Select what to find and enter the other values.
Assumptions: This tool uses simplified calculation methods for quick reference. Actual electrical design depends on installation method, conductor type, ambient temperature, grouping, protective device characteristics, cable route, fault conditions and the regulations in force.
Safety notice: Guidance only. Electrical work must be designed, installed, inspected and tested by competent persons in accordance with applicable regulations and local requirements. Do not use this tool as a substitute for professional design, certification or inspection.