With the widespread application of solar energy, the demand for solar cables is growing. There are many types of photovoltaic cables on the market. Some photovoltaic cables are pure copper conductors or aluminum conductors, PVC insulation and sheaths. Some PV cables are tinned copper conductors, XLPE insulation and sheaths. Some solar cables have armored sheaths. Photovoltaic cables with armored sheaths are suitable for direct burial.
There are also installation requirements for burial, and the National Electrical Code (NEC) specifies minimum burial depths for different types of wiring. For direct burial cables such as PV wires, the typical depth is 18 inches below the ground surface. Local codes may have other requirements. Although some solar cables are rated for direct burial, it is generally recommended to run them through conduit to provide additional protection from physical damage, moisture, and pests. Conduit should be buried at the depth specified by the NEC and local codes, typically 18 inches for rigid metal conduit and 24 inches for PVC conduit.
Solar cables should also be considered environmental factors, taking soil conditions into account. Rocky or abrasive soils may require additional protection, such as conduit, to prevent cable damage. In addition, the burial site has appropriate drainage systems to prevent water from pooling around the cable, even if the cable is rated for wet conditions.