I think "IF" is the second biggest word in the English language.
The 'authorities' assert point-blank that there has never been a documented instance of a properly functioning, listed appliance falsly tripping an AFCI. Look carefully at that statement, and there are plenty of "ifs" lurking within.
"Listed" rules out the very large number of things we use that are not listed, and are not required to be listed. That's the first hurdle- especially if your 'appliance' is some trendy European or commercial gizmo.
That in turn implys following the manufacturers' instructions. This can get interesting, as many appliances have instructions that some will assert are in conflict with the NEC. For example, refrigerators that say NOT to use on a GFCI circuit.
"Properly functioning" refers to TODAY'S standard, which was likely revised quite recently to accomodate the GFCI and AFCI problems. That expensive, top-quality Swedish vacuum of yours - the one you get as a wedding gift 30 years ago - wasn't made to these standards ... so POP goes the breaker.
Naturally, the 'experts' will then assert that it's your fault you didn't replace all your stuff with new when they changed their standards.
