There is no way to answer this question, because the number of pipes in electrical specialty is directly linked to the scale of the system. The more electrical systems you have, the bigger the pipeline (for example, there are three weak current routines besides lighting, access control, intercom, background music, etc.).

As a general reference, for a villa of about 600 square meters, the end of the pipe gauge is about 800~ 1000 meters (only including lighting, sockets and air conditioners, and all the ends are made of FPC20 non-flame retardant plastic pipes), and the consumption of BV line is about 3 times of the number of pipes+about 25% of the number of lighting control lines.