An energy cable includes at least one electrical conductor and at least one extruded coating layer including a thermoplastic polymer material in admixture with a dielectric fluid, wherein the dielectric fluid includes a compound of formula (I): X-A-X′; where A is a monocyclic aromatic moiety or an at least partially aromatic condensed polycyclic moiety; and at least one of X and X′ is methyl or an aliphatic moiety, in both cases optionally substituted with and/or interrupted by one or more of keto, alkoxy, alkylthio, mercapto, hydroxyalkyl, hydroxyl; the other being hydrogen; the compound having a ratio of number of aromatic carbon atoms to total number of carbon atoms greater than or equal to 0.6.