I have a detached garage that I am running coax and cat6 to. Running pvc conduit underground from house to garage. My question is when the conduit comes up out of the ground and into a 1 gang pvc box before continuing upwards to penetrate into a/v enclosure.
Can i use 2nd open inlet on the bottom of the 1 gang box for earth ground to connect to coax ground block inside the 1 gang box. And then the ground continue up and into the garge a/v box to ground the box inside?