CableCalc BS7671 is a sophisticated software solution for electrical calculation and design, fully compliant with the most recent BS7671:2018+A2:2022 standards governing electrical installations, also known as IET Wiring Regulations 18th Edition Amendment 2, which assists electrical professionals in accurately sizing cables, assessing circuits, and designing distribution board projects. The software is adept at handling calculations for both single-phase and three-phase systems, encompassing various types of circuits including radial, ring, and sub-main configurations; it computes critical parameters such as voltage drop, disconnection times, fault currents, earth fault values, overload contingencies, and short-circuit metrics, while also accounting for correction factors like temperature variations and cable grouping. With extensive databases of copper cables and protective devices, it simplifies the selection process for users and includes powerful tools for producing detailed documentation like calculation reports, schedules, single-line diagrams, and schematic drawings, making it suitable for projects that range from basic circuits to complex multi-distribution board setups. Furthermore, its user-friendly interface ensures that both seasoned professionals and those new to electrical design can navigate the software with ease, enhancing productivity and accuracy in electrical installation projects.