I am running a service to my new shop from my house service. Its 150' to new new box, I'm running (3) #6 wires, (1) 10 gauge and (4) 12 gauge wires in the run. What size conduit should I run? Thanks

Why run all that in the conduit. Would be cheaper to run 1 larger capacity feed and use a subpanel.

Hi, the (4) 12 gauges are for a 3 way light switch, so I can turn off exterior lights from the house. I am setting a subpanel in the shop with 50 amp. Capacity, Thanks.

I would use 1-1/4" PVC Sch 40 Conduit, buried min 18 inches.