PVC junction box connect to main panel to a wire trough through a wall

[k490]

I want to use 2" knock out not being used on the side of my main but can't find a 2" 90 deg elbow plus 2" rigid parts is really expensive. PVC 2" along with a 4x4x4 box is lot cheaper plus I can connect other conduit to it. I only need to go though block wall into my garage about 6" thick. Inside I would go right into a wire trough from what I have read all I have to do is bond the ground wire between the two boxes main and the wire trough. How big of a ground wire do I need to use I will have several wires going through this conduit including PV wire.

 

[TM48]

If PV is what will be in the box you must use metallic boxes, LB's or conduit if it's inside a structure. Outside you can use PVC. Come straight off the load center to a LB then transistion to emt thru the wall. Another LB can be used inside to go laterally if needed or straight into another box.

 

[k490]

I ended up using an aluminum conduit body LB. PVC box looked ugly. This one from Lowes was short enough the ones I saw at Home Depot were really long wasn't enough room between the main and a gate to my side yard. I'm going to go into a wireway box on the inside I want wire to go up into a side entrance of a subpanel and down and over under the inverter. My wire way will look like an upside down Tee with the vertical part going up between the inverter and subpanel.