Customer reporting pool pump not working. Only getting 1.6V at the receptacle, all others showing 120V. One wire in it, so obviously last one on the circuit. Went to the one before it, found this. All of them backstabbed. Reterminated them all before I left
On receptacles it generally is a bad idea. Things being plugged & unplugged all the time makes for little micro movements of the device that will wear at the thin connection and over time cause a problem. It’s not as big of a problem for switches, not as much movement and beating around