I’ve come across a few circuits in Berkeley that have been failing on the return side of 120 volt receptacles? Arcing enough to melt the face of device, in a recent kitchen remodel 2006? All inspected but failing where 1500 watt appliance have been used not old appliances? I believe all were 20amp leviton devices, all new Romex circuits? Possibly just poor workmanship? No loose connections that I’ve found?
