Meter box and SPDU are an important part of the power system and usually must be installed in the following key locations: 1. Residential and commercial buildings: used to measure and monitor power usage to ensure accurate billing and power safety. 2. Industrial facilities: Monitor large-scale production equipment and power systems to achieve precise management and control. 3. Public facilities: such as schools, hospitals, office buildings, etc., to ensure reasonable distribution and supervision of electricity use. 4. Power stations and substations: used to monitor the power generation and power transmission processes to ensure the stable operation of the system. 5. Outdoor electrical equipment: such as street lights, billboards, etc., used to measure and manage outdoor electricity. In general, meter box and SPDU play an important role in monitoring, metering and safety control in various places.