Measure the distance between the two sites you want to run wire between and make sure you will have enough wire.
Run wires not accessible from outside to attic.
Rigid conduit with an outside diameter of 3 4 in and a fish tape long enough to reach through the buried pipe.
Running wires inside rigid conduit.
The attic wiring should be protected and secured to ceiling joists or other wood structural supports.
You will need to cut a square of drywall at the very top of your wall in order to give you access to drill through the top plate of your wall.
Make the opening about 12 x 12 to give you room to get the drill in.
Step 2 find your attic access.
You can then splice on a new piece of wire make sure it is the same wire gauge and run the new piece from the junction box back to the fixture box.
If sheltered from direct.
To run the wires inside rigid conduit you ll need a hacksaw a pipe bender capable of bending 1 2 in.
The second method is to run cable.
If there is access above the light in an attic or kneewall space you can remove the wire from the existing fixture box and install it in a junction box.
If you drill holes in the joists and run wire through those holes you ll be disturbing the insulation.
One method is to run individual wires in a conduit system such as intermediate conduit rigid conduit or schedule 40 or 80 vinyl conduit.
Don t forget to include the vertical distance up to the attic and back down again.
You will want to run the cable parallel to the direction of the joists.
Raul no this is not a standard practice and is most likely the result of improper installation of electrical attic wiring.
I just got back from my attic and realized i can t access the soffit from there.
Cut the opening in the ceiling for your new electrical box.