Franklin 2007 manual Application Three-Phase Motors

Application – Three-Phase Motors

Table 16 Three-Phase 60 °C Cable, 60 Hz (Service Entrance to Motor) Maximum Length in Feet																			60 °C
MOTOR RATING						60 °C INSULATION - AWG COPPER WIRE SIZE											MCM COPPER WIRE SIZE
VOLTS	HP	KW	14	12	10	8	6	4	3	2	1	0	00	000	0000	250	300	350	400	500
	1/2	0.37	710	1140	1800	2840	4420
	3/4	0.55	510	810	1280	2030	3160
	1	0.75	430	690	1080	1710	2670	4140	5140
	1.5	1.1	310	500	790	1260	1960	3050	3780
200 V	2	1.5	240	390	610	970	1520	2360	2940	3610	4430	5420
	3	2.2	180	290	470	740	1160	1810	2250	2760	3390	4130
60 Hz
			110
Three-	5	3.7		170	280	440	690	1080	1350	1660	2040	2490	3050	3670	4440	5030
Phase	7.5	5.5	0	0	200	310	490	770	960	1180	1450	1770	2170	2600	3150	3560
3 - Lead
	10	7.5	0	0	0	230	370	570	720	880	1090	1330	1640	1970	2390	2720	3100	3480	3800	4420
	15	11	0	0	0	160	250	390	490	600	740	910	1110	1340	1630	1850	2100	2350	2570	2980
	20	15	0	0	0	0	190	300	380	460	570	700	860	1050	1270	1440	1650	1850	2020	2360
	25	18.5	0	0	0	0	0	240	300	370	460	570	700	840	1030	1170	1330	1500	1640	1900
	30	22	0	0	0	0	0	0	250	310	380	470	580	700	850	970	1110	1250	1360	1590
	1/2	0.37	930	1490	2350	3700	5760	8910
	3/4	0.55	670	1080	1700	2580	4190	6490	8060	9860
	1	0.75	560	910	1430	2260	3520	5460	6780	8290
	1.5	1.1	420	670	1060	1670	2610	4050	5030	6160	7530	9170
230 V	2	1.5	320	510	810	1280	2010	3130	3890	4770	5860	7170	8780
	3	2.2	240	390	620	990	1540	2400	2980	3660	4480	5470	6690	8020	9680
60 Hz
			140
Three-	5	3.7		230	370	590	920	1430	1790	2190	2690	3290	4030	4850	5870	6650	7560	8460	9220
Phase	7.5	5.5	0	160	260	420	650	1020	1270	1560	1920	2340	2870	3440	4160	4710	5340	5970	6500	7510
3 - Lead
	10	7.5	0	0	190	310	490	760	950	1170	1440	1760	2160	2610	3160	3590	4100	4600	5020	5840
	15	11	0	0	0	210	330	520	650	800	980	1200	1470	1780	2150	2440	2780	3110	3400	3940
	20	15	0	0	0	0	250	400	500	610	760	930	1140	1380	1680	1910	2180	2450	2680	3120
	25	18.5	0	0	0	0	0	320	400	500	610	750	920	1120	1360	1540	1760	1980	2160	2520
	30	22	0	0	0	0	0	260	330	410	510	620	760	930	1130	1280	1470	1650	1800	2110
	1/2	0.37	2690	4290	6730
	3/4	0.55	2000	3190	5010	7860
	1	0.75	1620	2580	4060	6390	9980
	1.5	1.1	1230	1970	3100	4890	7630
	2	1.5	870	1390	2180	3450	5400	8380
	3	2.2	680	1090	1710	2690	4200	6500	8020	9830
	5	3.7	400	640	1010	1590	2490	3870	4780	5870	7230	8830
	7.5	5.5	270	440	690	1090	1710	2640	3260	4000	4930	6010	7290	8780
	10	7.5	200	320	510	800	1250	1930	2380	2910	3570	4330	5230	6260	7390	8280	9340
380 V	15	11	0	0	370	590	920	1430	1770	2170	2690	3290	4000	4840	5770	6520	7430	8250	8990
60 Hz	20	15	0	0	0	440	700	1090	1350	1670	2060	2530	3090	3760	4500	5110	5840	6510	7120	8190
Three-
	25	18.5	0	0	0	360	570	880	1100	1350	1670	2050	2510	3040	3640	4130	4720	5250	5740	6590
Phase
3 - Lead	30	22	0	0	0	0	470	730	910	1120	1380	1700	2080	2520	3020	3430	3920	4360	4770	5490
	40	30	0	0	0	0	0	530	660	820	1010	1240	1520	1840	2200	2500	2850	3170	3470	3990
	50	37	0	0	0	0	0	0	540	660	820	1000	1220	1480	1770	2010	2290	2550	2780	3190
	60	45	0	0	0	0	0	0	0	560	690	850	1030	1250	1500	1700	1940	2150	2350	2700
	75	55	0	0	0	0	0	0	0	0	570	700	860	1050	1270	1440	1660	1850	2030	2350
	100	75	0	0	0	0	0	0	0	0	0	510	630	760	910	1030	1180	1310	1430	1650
	125	90	0	0	0	0	0	0	0	0	0	0	0	620	740	840	950	1060	1160	1330
	150	110	0	0	0	0	0	0	0	0	0	0	0	0	620	700	790	880	960	1090
	175	130	0	0	0	0	0	0	0	0	0	0	0	0	0	650	750	840	920	1070
	200	150	0	0	0	0	0	0	0	0	0	0	0	0	0	0	630	700	760	880

Lengths in BOLD only meet the US National Electrical Code ampacity requirements for individual conductors in free air or water. Lengths NOT in bold meet NEC ampacity requirements for either individual conductors or jacketed cable. See page 11 for additional details.

Continued on page 17 16