I am attempting to wire the house from the panel box, located in the garage, to the rest of the house. To do this acceptable to code, I would like to run the wires through a pipe (pvc maybe), attaching the pipe to the beam and then into the house rather than drilling holes through each beam etc. Can I do this and still be ok with code and is it safe to do? Also, I already wired the upstairs bedrooms with 14/2 wire (outlets and lights) and bathrooms will be with 12/2 and GFI's. What do I use for the hardwiring of smoke detectors? There are so many changes since I saw my Dad doing this and well, I never built a home before so I thank you in advance for your advice and help.