Is the box meant for future expansion? I can't understand why you'd need a pull box for NM.

There is a box there because 10' of EMT was run up the wall into the attic as cable protection to protect the NM that I already had on hand. I din't have to buy any THHN because of this. I only wanted to know if what I asked was permissible. I can't see how it wouldn't be, but you never know.

Nothing says you can't "loop" the wires rather than cutting them and joining them together (either on the device or using other fasteners). However, note that this does NOT change the requirements for free length of conductors in the box NOR box fill calculations.

It sounds like you might be using the EMT only as a chase for protection of exposed cable running up the wall. If you are only using EMT for physical protection, and the NM wiring comes out at each end, I don't think you even need a box connected to the EMT. However, you would want a bushing at each end for protection against damage from the sharp edge of the conduit.

Or maybe I'm misunderstanding your wiring scheme.

Bruce

Thank you Ron and Bruce. Both of your comments were very helpful. Yes, I am only using EMT as a chase for protection of exposed cable running up a wall. My breaker box is located in a ridiculous position in the house. It was necessary to run EMT up the wall and then go horizontally for about 5 feet. I installed a box at the end location on the ceiling because it made the install much easier and broke the install into several parts rather than having to deal all at once with the wall run and 14 inches of blown-in insulation in the attic. I really appreciate your clear answers. It is sometimes hard to get a straight answer to a simple question as some people like to go off on a tangent; often just to irritate you. These are the same people who post negative comments about -- for instance -- YouTube videos -- when they never post any themselves. It is crazy to have to explain every aspect of the job in hopes of getting a simple answer to a simple question, but I don't mind doing it here because I really appreciate the clear answers of you two guys. I am always trying to learn something, and though my methods may vary from what some people would judge as ideal, I am still interested in doing it safely. Thanks again.