Nema Size Starters


Poly-Phase Motors Single Phase Motors Enclosures


 
3 Phase 
Nema 
Size
Maximum Horsepower Polyphase Motors
Full Voltage 
Starting		 Auto Transformer
Starting		 Part Winding
Starting		 Wye-Delta
Starting
200v
230v
 460v
575v		 200v 230v 460v
575v		 200v 230v 460v
575v		 200v 230v 460v
575v
00
1-1/2
1-1/2
2
--
--
--
--
--
--
--
--
--
0
3
3
5
--
--
--
--
--
--
--
--
--
1
7-1/2
7-1/2
10
7-1/2
7-1/2
10
10
10
15
10
10
15
2
10
15
25
10
15
25
20
25
40
20
25
40
3
25
30
50
25
30
50
40
50
70
40
50
75
4
40
50
100
40
50
100
75
75
150
60
75
150
5
75
100
200
75
100
200
150
150
350
150
150
300
6
150
200
400
150
200
400
--
300
600
300
350
700
7
--
300
600
--
300
600
--
450
900
500
500
1000
8
--
450
900
--
450
900
--
700
1400
750
800
1500
9
--
800
1600
--
800
1600
--
1300
2600
1500
1500
3000


Single Phase 
Nema 
Size
Maximum Horsepower
Single-Phase Motors 
Full-Voltage Starting
115v
230v
00
1/3
1
0
1
2
1
2
3
1-1/2
3
5
2
--
7-1/2
3
--
15


 
Enclosure
Type
Nema Enclosure
1 General Purpose- Indoor
2 Dripproof - Indoor
3 Dusttight, Raintight, Sleettight, - Outdoor
3R Rainproof, Sleet Resistant, Sleetproof - Outdoor
3S Dusttight, Raintight, Sleetproof - Outdoor
4 Watertight, Dusttight, Sleet Resistant - Indoor & Outdoor
4x Watertight, Dusttight, Corrosion-Resistant - Indoor & Outdoor
5 Dusttight - Indoor
6 Submersible, Watertight, Dusttight, Sleet Resistant - Indoor & Outdoor
7 Class I, Group A,B,C, or D Hazardous Locations, Air-Break - Indoor
8 Class I, Group A,B,C, or D Hazerdous Locations, Oil-Immersed -- Indoor
9 Class II, Group E,F or G Hazardous Locations, Air-Break -- Indoor
10 Bureau of Mines
11 Corrosion-Resistant and Dripproof, Oil-Immersed--Indoor
12 Industrial Use, Dusttight and Driptight -- Indoor Oiltight and Dusttight -- Indoor
13 Oiltight and Dusttight -- Indoor
Type IEC Enclosure
2,3 General Purpose-- Indoor
21,31 Dripproof--Indoor
34 Rainproof--Outdoor
65 Industrial Use
66 Seawater Tight
68 Submersible

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