Earth Cable Size Selection Chart — !!install!!
This is the "shortcut" method. For smaller installations, you simply match the earth wire to the phase wire size up to 16mm². For cables larger than 35mm², the earth wire is generally required to be at least half the size of the phase wire. 2. The Adiabatic Equation (The Calculation Method)
Charts may not account for extremely long cable runs where voltage drop or impedance becomes a factor.
A chart for copper might not be accurate for aluminum conductors. Expert Tip: The Adiabatic Equation
Before you look at the chart, you must understand why the sizes are chosen. According to international standards, the cross-sectional area (CSA) of the earth conductor must satisfy two conditions:
Cable Size Calculator - Cable sizing and selection | 12 Volt Planet
This is the "shortcut" method. For smaller installations, you simply match the earth wire to the phase wire size up to 16mm². For cables larger than 35mm², the earth wire is generally required to be at least half the size of the phase wire. 2. The Adiabatic Equation (The Calculation Method)
Charts may not account for extremely long cable runs where voltage drop or impedance becomes a factor.
A chart for copper might not be accurate for aluminum conductors. Expert Tip: The Adiabatic Equation
Before you look at the chart, you must understand why the sizes are chosen. According to international standards, the cross-sectional area (CSA) of the earth conductor must satisfy two conditions:
Cable Size Calculator - Cable sizing and selection | 12 Volt Planet
