In this article, we will focus on cable accessories with a capacitive control method. It examines the key aspects of modeling the structure of the control field, made in the form of silicone stress cone connecting cable joint. The analysis is conducted with help a computer simulation using the finite element method in Elcut professional program. The article defines the problem areas in a design. Dependence to the electric field intensity calculated in the problem areas of the characteristic geometric and physical parameters of the stress cone. Recommendations give for optimal distribution pattern of the electric field in the cable cutting.