yes masterinbama, i wouldnt need to remove any wall or floor covering. Its all in pipe. I need to remove the old stuff and pull in new wire. They have cloth wire and its getting pretty bad. The costomer just replaced all his outlets and etc. Most of these replies seem to be in a romex or flex situation. Anyone have any experience in places were all home wire is installed in pipe?
If not adding any devices, this sounds like an easy job. Pulling wire from conduit & pulling new wire is much easier than fishing or cutting walls.
Estimate time for removing all devices & light fixtures, time for removing old wire & pulling new. You can often use an existing wire as a fishtape to pull new ones, unless it is too brittle. Set up wire cart at end of line, pull to next box. Pull a long loop & lay out. Pull from next box, etc. You can do that on at least some of the loops & avoid having to make a new head at each box. Estimate time for splices & new devices, rehanging lights. I usually figure these jobs about $20 an hour less than my service rate, as I will be in 1 place longer with less travel.
If the boxes do not have threaded ground holes, use a Greenlee drill/tap kit to easily drill them to 10-32. Easily done & much better than ground clips. Clips sometimes work well but not always.
Rare in my area to see a whole house done with conduit. Very expensive install but easier for such a job as this.