Investigation on Ampacity for Direct Burial Low-Voltage Power Cables
Description
Generally, cable ampacity is the physically allowable continuous current that a cable can carry under real installation conditions. Allowable continuous current is the current in a conductor limited by the temperature rise in the insulation. Cable ampacity for low-voltage systems is defined by various standards. In addition, most manufacturers provide their own user guides. Today, cable ampacity analyses are commonly performed using different software tools. Although cable ampacity results should be unique, variations may occur that can significantly affect cable health and service life. These differences arise from variations in the current calculations. Software analysis is numerical, and calculations using standards are analytical. The objective of this paper is to compare real cable ampacity values obtained through software modeling with those calculated using standards and manufacturers’ guidelines. The paper deals with direct-buried cables. The differences in cable ampacity are calculated and presented. Multiple case studies were analyzed. For direct-buried cables, the ampacity values derived from the reviewed standards, manufacturers’ user guides, and software models are similar across the case studies, with deviations of no more than 4%. Furthermore, numerical cable ampacity analysis accounting for load factors (dynamic loading) and soil thermal resistivity was performed for direct-buried cable systems. It is concluded that these two factors significantly influence cable ampacity.
Originally published in: International Journal of Innovative Solutions in Engineering (IJISE), Vol. 2, No. 2, 2026. Official URL: https://ijise.ba/article/18/
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- Journal article: 3029-3200 (ISSN)
References
- "Electric cables - calculation of the current rating. Part 1 1: Current rating equations (100 % load factor) and calculation losses General," Edition 3.0., in International standard / IEC, no. 60287., Geneva, Switzerland: International Electrotechnical Commission, 2023.
- G. J. Anders, Rating of electric power cables: ampacity computations for transmission, distribution, and industrial applications. in IEEE Press power engineering series. Piscataway, NJ: IEEE Press, 1997.
- J. Nahman and M. Tanaskovic, "Determination of the current carrying capacity of cables using the finite element method,"Electric Power Systems Research, vol. 61, no. 2, pp. 109–117, Mar. 2002, doi: https://doi.org/10.1016/S0378-7796(02)00003-2.
- J. Zuniga and S. Kung, "Underground DC Cable Sizing with Cyclical Loading in Utility-Scale Solar Applications," in 2024 IEEE 42nd Central America and Panama Convention (CONCAPAN XLII), San Jose, Costa Rica: IEEE, Nov. 2024, pp. 1–5. doi: https://doi.org/10.1109/CONCAPAN63470.2024.10933855.
- D. Aegerter and M. Charlesworth, "Comparing current ratings for buried cables from ampacity tables under application of correction factors with results from calculations according to IEC 60287," in Jicable'23 - 11th International Conference on Power Insulated Cables, Lyon - France, 2023.
- F. de Leon, "Major factors affecting cable ampacity," in 2006 IEEE Power Engineering Society General Meeting, Jun. 2006, p. 6 pp.-. doi: https://doi.org/10.1109/PES.2006.1708875.
- R. Benato, L. Colla, S. D. Sessa, and M. Marelli, "Review of high current rating insulated cable solutions, "Electric Power Systems Research, vol. 133, pp. 36–41, Apr. 2016, doi: https://doi.org/10.1016/j.epsr.2015.12.005.
- "Cableizer - Cableizer." Accessed: Feb. 18, 2026. [Online]. Available: https://www.cableizer.com/
- D. Klimenta, M. Sucurovic, and D. Tasic, "Amendments to some IEC TR 62095 Recommendations for Underground Single-Core Power Cables in Trefoil Formation,"ICCK Transactions on Electric Power Networks and Systems, vol. 1, no. 1, pp. 38–49, Oct. 2025, doi: https://doi.org/10.62762/TEPNS.2025.641725.
- "DIN VDE 0276 Cable | Eland Cables." Accessed: Feb. 18, 2026. [Online]. Available: https://www.elandcables.com/electrical-cable-and-accessories/cables-by-standard/vde0276-cable
- P. Möbius, L.-H. Michael, M. Plenz, J. Schräder, and D. Schulz, "Energy cable ampacity: Impact of seasonal and climate-related changes,"Renewable and Sustainable Energy Reviews, vol. 212, p. 115348, Apr. 2025, doi: https://doi.org/10.1016/j.rser.2025.115348.
- F. Aras, C. Oysu, and G. Yilmaz, "An Assessment of the Methods for Calculating Ampacity of Underground Power Cables, "Electric Power Components and Systems, vol. 33, no. 12, pp. 1385–1402, Dec. 2005, doi: https://doi.org/10.1080/15325000590964425.
- D. Enescu, P. Colella, and A. Russo, "Thermal Assessment of Power Cables and Impacts on Cable Current Rating: An Overview, "Energies, vol. 13, no. 20, p. 5319, Oct. 2020, doi: https://doi.org/10.3390/en13205319.
- D. Enescu, A. Russo, R. Porumb, and G. Seritan, "Dynamic Thermal Rating of Electric Cables: A Conceptual Overview," in 2020 55th International Universities Power Engineering Conference (UPEC), Torino, Italy: IEEE, Sep. 2020, pp. 1–6. doi: https://doi.org/10.1109/UPEC49904.2020.9209809.
- J. H. Neher and M. H. McGrath, "The calculation of the temperature rise and load capability of cable systems, "Trans. AIEE, Part III: Power Appar. Syst., vol. 76, no. 3, pp. 752–764, Apr. 1957, doi: https://doi.org/10.1109/AIEEPAS.1957.4499653.