I recently completed replacing all outlets and switches in my house. In just about each room in the house one outlet had 3 black and 3 white wires going into it. The receptacles I purchased had room for max 2. You could side wire or backstab. I side wire as is recommended. For these outlets I created pigtails with the 3 existing wires and a 4th wire to go to the receptacle.
Yesterday, after replacing the last switch, I flipped on the power in the room and noticed half the receptacles were not working. These are all on the same circuit that the switch was on. I checked all the receptacles and there were no issues. However, the wirenut on the pigtail I created for one of the receptacles melted. I am stumped how this melted. I replaced the pigtail and all is working fine. But I don’t want this to happen again.
Can someone chime in with anything I did incorrectly?
Details: Hot side melted, 15 amp circuit, 14 gauge wire, 15 amp receptacle, Red wing twist wire nut used, Electrical tape used at bottom of wire nut, South wire 14 solid thhn black wire (used to receptacle)