Cabling Factors and Tools Discussion
When performing cable installations there are three factors that need to be considered, fire protection, water intrusion or flood protection, or changes in the structural foundation in your home. The two most important considerations to take into account when either pre-wiring a house or wiring after the house is complete, are the routing of the cable and the quality of the wire used. These two points are often overlooked and the decision to wire the house at all often comes as an afterthought, when most if not all of the interior of the structure has been completed.
Pre-wiring your house, or installing the wire in the stage of construction just ...view middle of the document...
... point of origin. This is almost invariably where the main power service enters the residence.
The most popular method of prewiring your house is called the "home run method" in which each run of wire for each outlet is ran separate back to the point of origin. This type of wiring is preferred for ease of troubleshooting in case of any problem. Also in the future possibility of apartments etc., separation and security of services are more easily maintained. This method of wiring also ensures obtaining the least amount of signal attenuation for each run of cable. So now that you have your wiring route all planned out it's time to drill your holes in the floor and joists.
This assumes, of course, you have an open basement or crawl space to work in. Otherwise you may have to look at routing your wiring up through the walls, across the attic and down by your electrical panel. Drill a hole big enough to accommodate your cable directly below your outlet boxes and a hole either 1/2 inch or 3/4 through all the joists in the planned route. This helps to maintain the structural integrity of the floor joists. Try placing your reel or box of cable at the point of origin and pulling your cables through the holes to the various outlet boxes one wire per outlet. Care should be taken not to pull too hard on the wire or to try and fit too many wires through the same hole. Hauling a couple wires through each 1/2 inch hole is plenty and for more wires you should use the 3/4 inch size hole.
Another technique used by some is to loop the outlets in each room to each other creating one continuous run back to the point of origin. Although this may seem convenient on the surface, in the long run it is much more susceptible to troubleshooting...