No you do not need conduit also there is a wire staple any hardware should have them your better off running it as is when you put wire in conduit it creates heat not good.
Do i need conduit for attic.
It will be easier to repair wires if there is a short in the line.
I cannot find this specifically in code so here is my question.
It also is easily damaged unlike imc or rigid conduit.
A favorite target of electrical inspectors is the improper use of non metallic cable nm in exposed locations such as basement foundation walls or along the face of studs and joists in unfinished framed spaces.
The national electrical code which is the basis for all local building codes has specific regulations for installing electrical wires so that they are protected from damage.
Imc conduit is a thicker conduit that is galvanized making it a great choice for outdoor installations.
The attic wiring should be protected and secured to ceiling joists or other wood structural supports.
Emt conduit is lightweight easy to bend and is used within the walls.
Using conduits will ensure that your wires are kept together.
Methods of proper attic electrical wiring raul no this is not a standard practice and is most likely the result of improper installation of electrical attic wiring.
Conduit also protects your wires from exposed surfaces such as rough bricks in a basement.
When romex is run across rafters in an open unfinished attic it is my position that a raceway of some kind 1x3 s or even 2x4 s should first be attached across the affected rafters perhaps 3 to 4 above the joists then the wiring be stapled to the raceway.
Water heaters can lights and attic vents are great examples of typical flexible conduit installation.