This guide explains how to choose the correct earth cable size based on electrical standards (primarily and US NEC ), the factors that influence sizing, and a reference chart for common applications.
Before starting your project, always check your local building codes (like the in the US or BS 7671 in the UK). While charts provide a great starting point, a qualified electrician may use the adiabatic equation ( earth cable size chart
The earth wire should be the same size as the phase wire. 16 mm² < S ≤ 35 mm²: The earth wire should be 16 mm² . This guide explains how to choose the correct