Formula
FLC × 1.25 = wire ampacity · FLC × 2.5 = breaker · FLC × 1.75 = TD fuse · FLC × 1.15–1.25 = overloadUnit
NEC table range @ 230 V: 0.5–200 HP
Full-Load Current (FLC)
28.0A
NEC 430.250 · 10 HP @ 230 V
Conductor (Cu, 75°C THWN)
10 AWGrated 35 A
Branch-circuit min: 35.0 A (125% FLC, NEC 430.22)
Branch-Circuit Protection (NEC 430.52)
Inverse-Time Breaker
70 A
250% FLC
Dual-Element Fuse
50 A
175% FLC
Non-Time-Delay Fuse
90 A
300% FLC
Overload Relay (NEC 430.32)
32.2 – 35.0 A
115% FLC (SF < 1.15) · 125% FLC (SF ≥ 1.15 or 40°C rise)
NEMA Starter Size
Size 2
Magnetic across-the-line starter (typical compressor duty)
Reference values from NEC 430.248 / 430.250 (FLC), 310.16 (75°C Cu ampacity), 430.22 (branch ampacity), 430.52 (max OCPD), 430.32 (overload), 240.6 (standard OCPD sizes). FLC values between table HP entries are linearly interpolated — for sizing decisions, round up to the next standard motor HP per NEC 430.6(A)(1). Always verify with the AHJ and motor nameplate.