I have a house with a circuit for a backyard SPA that is no longer present. I want to remove all wiring coming down from the attic, but want to leave the fat 220V line in place (in case I need in the future) and terminate it in the attic.
Which of the following would be the proper way to terminate the line inside the attic according to electrical code?
Just tape the wire ends, hang wires around to a stud, etc..
Add wire nuts/caps to wire ends instead of taping.
Add wire into a closed junction box, mount box in stud.
Add disconnect box (pull type, for future use) and mount in stud.
Any code-required location for box? Does it matter, should it be at any height?