This article describes electrical series circuits RC and RL using the concept of derivative with two fractional orders a and b in Liouville-Caputo sense. The fractional equations consider derivatives in the range of a, b 2 (0; 1. Numerical solutions are presented considering different source terms introduced in the fractional equation. This new approach considers electrical elements with two different properties. In addition, we prove that if a = 0, the fractional derivative with Mittag-Leffler kernel in Liouville-Caputo sense is recovered, and when b = 0, the Liouville-Caputo fractional derivative is recovered.