I'm installing a subpanel on the outside of my house. It is a "Siemens SN Series 125 Amp 12-Space 12-Circuit Outdoor Main Lug Plug-On Neutral Load Center". The main lugs are rated for 2/0 to 4 AWG wire. I'm feeding the panel with #8 THHN protected with a 50A breaker in the main panel. The THHN is running through 1 1/4" Schedule 40 PVC. As I understand it since the 50A breaker and lugs on the subpanel are rated for 75C, I can use #8 with a 50A breaker.
The question is how to connect the #8 wire to the lugs on the subpanel. Are there connectors I can crimp onto the wire? Should I still use the 110 Lb-Ins torque setting?
Would it make sense to add a 50A breaker to the subpanel and feed it that way (not using the main lugs)?