Electrical Motors - NEMA Frame Assignments
NEMA frame assignments.
National Electric Manufacturers Association (NEMA) standardized frame assignments for
- single-phase motors horizontal and vertical
- polyphase squirrel-cage motors horizontal and vertical - open time
- polyphase squirrel-cage motors horizontal and vertical - fan-cooled
are indicated below:
Single-phase motors horizontal and vertical
Power (hp) | speed (rpm) | ||
---|---|---|---|
3600 | 1800 | 1200 | |
3/4 | - | - | 145T |
1 | - | 143T | 182T |
1 1/2 | 143T | 145T | 184T |
2 | 145T | 182T | - |
3 | 182T | 184T | - |
5 | 184T | 213T | - |
7 1/2 | 213T | 215T | - |
Polyphase squirrel-cage motors horizontal and vertical - open time
Power (hp) | speed (rpm) | |||
---|---|---|---|---|
3600 | 1800 | 1200 | 900 | |
1/2 | - | - | - | 143T |
3/4 | - | - | 143T | 145T |
1 | - | 143T | 145T | 182T |
1 1/2 | 143T | 145T | 182T | 184T |
2 | 145T | 145T | 184T | 213T |
3 | 145T | 182T | 213T | 215T |
5 | 182T | 184T | 215T | 254T |
7 1/2 | 184T | 213T | 254T | 256T |
10 | 213T | 215T | 256T | 284T |
15 | 215T | 254T | 284T | 286T |
20 | 254T | 256T | 286T | 324T |
25 | 256T | 284T | 324T | 326T |
30 | 284TS | 286T | 326T | 364T |
40 | 286TS | 324T | 364T | 365T |
50 | 324TS | 326T | 365T | 404T |
60 | 326TS | 364TS | 404T | 405T |
75 | 364TS | 365TS | 405T | 444T |
100 | 365TS | 404TS | 444T | 445T |
125 | 404TS | 405TS | 445T | - |
150 | 405TS | 444TS | - | - |
200 | 444TS | 445TS | - | - |
250 | 445TS+ | - | - | - |
Polyphase squirrel-cage motors horizontal and vertical - fan-cooled
Power (hp) | speed (rpm) | |||
---|---|---|---|---|
3600 | 1800 | 1200 | 900 | |
1/2 | - | - | - | 143T |
3/4 | - | - | 143T | 145T |
1 | - | 143T | 145T | 182T |
1 1/2 | 143T | 145T | 182T | 184T |
2 | 145T | 145T | 184T | 213T |
3 | 182T | 182T | 213T | 215T |
5 | 184T | 184T | 215T | 254T |
7 1/2 | 213T | 213T | 254T | 256T |
10 | 215T | 215T | 256T | 284T |
15 | 254T | 254T | 284T | 286T |
20 | 256T | 256T | 286T | 324T |
25 | 284TS | 284T | 324T | 326T |
30 | 286TS | 286T | 326T | 364T |
40 | 324TS | 324T | 364T | 365T |
50 | 326TS | 326T | 365T | 404T |
60 | 364TS | 364TS | 404T | 405T |
75 | 365TS | 365TS | 405T | 444T |
100 | 405TS | 405TS | 444T | 445T |
125 | 444TS | 444TS | 445T | - |
150 | 445TS | 445TS | - | - |
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