Cut the cable leaving plenty of slack and feed the cut end into the wall cavity and out through the wall hole as you did with the first box.
Run extension cord through attic.
Extension cord flexible cords and cables shall not be used for the following.
As a substitute for the fixed wiring of a structure.
Roll out the cable through the basement or attic space to the next box location.
Familiarize yourself with the footing situation.
Climb through the attic access using a ladder if necessary and look into the attic space.
There are many problems with this the main being that it s against code relevant section.
Get comfortable in your favorite chair and start wrapping that electrical tape around the extension cord.
If the wall above runs parallel to the attic or basement joist this cable will be attached across the side of a joist.
Extension cords are typically stranded wire vs the solid wire found in typical home wiring.
Run electrical wires underground to reach sheds lights patios and other locations following safe wiring practices.
No you can t run flexible cord through the ceiling walls.
I have tv cords that run up through the wall cap and plug into a surge protector resting on the floor of the attic which is then plugged into an outlet light fixture in the attic.
With a flashlight examine the attic and locate the path that you will use to run the wire between the two locations.
Nec 400 8 uses not permitted ref.