TIP: for connecting stranded wire with solid wire. Sizes #10, #12, #14 wire gauge.
If you have more than one stranded wire to be connected, strip the insulation of all wires and wrap the wire strands together. If connecting these with one solid wire, place all the wires parallel making sure that the end of the stranded wires do not fall below the end of the solid wire, i.e., the ends of all the wires should be even. Install wire connector. If connecting the stranded wires with more than one solid wire, first twist the solid wires together, then cut the tip of the solid wires diagonally, then place all the wires parallel. The ends of all the wires should be even. Install wire connector. Some electricians find it better not to twist the solid wires when using “wire nut” or “wing nut” type connectors; my experience has proven different. After installing the connector, with one hand hold the wires, with the other hand try to pull the connector straight off. It should not come off with mild pulling force. Try pulling the stranded wires separately. They too should not come off
with mild pulling force.