I was working on a 7 plex where three of the units have already been remodeled.
I opened the panel in one of the finished units as my project includes a new feeder to each unit.
The insulation on the 12 awg wire coming from the arc fault breaker was melted back about one inch from overheating. This wire was placed under the screw terminal but was never tightened. What else would cause this except that the wire was arcing due to excessive resistance?
I opened the panel in one of the finished units as my project includes a new feeder to each unit.
The insulation on the 12 awg wire coming from the arc fault breaker was melted back about one inch from overheating. This wire was placed under the screw terminal but was never tightened. What else would cause this except that the wire was arcing due to excessive resistance?