To get started screw a metal box extender to the outlet box.
Installing gang box on metal roof.
We used a single gang to 4 in.
Then mark and cut a hole for the electrical box in the soffit cover.
We found one of the outlets in our house was shaking a lot more than we thought was normal so we took it apart to find the actual box was damaged.
You ll run conduit from here to the next box.
To get the length of pvc conduit needed photo 5.
Cut the conduit and glue male adapters to each end.
Finish by putting the soffit cover back in place.
Install proper bracing a simple 2x4 between the rafters should be fine and attach the electrical box to it.
Hold the next outlet box in position and measure between the boxes.
Make sure to measure and align the box properly so the box will be flush with or just protruding from the soffit.