I have a new 4 wire receptacle for a range connection, the wires are 6 guage stranded, which don't hold in the new receptacle. I used utilitech copper crimp ferrule's on the wire ends and tightened the receptacle screws down on them which did the real crimping – I don't have a true ferrule crimp tool.
Is this use copper ferrule on stranded copper for a 240V range receptacle acceptable by code and practice?
Best Answer
No, that's a terrible idea!
The set screws in the receptacle are not designed to compress a crimp ferrule.
All equipment in the North American market is supposed to be UL-listed (or other NRTL such as CSA or ETL... note that CE is not one!) You must follow the installation instructions becuase those are the only conditions the equipment is tested or certified for.
Generally, we don't use ferrules in North American wiring.
Since ALL #8 and #6 insulated wire is stranded, the stranded wire is not the problem.
If your receptacle is not UL listed, that's the problem.
If it is UL listed, either the receptacle is unduly difficult to work with, or your splicing techniques aren't up to snuff. Keep learning!