This ‘how to manual’ contains brief guideline on planning your whole house wiring system. Start by creating checklist which will guide you to buy enough wire to complete the job without too much excess; buy the right boxes, brackets and wall plates; describe the work in detail; figure the total cost of the system; and check that each step of planning is done as the work progress. Herein you will find also brief explanation on how to estimate the wire length of your house wiring system is needed.
The key to estimating wire runs is to work your way from point to point carefully, without overlooking anything. If you are working from plans, use a scale ruler. Better yet, walk through the construction site or your existing house, pacing off each run and thinking through where the wire will have to turn a corner or go up or down a wall. Convert your paces to feet and write it down on your room plan.
Find the detail House Wiring Plan – How to Manual here (166 KB pdf file. Source: pix.crutchfield.com)