Cable Sizing Formula Info

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

But for sizing, we use the formula:

Short-circuit thermal check (k for Cu/PVC = 115): [ A_min = \frac10,000 \times \sqrt0.1115 \approx 27.5 \text mm^2 ] 25 mm² is slightly below → upgrade to 35 mm² for fault withstand. cable sizing formula