When there is no flooring to walk on other than the edges of the trusses consider bringing a piece of plank or two you can lay across the trusses as a walkway.
Run recepticle from attic to outside wall.
Rigid conduit with an outside diameter of 3 4 in and a fish tape long enough to reach through the buried pipe.
This allows for a maximum of 12 feet between receptacles on the same wall.
On the second floor run wires down the wall from the attic.
When necessary use existing ducts or pipe runs to get wires from the attic into the basement.
In the example described here we running a simple loop of wire from one new wall box location to another such as you might do when extending a circuit.
Familiarize yourself with the footing situation.
Secure the cable to the wall using cable staples or cable straps.
To run the wires inside rigid conduit you ll need a hacksaw a pipe bender capable of bending 1 2 in.
On the first floor run wires up the wall from the basement.
Running wires inside rigid conduit.
Place a staple or strap within 12 inches of each box and at intervals not exceeding 4 1 2 feet between those two staples or.
See figures 1 2 3 wall space includes the following.
If you have access to your basement crawl space and attic you should be able to run wires without having to cut patch any drywall.