Cablecalc Bs7671 [extra Quality] -

Minimum earth conductor size by (Regulation 543.1.3): [ S = \frac\sqrtI_k^2 \times tk ] Where:

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Selects the precise reference method (e.g., Method A, B, C, or F) to determine base current-carrying capacities. 3. Voltage Drop Compliance Minimum earth conductor size by (Regulation 543