The power cables passing through penetration leads to growth of the thermal ageing mechanisms rate. The paper presents the results of the laboratory tests when the real environmental service conditions for penetration are simulated comparison with the result of the thermal computation of the power cables heating and of the temperature influence evaluation of temperature increase of the power cable components on the cable lifetime. For this particular case, a power cable with PVC insulation, we estimated a lifetime decrease about 20 years referring to lifetime (30÷40 years) for location in air.
 D. Comsa, Proiectarea instalatiilor electrice industriale, Editura Didactica si Pedagogica Bucuresti, 1983, p. 241;
 IAEA -TECDOC -1188, Assessment and management of ageing of major nuclear power plant components important to safety: In-containment instrumentation and control cables, Austria, December 2000, p 14; p.15;
 M. Bercovici, Wire nets -electric calculus, Technical Publishing Company, Bucuresti, 1974, p.155; p. 200-203; p. 212-215;
 D. Puiu, Costin Cepisca, Tiberiu Gyongyoşi, Gheorghe Deloreanu, Elena Dinu, Mathematical Model for Heat Transfer through Power Air-Laid Cable Insulation, NUCLEAR 2017 the 10th Annual International Conference on Sustainable Development through Nuclear Research and Education, 24-26 May 2017 Piteşti, România;
 Gh. Carabogdan, Instalaţii termice industriale – Culegere de probleme pentru ingineri, Editura tehnică Bucureşti 1983, pag. 32;
 Guy Van der Veken, Determining high voltage cable conductor temperatures, Euromold, Belgium;
 Florian Loos, Karl Dvorsky and Hans-Dieter Liess, Determination of temperature in high-voltage cables of finite length with, dynamic current profiles, Mathematical and Computer Modelling of Dynamical Systems, Vol. 00, No. 00, June 2013, 1–18;
 Murat Karahan and Özcan Kalenderli, Coupled Electrical and Thermal Analysis of Power Cables Using Finite Element Method, www.intechopen.com;
 M. Rasoulpoor, M. Mirzaie and S. M. Mirimani, Electrical and Thermal Analysis of Single Conductor Power Cable Considering the Lead Sheath Effect Based on Finite Element Method, Iranian Journal of Electrical & Electronic Engineering, 2016. Paper received 25 November 2015 and accepted 10 February 2016;
 Dissertation Universität der Bundeswehr München Eingereicht, Analytical and numerical analysis and simulation of heat transfer in electrical conductors and fuses;
 I. Sarajcev, M. Majstovic, I. Medic, Calculation of losses in electric power cables as the base for cable temperature analysis.