Re: wiring in attic
Like Mike says, NM can be run along the top of the joists (bottom chord of the trusses), but if it's in an area that's accessible to people (i.e., it could be stepped on) it must be protected. A 1x4 running parallel and adjacent to the wires is generally considered adequate protection.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.