Motor amps by horsepower, single-phase and three-phase
Verified against NEC 2023, checked against the 2026 edition · Last checked September 7, 2026
Pick a horsepower and get the full-load current at every table voltage, the 125% conductor minimum, the maximum inverse-time breaker and the wire size, each with its code section. Every number is computed from the same verified dataset that powers the JobVolt app, never typed by hand.
Single-phase motors
Table 430.248. 1/6 through 10 hp at 115, 200, 208 and 230 V.
Three-phase motors
Table 430.250. 1/2 through 200 hp at 200, 208, 230 and 460 V, squirrel-cage induction.
The 575 V column is on the Motor FLC tables page. Motors above 200 hp are not listed here.
Every motor here sizes in the app, offline.
JobVolt sizes the motor branch circuit from one input: table current, 125% conductor, the standard breaker or fuse, and the overload from the nameplate, each step cited. Then it exports inspector-ready PDF submittals.
