In all types of industrial and civil buildings or structures, there is life, production or water supply and drainage, heating and ventilation equipment required electricity are electrical design range. ①change, power distribution design. Also known as power supply design, refers to the high and low voltage change, distribution, accident emergency power supply design. ② power design. Also known as the design of power equipment, refers to the power plant design and commercial buildings in all electrical equipment distribution design, construction design, electronic computers, all kinds of small appliances and other special equipment, power design. ③ lighting design. Refers to the indoor general lighting, local lighting, maintenance lighting, accident lighting, evacuation-induced lighting in the fire, outdoor road lighting, garden lighting, security lighting, aviation obstruction lights, building facade lighting, Stage lighting, stadium lighting design. ④ automatic control and signal design. For some special requirements of industrial and civilian housing such as: interlocking control requirements of the production line, the production of contact signals, service call signal, air conditioning control systems, high-rise building fire alarm and fire automatic control system, thermal instrumentation testing And control systems and other various stand-alone automation, group-machine centralized control, the use of computer-based power equipment operation and management and business management and other aspects of the design. ⑤ telecommunications design. Refers to the design of such aspects as telephone, cablecasting, venue sound reinforcement, DC-DC, telex, cable, CCTV and shared TV antenna systems. ⑥ indoor and outdoor distribution line design. Outdoor lines are overhead lines and cable points, the indoor lines are clear lines (porcelain, plastic wire folder wiring; porcelain beads, porcelain cabling; pipe Ming line; cable cabling; cable bridge cabling and workshop bare mother line, etc.), dark lines , Plastic pipe dark wiring; porous rectangular metal or plastic wire slot dark wiring; cable laying in the trench or the tunnel dark, etc.), the wire type and cross section of the choice and what kind of wiring depends on: the voltage level, the environment Features (temperature, humidity, pressure, salt spray, chemical corrosion, fire protection, explosion proof, shock proofing, etc.), allowing loads, voltage and energy losses, mechanical strength, short circuit and overload protection. ⑦ building lightning protection and power equipment over-voltage protection design. It refers to lightning protection design of industrial and civil buildings, towering structures, high-rise buildings and lightning protection design of power facilities such as transformers, rotating electrical machines and overhead lines. ⑧ ground design. Refers to the distribution transformer low-voltage side of the work of the grounding point, the protective grounding of electrical equipment metal shell, electrical wiring repeated grounding, lightning protection of buildings and structures and grounding of special electrical equipment, such as design. ⑨ fire, explosion-proof design. It refers to the design of fire protection and explosion proof of electrical equipment and electrical circuits in places where there is danger of fire or explosion. ⑩ Earthquake, seismic design. It refers to the earthquake and seismic design of the electrical equipment and the electrical circuit itself in the earthquake area according to the seismic intensity required by the fortification. Other security design. With the development and application of electronic technology, the popularization of plastic products, the automation of production processes and the appearance of large-scale thyristor rectifiers, safety protection facilities such as electromagnetic shielding, anti-static and anti-high-order harmonics are sometimes taken into consideration. According to the "Residential Design Code" (GB50096-2011) jointly issued by the Ministry of Housing and Urban-Rural Development and the General Administration of Quality Supervision, Inspection and Quarantine, residences shall be designed in sets. Each residence shall have a bedroom, living room (hall), kitchen and bathroom Functional space.