1. The scope of application of H1Z2Z2-K solar cables: places where electrical equipment is clustered, prosperous areas, important areas, main roads and areas with special requirements for urban planning and city appearance and environment. Areas with severe pollution and corrosion that are difficult to solve by technology, high reliability requirements for power supply or users with important loads, key scenic tourist areas, urban central areas with high load density, new residential areas and high-rise buildings with large construction areas.

      2. Selection of H1Z2Z2-K solar cables: determine the cross-section according to the long-term allowable current carrying capacity, select the cable cross-section according to the short-circuit thermal stability, select the cable cross-section according to the voltage drop of the connection loop, check the cross-section according to the mechanical strength, neutral wire, protective grounding wire, and protective grounding Selection of the cross-section of the sex line.

      3.Correction of ampacity of H1Z2Z2-K solar cables: long-term allowable ampacity temperature correction for cables, long-term allowable ampacity soil correction for H1Z2Z2-K solar cables, long-term allowable ampacity correction for direct-buried parallel laying power cables, and ampacity corrections for cable laying of 10kV and below through pipes.