I'm looking to add some lights on motion detectors (un-switched) and security cameras under the eaves of our house. I know standard romex is often used in attics, but the soffits seem like they might be more exposed to weather. Our soffits are enclosed, like so: (picture from wikipedia.org)
So, do I need to protect any wires which reach into the soffit, such as would power the pictured light? Or should I use wire rated for exterior use? I'm also plotting some Cat 5e runs of a similar nature, should those be protected/exterior as well?