Seeing your problems, I feel that you have no foundation. You are talking about the distribution of power. You need to find some books on power supply and distribution, which have little to do with mechanical and electrical specialty. I suggest you look at some things, such as: electrical application drawing, power internal and external line construction, electrical foundation; Factory power supply. Let's take a look at this, too! If you want to learn about power distribution in decoration, reading is good. In fact, there is nothing wrong with the distribution of decoration, which is nothing more than installing a lamp and several sockets. Lights are single-pole and double-throw, that is, two switches control a light or multiple switches control a light. The simplest thing is that a switch controls a lamp. There are sockets to select the cross section of the conductor according to the power of the electrical appliances used. For example, this socket should be equipped with 1.5P air conditioner, so the conductor should be a 2.5 or 4 square copper conductor master switch. It is best to use a single air-conditioning circuit switch above 10A, so the books I suggest you read are all basic things, and also involve the methods and theories used in decorating the house. It is good to practice more. It's better to have an old man with it, because it will be charged. Good luck. If you have any questions, I am willing to give you a satisfactory answer. I hope to adopt.