No. While some GFCI testers may cause an AFCI to trip, these devices are not testing the arc detection capability of the breaker. AFCIs utilize a differential sensor to detect leakage of current in a circuit. When the GFCI tester creates a leakage of current greater than the threshold level of the AFCI's differential sensor, the device will open. However, this fault detection is not intended to provide personnel protection, as the AFCI trip thresholds for differential current vary by manufacturer but are typically 30mA to 60mA Ė far above the 5mA level required for personnel protection. In addition, AFCIs do not specifically include grounded neutral protection.
Will an AFCI trip when testing a GFCI receptacle installed on the same circuit?
If a GFCI receptacle is installed on the load side of an AFCI it is possible for both the AFCI and the GFCI to trip on a ground fault if the leakage current exceeds the threshold for both devices. It is also possible for the AFCI to trip and the GFCI to not trip since the two devices could race each other. The functionality of each device should be verified by operation of the Push-to-Test button.