Q If an AFCI indicator plugged into a receptacle protected by an AFCI doesn’t trip the AFCI, does that mean the AFCI protecting the circuit is defective
and should be replaced?
A No, an AFCI that does not trip when used with an AFCI indicator does not necessarily mean that the AFCI is defective and needs to be replaced. AFCI indicators on the market today are not AFCI testers, they are listed by UL as AFCI indicators
under one of two product categories including Outlet Circuit Testers (QCYU) located on page 91 of the 2004 White Book or Measuring,
Testing and Signal Generation Equipment (PICQ), which can be located on UL’s Online Certification
Read the signsDirectory at
www.ul.com and enter PICQ at the category code search.
ese AFCI indicators provide an indication if a selected receptacle is protected by an AFCI. ese indicators
are generally used to reduce the number of trips to the panelboard location to push the test button on the AFCI circuit breaker. AFCI indicators
produce a waveform that mimics
an arc and because each AFCI manufacturer has a unique way of detecting an arc, every AFCI indicator
may not trip every AFCI. When in doubt, push the test button on the AFCI circuit breaker to be sure.
Please note the only accepted method for testing an AFCI is to push the “test” button provided as an integral part of the AFCI itself.
AFCI indicators are provided with instructions that state the proper way to “test” an AFCI breaker.
AFCI indicators are required to be marked on the product or provided
in the user instructions as follows:
“CAUTION: AFCIs recognize characteristics unique to arcing, and AFCI indicators produce characteristics
that mimic some forms of arcing. Because of this the indicator may give a false indication that the AFCI is not functioning properly. If this occurs, recheck
the operation of the AFCI using the test and reset buttons. e AFCI button test function will demonstrate proper operation.”