Shapiro notes that the UL standard for these connectors varies from 25 pounds for 14-gauge wire to 35 pounds of pulling force for 12-gauge. That’s a lot of force. As for the pull test, Shapiro ...

The tooth won’t damage the individual wires, and because it’s inside the tool, it won’t slice your fingers like a utility blade could. via merchant $ 19.98 at Lowe's ...