NEC 2026 Compatible

A 2 horsepower, 120-volt, single-phase motor has a nameplate full-load current of 24 Amperes. What is the maximum rating of a time-delay fuse permitted for short-circuit and ground-fault protection for this motor, assuming no special conditions?

Master LevelšŸ“‹ NEC 430.52(C)(1) and Table 430.52, NEC 240.6(A)Motor
Circuit Diagram
Motor Branch Circuit — NEC Article 430 PANEL 480V 3Φ DISC 430.109 ≄115% FLC OCPD Breaker 430.52 ≤250% FLC 125% FLC Conductors 430.22 OL 430.32 ≤125% FLC M Motor Sizing Summary (per NEC 430): 1. FLC from Table 430.248 (single-phase) or 430.250 (3-phase) 2. Conductors ≄ 125% Ɨ FLC [430.22] 3. OCPD ≤ 250% Ɨ FLC (inverse-time breaker) [430.52 Table] Key NEC References: 430.6 — Use nameplate for overloads, table FLC for OCPD/conductors 430.22 — Conductor sizing (125% of largest motor FLC) 430.52 — OCPD maximum ratings (Table 430.52) 430.32 — Overload protection (≤125% FLC for SF ≄1.15)
A

30 Amperes

B

40 Amperes

C

50 Amperes

D

60 Amperes

Explanation & Direct Citation

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