Single gang electrical boxes will work but if you have two or more conduit sections connecting to one box buy double gang.
Run conduit in attic.
Climb through the attic access using a ladder if necessary and look into the attic space.
Is this to code.
Whatever size conduit you use don t fill it more than 40 percent with wires.
They say that the wiring was put in to add a few lights to bedrooms and it was inspected.
Electrical conduit is metal or plastic pipe through which electrical wires are run.
It is also used in unfinished areas like basements crawlspaces and attics and for surface mounted installations outdoors.
Yes this should be corrected and it would be good to have the wiring and all the circuit connections inspected as well.
The following links will assist you with your electrical question.
Run the metal conduit and plan the bend temporarily attach the lb to the shed and measure from the bottom of the trench to the bottom of the lb fitting.
I have never seen attic wiring installed this way.
It looks like the circuits were added recently too.
Familiarize yourself with the footing situation.
For the threads that ll go into the lb and subtract the bending allowance listed on your bender usually six inches from this measurement for the bend.
The male connectors on the ends of the pvc conduit take up quite a bit of room inside the box leaving little room for devices.
The wiring is so close to the roof and run along the joists.
I took some pictures of the attic wiring at a clients home.
Either rigid or flexible conduit protects the wires and is used in exposed locations such as along the exterior surface of a wall.
With a flashlight examine the attic and locate the path that you will use to run the wire between the two locations.