There is a regular outlet in our master bathroom next to the sink. The plug type is not a GFCI outlet. However, in our kitchen, there is only one GFCI plug next to the sink, and the other outlets must be wired through that one GFCI because when the one is tested, the others go out as well.
Can I used a GFCI tester on the regular outlets in the kitchen which would cause the main GFCI outlet trip? will this cause any damage?
Can I also use it in the master bathroom to figure out if that one is also wired from another GFCI outlet? (The main bathroom is right beside the master, and there is a GFCI outlet in that bathroom.)
If the outlet in the master bath is not coming from another GFCI plug, I will change it.