Baldor mn722 manual 230VAC Controls 3 Phase Wire Size and Protection Devices

Wire Size and Protection Devices

Table 3-5 230VAC Controls (3 Phase) Wire Size and Protection Devices

Control Rating		Input Breaker	Input Fuse (Amps)		Wire Gauge
Amps	HP	(Amps)	Fast Acting	Time Delay	AWG	mm2
3	0.75	7	5	4	14	2.5
4	1	7	6	5	14	2.5
7	2	15	12	9	14	2.5
10	3	15	15	12	14	2.5
16	5	20	25	20	12	3.31
22	7.5	30	35	30	10	5.26
28	10	40	45	35	8	8.37
42	15	60	70	60	6	13.3
54	20	70	80	70	6	13.3
68	25	90	100	90	4	21.2
80	30	100	125	110	3	26.7
104	40	150	175	150	1	42.4
130	50	175	200	175	1/0	53.5
145	60	200	225	200	2/0	67.4
192	75	250	300	250	4/0	107.0

Table 3-6460VAC Controls (3 Phase) Wire Size and Protection Devices

Control Rating		Input Breaker	Input Fuse (Amps)		Wire Gauge
		(Amps)
Amps	HP		Fast Acting	Time Delay	AWG	mm2
2	0.75	3	2	2	14	2.5
2	1	3	3	2.5	14	2.5
4	2	7	5	4.5	14	2.5
5	3	7	8	6.3	14	2.5
8	5	15	12	10	14	2.5
11	7.5	15	17.5	15	14	2.5
14	10	20	20	17.5	12	3.31
21	15	30	30	25	10	5.26
27	20	40	40	35	10	5.26
34	25	50	50	45	8	8.37
40	30	50	60	50	8	8.37
52	40	70	80	70	6	13.3
65	50	90	100	90	4	21.2
77	60	100	125	100	3	26.7
96	75	125	150	125	2	33.6
124	100	175	200	175	1/0	53.5
156	125	200	250	200	2/0	67.4
180	150	225	300	250	3/0	85.0
240	200	300	350	300	(2) 2/0	(2) 67.4
302	250	400	450	400	(2) 4/0	(2) 107.0
361	300	450	600	450	(3) 2/0	(3) 67.4
414	350	500	650	500	(3) 3/0	(3) 85.0
477	400	600	750	600	(3) 4/0	(3) 107.0
515	450	650	800	700	(3) 250MCM	(3) 127.0
590	500	750	900	800	(3) 300MCM	(3) 152.0

Note: All wire sizes are based on 75° C copper wire. Higher temperature smaller gauge wire may be used per NEC and local codes. Recommended fuses/breakers are based on 40° C ambient, maximum continuous control output current and no harmonic current.

MN722 Receiving & Installation 3-9