WebBecause this is a three-phase motor, look in Table 430.250 for this motor’s FLC. The FLC for a 10-hp, 208V, three-phase motor is 30.8A. Because the short-circuit and ground-fault protective device will be a circuit breaker, … WebAug 28, 2008 · The NEC is about the maximum level of protection. The manufacturers selection procedures take these limits into account. For the above manufacturer, if the motor is in an ambient 18?F warmer than the overload relay: for a service factor 1.15 to 1.25, use the motor FLC x .9 for a service factor 1.0, use motor FLC x .8
Sizing Circuit Protection and Conductors — Part 3 EC&M
WebMay 1, 2004 · Per Table 430.148, the FLC current is 34A. 34A×125%=43A. Per Table 310.16 (60°C terminals [110.14(C)(1)(a)]), the conductor must be a 6 AWG THHN rated 55A. Per the motor FLC listed in Table 430.52, size the branch-circuit short-circuit and ground-fault protection devices by using multiplication factors based on the type of motor … WebNov 26, 2003 · Charting a course through the largest chapter of the NEC. Mike Holt for EC&M Magazine ... size motor branch-circuit conductors no smaller than 125 percent of the motor FLC rating listed in Table 430.147 or 430.148 (Figure 430-4). Size the branch-circuit short-circuit and ground-fault protection device per 240.6(A) and 430.52(C)(1) Ex. 1. great wolf birthday cake
Motor full load current chart ElectricalSells
WebApr 1, 2004 · Step 1: Conductor sized no less than 125% of motor FLC. Step 2: Table 430.148 shows the FLC of 2-hp, 230V, single-phase as 12A. Step 3: 12A × 1.25 = 15A. Step 4: Per Table 310.16, you need to use 14 AWG THHN rated 20A at 60°C. The minimum size conductor the NEC permits for building wiring is 14 AWG [310.5]. However, local codes … WebJADE Learning Web29 rows · Note: For synchronous-type motors with 0.9 and 0.8 power factor, there amperes listed in the table should be multiplied by a factor of 1.1 and 1.25, respectively. Motor … great wolf blackstone