[ I = \fracV_dR_cable ]

[ I_req = \fracI_loadk_t \times k_g \times k_s \times \dots ] Step 3: Select Cable from Tables Choose a cable where ( I_rated \ge I_req ). Step 4: Check Voltage Drop Voltage drop formula (single-phase): [ V_d = 2 \times L \times I \times (R_ac \cos\phi + X \sin\phi) ]

From table — 25 mm² Cu/PVC (rated ~110 A in air at 30°C). Acceptable.

[ I_rated \ge I_load \times k_1 \times k_2 \times \dots \times k_n ]

[ I_req = 84.9 / 0.87 \approx 97.6 \text A ]

Voltage drop (use R=0.87 Ω/km, X=0.08 Ω/km for 25 mm²): [ V_d = \sqrt3 \times 0.1 \times 84.9 \times (0.87\times0.85 + 0.08\times0.526) \approx 11.8 \text V ] % drop = ( 11.8 / 400 \times 100 = 2.95% ) → OK (<5%).

[ V_d = \sqrt3 \times L \times I \times (R_ac \cos\phi + X \sin\phi) ]

[ A_min = \fracI_sc \times \sqrttk ]

Cable Sizing Formula -

[ I = \fracV_dR_cable ]

[ I_req = \fracI_loadk_t \times k_g \times k_s \times \dots ] Step 3: Select Cable from Tables Choose a cable where ( I_rated \ge I_req ). Step 4: Check Voltage Drop Voltage drop formula (single-phase): [ V_d = 2 \times L \times I \times (R_ac \cos\phi + X \sin\phi) ]

From table — 25 mm² Cu/PVC (rated ~110 A in air at 30°C). Acceptable. cable sizing formula

[ I_rated \ge I_load \times k_1 \times k_2 \times \dots \times k_n ]

[ I_req = 84.9 / 0.87 \approx 97.6 \text A ] [ I = \fracV_dR_cable ] [ I_req =

Voltage drop (use R=0.87 Ω/km, X=0.08 Ω/km for 25 mm²): [ V_d = \sqrt3 \times 0.1 \times 84.9 \times (0.87\times0.85 + 0.08\times0.526) \approx 11.8 \text V ] % drop = ( 11.8 / 400 \times 100 = 2.95% ) → OK (<5%).

[ V_d = \sqrt3 \times L \times I \times (R_ac \cos\phi + X \sin\phi) ] [ I_rated \ge I_load \times k_1 \times k_2

[ A_min = \fracI_sc \times \sqrttk ]