Franklin 2007 manual 120, 180, 250, 170 270, 110, 160

Application – Single-Phase Motors

2 or 3-Wire Cable, 60 Hz (Service Entrance to Motor - Maximum Length In Feet)

Table 11															60 °C
	MOTOR RATING							60 °C INSULATION - AWG COPPER WIRE SIZE
VOLTS		HP	KW	14	12	10	8	6	4	3	2	1	0	00	000	0000
115	1/2		.37	100	160	250	390	620	960	1190	1460	1780	2160	2630	3140	3770
	1/2		.37	400	650	1020	1610	2510	3880	4810	5880	7170	8720
	3/4		.55	300	480	760	1200	1870	2890	3580	4370	5330	6470	7870
	1		.75	250	400	630	990	1540	2380	2960	3610	4410	5360	6520
	1.5		1.1	190	310	480	770	1200	1870	2320	2850	3500	4280	5240
230	2		1.5	150	250	390	620	970	1530	1910	2360	2930	3620	4480
	3		2.2	120	190	300	470	750	1190	1490	1850	2320	2890	3610
	5		3.7	0	0	180	280	450	710	890	1110	1390	1740	2170	2680
	7.5		5.5	0	0	0	200	310	490	610	750	930	1140	1410	1720
	10		7.5	0	0	0	0	250	390	490	600	750	930	1160	1430	1760
		15	11	0	0	0	0	170	270	340	430	530	660	820	1020	1260

Table 11A															75 °C
	MOTOR RATING							75 °C INSULATION - AWG COPPER WIRE SIZE
VOLTS		HP	KW	14	12	10	8	6	4	3	2	1	0	00	000	0000
115	1/2		.37	100	160	250	390	620	960	1190	1460	1780	2160	2630	3140	3770
	1/2		.37	400	650	1020	1610	2510	3880	4810	5880	7170	8720
	3/4		.55	300	480	760	1200	1870	2890	3580	4370	5330	6470	7870	9380
	1		.75	250	400	630	990	1540	2380	2960	3610	4410	5360	6520	7780	9350
	1.5		1.1	190	310	480	770	1200	1870	2320	2850	3500	4280	5240	6300	7620
230	2		1.5	150	250	390	620	970	1530	1910	2360	2930	3620	4480	5470	6700
	3		2.2	120	190	300	470	750	1190	1490	1850	2320	2890	3610	4470	5550
	5		3.7	0	110	180	280	450	710	890	1110	1390	1740	2170	2680	3330
	7.5		5.5	0	0	120	200	310	490	610	750	930	1140	1410	1720	2100
	10		7.5	0	0	0	160	250	390	490	600	750	930	1160	1430	1760
	15		11	0	0	0	0	170	270	340	430	530	660	820	1020	1260

1 Foot = .3048 Meter

Lengths in BOLD only meet the US National Electrical Code ampacity requirements for individual conductors 60 °C or 75 °C in free air or water, not in magnetic enclosures, conduit or direct buried.

Lengths NOT in bold meet the NEC ampacity requirements for either individual conductors or jacketed 60 °C or 75 °C cable and can be in conduit or direct buried. Flat molded and web/ribbon cable are considered jacketed cable.

If any other cable is used, the NEC and local codes should be observed.

Cable lengths in tables 11 & 11A allow for a 5% voltage drop running at maximum nameplate amperes. If 3% voltage drop is desired, multiply table 11 and 11A lengths by 0.6 to get maximum cable length.

The portion of the total cable length, which is between the supply and single-phase control box with a line contactor, should not exceed 25% of total maximum allowable to ensure reliable contactor operation. Single- phase control boxes without line contactors may be connected at any point in the total cable length.

Tables 11 & 11A are based on copper wire. If aluminum wire is used, it must be two sizes larger than copper wire and oxidation inhibitors must be used on connections.

EXAMPLE: If tables 11 & 11A call for #12 copper wire, #10 aluminum wire would be required.

Contact Franklin Electric for 90 °C cable lengths. See pages 15, 48, and 49 for applications using 230 V motors on 208 V power systems.

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