Earthing Cable Size Calculator

$$S = \frac\sqrtI^2 \times tk$$

For IT earthing (clean earths) or lightning protection, the size calculation changes. Lightning protection earths must handle massive impulse currents, often requiring a minimum of 25mm² or 50mm² copper strip, regardless of the power cable size. A standard calculator for power circuits will not suffice for lightning protection—ensure you are using the correct tool for the job. earthing cable size calculator

S=1,0002×1143=6.99 mm2cap S equals the fraction with numerator the square root of 1 comma 000 squared cross 1 end-root and denominator 143 end-fraction equals 6.99 mm squared You would round up to the nearest standard size, such as a cable. 3. Common Earth Cable Sizes by Application how to calculate Earthing conductor size $$S = \frac\sqrtI^2 \times tk$$ For IT earthing