2026-10-06T14:17:16Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34040490 2026-10-01T06:16:23Z category_26539 category_26461 category_26470 item_type_12 month_year_10_2026

Multi-constraint LV cable selection: a review-oriented algorithm from tabulated ampacity to a complete design decision Buchinskii, Evgenii (25153638) Engineering practice Electrical circuits and systems Electrical energy transmission, networks and systems LV cable selection IEC 60364 ampacity voltage drop overcurrent protection short-circuit withstand earth-fault loop governing constraint Low-voltage cable selection is often treated as an ampacity problem, although a final cable size is the result of several independent constraints. A cable may satisfy current-carrying capacity and still fail protective-device coordination, voltage drop, short-circuit thermal withstand, automatic disconnection under the minimum fault current, or conductor-specific requirements. This report presents a review-oriented workflow that treats each criterion as a separate lower bound on conductor size, identifies the largest lower bound, then performs a closing verification on the selected standard size. The method does not introduce new normative equations; its contribution is the ordering, integration and reporting of established checks so that the reason for the selected section remains visible. A worked 400 V three-phase feeder demonstrates the method using a synthetic but fully reproducible project dataset. Ampacity and overload coordination permit a 70 mm² copper phase conductor, short-circuit thermal withstand requires 95 mm², and voltage drop requires 120 mm²; the selected 120 mm² conductor therefore passes because the voltage-drop criterion governs. Sensitivity checks show how the governing criterion changes with route length and fault-clearing time. The method is intended for design calculations, cable schedules and review tools where the final section must be traceable to the constraint that actually forced it. 2026-10-01T06:16:23Z Text Preprint 10.6084/m9.figshare.34040490.v1 https://figshare.com/articles/preprint/Multi-constraint_LV_cable_selection_a_review-oriented_algorithm_from_tabulated_ampacity_to_a_complete_design_decision/34040490 CC BY 4.0