Cable Calculator Free

Cable Calculator Free is a specialized tool designed to assist electricians and engineers by providing accurate cable size calculations adhering to BS 7671: 2008 Amd 1: 2011 standards. The core functionality of this app is divided into two main sections. The first section focuses on calculating the appropriate size for a phase conductor. It considers various correction factors like temperature, grouping, insulation, and protection requirements, ensuring a suitable cable choice for the calculated current carrying capacity. Additionally, the app automatically adjusts the cable size based on voltage drop considerations.

Advanced CPC Calculations

The second section of Cable Calculator Free calculates the minimum required circuit protective conductor (CPC) size. It applies correction factors for ambient temperature and factors in the maximum rated Zs of protective devices, along with resistance calculations for the conductors (R1 + R2). This section is crucial for determining earth fault loop impedance (Zs), fault current, and disconnection times, selecting a suitable CPC size up to 16mm. It also calculates the minimum armor size for cables when using steel wire armored (SWA) options, enhancing the reliability of your electrical installations.

Broad Compatibility and Usability

Cable Calculator Free is optimized for domestic single-phase supplies using various cable types, including PVC 70°C flat sheathed cables, PVC multicore cables, PVC single core cables, and PVC SWA cables, supporting sizes up to 25mm. It accommodates different installation methods and provides calculations for protective devices like BS3036 semi-enclosed fuses and MCBs. Designed for larger mobile devices such as tablets, it ensures easy access to calculations on the go.

Cable Calculator Free draws its data from the latest edition of the On Site Guide and BS standards, ensuring you have the most up-to-date information at your fingertips for your electrical engineering needs.