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With the proliferation of underground systems and technologies, the investigation of thermal fields in the soil has become a subject of great attention in the emerging technology of buried structures. In this work, the heat transfer mechanisms in underground cable installations have presented. This paper considers a system of the underground cable of 12/20 (24) kV single core cable with a copper conductor and XLPE insulation, located in three models were designated for the experiment, a cable was located in (sand, PVC pipe, and an aluminum pipe). Furthermore, its reviews the results were obtained from a laboratory model where a wooden box was used, and the cable was placed inside the box by burying the cable in three different designs and using the soil used in Iraq and obtained a good results and comparisons were made at each model.

The effects of sand and pipes on the temperature distributions of the underground cable