David,
Take a chill pill.
You are forgetting that NM must be supported according to 334.30 so if it is run on the surface it will be attached to the surface.
You have completely lost me with your reasoning about joists. If I am running NM "at angles with the joist" and it is smaller than "two #6 or 3 #8" then it MUST be installed through bored holes in the joists which refers us to 334.17 OR I may install it on running boards. If I install it through bored holes, running boards are not required. If I install it on running boards, then I don't install it through bored holes.
These are two different wiring methods.
If the work is exposed, it is run on the surface and must meet the requirements for exposed work. If it is installed through bored holes, it is installed through bored holes and needs to meet the requiremnts for that work. You can't take the requirements for one wiring method and apply them to another. I know many people would like to see NM protected wherever it is "visible" but the NEC does not require it.
Take a chill pill.
You are forgetting that NM must be supported according to 334.30 so if it is run on the surface it will be attached to the surface.
You have completely lost me with your reasoning about joists. If I am running NM "at angles with the joist" and it is smaller than "two #6 or 3 #8" then it MUST be installed through bored holes in the joists which refers us to 334.17 OR I may install it on running boards. If I install it through bored holes, running boards are not required. If I install it on running boards, then I don't install it through bored holes.
These are two different wiring methods.
If the work is exposed, it is run on the surface and must meet the requirements for exposed work. If it is installed through bored holes, it is installed through bored holes and needs to meet the requiremnts for that work. You can't take the requirements for one wiring method and apply them to another. I know many people would like to see NM protected wherever it is "visible" but the NEC does not require it.
