Reader question and answer Netizen Xiaohua: How to avoid the misunderstanding of the second-hand house? Cui Tao (current manager of the decoration engineering department): After the long-term residence of the old house, the water circuit has serious aging, and the hydropower transformation of the new house is more complicated. It is necessary to remember to ask the decoration team for the layout of the water and electricity, and to grasp the situation of the hydropower lines before and after the renovation, so that it can be repaired in the future. In the old house of the 1990s, the socket and the lighting were mixed with a circuit. The wire was an aluminum core wire or a 1.5 square copper core wire. When several appliances were turned on at the same time or an electrical device leaked, the main gate jumped. As a result, other electrical appliances are not working properly. In addition, the circuits of these old houses have no grounding protection, and can not effectively prevent the accidental damage caused by leakage of the circuit after aging or short circuit, and need to be completely modified. The distribution box settings of the old house are generally old, the loop is too simple, and the power ratio of each loop is not reasonable. It is necessary to plan a safe and reasonable circuit design according to the power of all the power equipment. Ideally, there should be five switching circuits in the distribution box: main switch, air conditioner, kitchen and bathroom socket, lighting, and ordinary socket. If there is a quick-heating water heater, a separate circuit of 6 square copper wire is required. At the end of the last century, some of the old buildings' strong electricity systems have been subjected to capacity enhancement. The capacity expansion is generally limited to air-conditioning circuits, which basically guarantees their use. However, most of these capacity-increasing cable traces are routed by the trunk line or directly outside the wall with the three-phase sheathed wire, which has a serious impact on the overall aesthetics of the wall surface and needs to be converted into a dark line. As more and more fixtures and appliances are used in each home renovation, there are many places where switches and sockets need to be placed. Before the decoration, it is necessary to do the wiring work in advance, and what places need to be placed in the electrical equipment should be planned in advance, the reserved switches and sockets of the old house are generally not enough. In general, a room must have at least 3 outlets, a good two-bedroom home with no fewer than 15 outlets, and no fewer than eight switches. In addition, the switch height of the same room should be consistent. The lower part of the switch is 1.4 meters from the ground and the lower part of the socket is 0.3 meters from the ground. All switch settings should meet the ergonomic requirements.
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