How do I know if my gfci is self-testing?
All the gfci I have come across have a button labelled “push to test”.
This puts a “fault” across the output and if it fails to react then the unit needs to be replaced.
The proper testing machine will measure the response time and report if it is still within the acceptable range.
There may be some that don’t have test buttons but I have not seen any.
Edit: Just for those who confuse the reset button with the &quot;push to test&quot; button here is an image showing one with both... I assume that that clears up the issue: