Can I use ENT or smurf tubing with thhn to go from the ceiling to the top of the lift post?
I used black flex split tubing in my garage to protect the exposed wiring leading to the sensors at the bottom of the garage door track. I think it looks better than smurf tube, and you can pick up a roll of it for a few bucks at HD or any big box.

Correct!The black split wire loom is not approved for protecting 120V THHN wires.![]()