A flexible cable may include an elongated shaped strip helically wound around itself to form a generally tubular body having at least one interior passageway and at least one conductor at least partially disposed within the interior passageway. The elongated shaped strip may include a non-rectangular cross-sectional thickness having a central portion disposed between a first and a second end portion. The first and second end portions may extend generally outwardly from the central portion from generally opposite sides. At least a portion of the central portion may include a cross-sectional thickness T.sub.C which is less than a maximum cross-sectional thickness T.sub.M of the elongated shaped strip. The first and second end portions may include a first and a second cross-section thickness T.sub.S1, T.sub.S2, respectively, wherein at least one of the first and second cross-section thicknesses T.sub.S1, T.sub.S2 is greater than the cross-sectional thickness T.sub.C.