One reason you are not allowed to run wires across the bot tom of floor joists is to eliminate the temp tation to use the 12 2 wire for your kitchen gfi as a place to hang laundry.
Run a drop through attic.
Pex had to be ran under the concrete from the utility closet to the kitchen.
We had pex lines run through our attic space to the bathrooms and laundry area.
For single floor homes with a basement the basement may be the best path.
Be sure that you re not interfering with wires or pipes that may run across the top of the room.
Must be run through bored holes or be attached to a running board.
Current carrying wires are meant to support only their own weight.
Brought the cable thru the attic into the hole in the wall and tried to drop the line.
Bring all of the wire up into the attic.
It will be next to impossible to drill downward under the portion of the roof that slopes to the attic floor without a right angle drill.
On pex lines to account for those windy nights where the chill factor and any non desired holes allowing airflow to drop the temperature in the attic further.
Carefully cut a hole in the ceiling or remove a whole or partial panel from the drop ceiling.
When working from an attic space it will be significantly easier to access a wall space on the floor below by working either an interior wall or the exterior wall that is on the gable end of the structure.
While one person holds the flashlight the other person should use a staple gun to run the wire along the rafters from one entry hole to the other.
Watch the entire process step by step.
To a couple of bedrooms by passing the lines through where plumbing goes to the attic for the soil pipe.
If you re building a new house or replacing the roof you can start with lighter colored shingles and go from there.
The actual install of recessed lights here https youtu be 5yc8aqnvqqg the long bit is actually used.
Then the attic doesn t get as hot in the summer or cold in the winter and you cut down on thermal conductivity through the ceiling of the upper floor as a bonus.