List of the Top 1 Free Electrical Design Software in 2026

CableCalc BS7671 is an advanced software tool tailored for electrical design and calculations, fully adhering to the latest BS7671:2018+A2:2022 standards, also referred to as IET Wiring Regulations 18th Edition Amendment 2, which aids electrical experts in the precise sizing of cables, evaluating circuits, and devising distribution board projects. The program is proficient in executing calculations for both single-phase and three-phase setups, covering a variety of circuit types such as radial, ring, and sub-main configurations; it determines essential parameters like voltage drop, disconnection times, fault currents, earth fault values, overload contingencies, and short-circuit metrics, while factoring in correction elements such as temperature changes and cable grouping. With its comprehensive databases of copper cables and protective devices, it streamlines the selection process for users and features robust tools for generating detailed documentation, including calculation reports, schedules, single-line diagrams, and schematic drawings, making it applicable to a wide range of projects from simple circuits to intricate multi-distribution board systems. Moreover, the software's intuitive interface allows both experienced professionals and newcomers to electrical design to use it efficiently, thereby improving productivity and precision in electrical installation tasks. This adaptability ensures that users can confidently tackle diverse project requirements, making CableCalc an invaluable resource in the field of electrical engineering.