There is little difference between the laying of AC cables and the laying of general power systems. DC cables are mostly used between photovoltaic modules, between strings and DC combiner boxes, and between combiner boxes and inverters. The cross-sectional area is small and the number is large. Generally, the cables are bundled along the module brackets or laid directly through pipes. , DC cables generally need to be considered when laying:

      (1) Connecting cables between components and connecting cables between strings and combiner boxes, as far as possible, using component brackets as channel support and fixing for cable laying can reduce the effect of environmental factors to a certain extent.

      (2) The force of cable laying should be even and appropriate, and should not be too tight. The temperature difference between day and night is generally large in the photovoltaic field, and thermal expansion and contraction should be avoided to cause the cable to break.

      (3) For the cable leads of photovoltaic materials on the surface of the building, the overall aesthetics of the building should be considered. The laying position should avoid laying cables on the sharp edges of the walls and brackets to avoid cutting, abrading and damaging the insulating layer, causing short circuits, or cutting by shear The wire caused an open circuit. At the same time, it is necessary to consider problems such as direct lightning strikes on the cable line. 

      (4) Reasonably plan cable laying paths, reduce crossing, and combine laying as much as possible to reduce the amount of earth excavation and the amount of cables in the project construction process.

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