7
Motor
25 to 50 Feet
100 Feet
150 to 200 Feet
HP
200V
230V
460V
200V
230V
460V
200V
230V
460V
1/3
14
14(16)* 14(18)*
12
12
14(18)*
8
10
14(18)*
1/2
14
14(16)* 14(18)*
12
12
14(18)*
8
10
14(18)*
3/4
14
14(16)* 14(18)*
12
12
14(18)*
8
10
14(18)*
1
14
14(16)* 14(18)*
12
12
14(18)*
8
10
14(16)*
1 1/2
12
14
14(18)*
10
10
14(16)*
6
8
14
2
12
12
14(18)*
8
10
14(16)*
6
6
12
3
10
12
14(18)*
6
8
14
4
6
12
5
8
10
14(16)*
4
6
12
2
4
10
7 1/2
6
8
14
4
4
10
1
2
8
10
6
6
12
3
4
10
1/0
1
6
15
4
4
10
1
2
8
3/0
2/0
4
20
3
4
10
1/0
1
6
4/0
3/0
4
25
2
3
8
2/0
1/0
6
250kcmil
4/0
3
30
1
3
8
3/0
1/0
6
300kcmil
4/0
3
40
1/0
1
8
4/0
3/0
4
400kcmil 300kcmil
1
50
2/0
1
6
250kcmil
3/0
3
500kcmil 350kcmil
1
60
3/0
1/0
6
300kcmil
4/0
3
600kcmil 400kcmil
1/0
75
4/0
2/0
4
350kcmil 250kcmil
2
700kcmil 500kcmil
2/0
100 250kcmil
3/0
4
500kcmil 350kcmil
1
900kcmil 700kcmil
3/0
125 300kcmil
4/0
3
600kcmil 400kcmil
1/0
1250kcmil 800kcmil
4/0
150 350kcmil 250kcmil
2
700kcmil 500kcmil
2/0
1500kcmil 900kcmil 250kcmil
200 500kcmil 350kcmil
1/0
1250kcmil 800kcmil
4/0
1750kcmil 1250kcmil 350kcmil
250 600kcmil 400kcmil
2/0
1500kcmil 900kcmil 250kcmil 2000kcmil 1500kcmil 400kcmil
MOTOR MOUNTING
Motor must be securely fastened to a rigid, flat surface to prevent vibration and minimize noise.
For secure mounting use high-quality bolts of the largest possible diameter.
Belt-drive sheaves must be in-line. Use a straight edge to check. Do not over-tighten belts.
Direct coupled installations require a careful check of shaft and coupling alignment, shaft offset
and/or angular misalignment should be less than .002”. Shim motor base as necessary. Do not
depend on a flexible coupling to compensate for misalignment.
Table A - Minimum Wire Sizes for 3- Phase Motors
NOTE: kcmil denotes thousand circular mils. AWG sizes formerly given in MCM.
(*) Type S, SO, SJ, SJO, etc. flexible cable wire sizes. See NEC article 400 for ampacity.
