Electrical Motor Frame Dimensions

NEMA electrical motor frame sizes

Dimensions of electrical motor frames according NEMA 1984 are indicated below:

Nema motor frame dimensions

  • 1 in (inch) = 25.4 mm
NEMA Frame Designation Frame Dimensions (inches)
D E 2F BA N-W V U
42 2 5/8 1 3/4 11/16 2 1/16 1 1/8   3/8
42C 2 5/8 1 3/4 11/16 2 1/16 1 1/8   3/8
48 3 2 1/8 2 3/4 2 1/2 1 1/2   1/2
48C 3 2 1/8 2 3/4 2 1/2 1 1/2   1/2
48H 3 2 1/8 4 3/4 2 1/2 1 1/2   1/2
56 3 1/2 2 7/16 3 2 3/4 1 7/8   5/8
56C 3 1/2 2 7/16   2 3/4 1 7/8   5/8
56H 3 1/2 2 7/16 5 2 3/4 1 7/8   5/8
56HZ 3 1/2 2 7/16 5 2 3/4 2 1/4 2 7/8
56J 3 1/2 2 7/16   2 3/4 2 7/16   5/8
66 4 1/8 2 15/16 5 3 1/8 2 1/4   3/4
               
140T 3 1/2 2 3/4 4 2 3/4 2 1/4   7/8
142AT 3 1/2 2 3/4 3 1/4 2 3/4 1 3/4 1 1/2 7/8
143AT 3 1/2 2 3/4 4 2 1/4 1 3/4 1 1/2 7/8
143JM 3 1/2 2 3/4 4 2 1/4     7/8
143JP 3 1/2 2 3/4 4 2 1/4     7/8
143T 3 1/2 2 3/4 4 2 1/4 2 1/4 2 7/8
143TC 3 1/2 2 3/4 4 2 3/4 2 1/4   7/8
143TR 3 1/2 2 3/4 4 2 1/4 2 5/8 1 3/4 7/8
144AT 3 1/2 2 3/4 4 1/2 2 3/4 1 3/4 1 1/2 7/8
145AT 3 1/2 2 3/4 5 2 3/4 1 3/4 1 1/2 7/8
145JM 3 1/2 2 3/4 5 2 1/4     7/8
145JP 3 1/2 2 3/4 5 2 1/4     7/8
145T 3 1/2 2 3/4 5 2 1/4 2 1/4 2 7/8
145TC 3 1/2 2 3/4 5 2 3/4 2 1/4   7/8
145TR 3 1/2 2 3/4 5 2 1/4 2 5/8 1 3/4 7/8
146AT 3 1/2 2 3/4 5 1/2 2 3/4 1 3/4 1 1/2 7/8
146ATC 3 1/2 2 3/4 5 1/2 2 3/4 2 1/4   7/8
147AT 3 1/2 2 3/4 6 1/4 2 3/4 1 3/4 1 1/2 7/8
148AT 3 1/2 2 3/4 7 2 3/4 1 3/4 1 1/2 7/8
149AT 3 1/2 2 3/4 8 2 3/4 1 3/4 1 1/2 7/8
1410AT 3 1/2 2 3/4 9 2 3/4 1 3/4 1 1/2 7/8
1411AT 3 1/2 2 3/4 10 2 3/4 1 3/4 1 1/2 7/8
1412AT 3 1/2 2 3/4 11 2 3/4 1 3/4 1 1/2 7/8
1412ATC 3 1/2 2 3/4 11 2 3/4 2 1/4   7/8
162AT 4 3 1/8 4 2 1/2 1 3/4 1 1/2 7/8
163AT 4 3 1/8 4 1/2 2 1/2 1 3/4 1 1/2 7/8
164AT 4 3 1/8 2 1/2 2 1/2 1 3/4 1 1/2 7/8
165AT 4 3 1/8 5 1/22 1/2 2 1/2 1 3/4 1 1/2 7/8
166AT 4 3 1/8 6 1/4 2 1/2 1 3/4 1 1/2 7/8
167AT 4 3 1/8 7 2 1/2 1 3/4 1 1/2 7/8
168AT 4 3 1/8 8 2 1/2 1 3/4 1 1/2 7/8
169AT 4 3 1/8 9 2 1/2 1 3/4 1 1/2 7/8
1610AT 4 3 1/8 10 2 1/2 1 3/4 1 1/2 7/8
182 4 1/2 3 3/4 4 1/2 2 3/4 2 1/4 2 7/8
L182ACY 4 1/2 3 3/4 4 1/2 2 3/4 2 1/4 2 7/8
182AT 4 1/2 3 3/4 4 1/2 2 3/4 2 1/4 2 1 1/8
L182AT 4 1/2 3 3/4 4 1/2 2 3/4   2 1 1/8
182JM 4 1/2 3 3/4 4 1/2 2 3/4     7/8
182JP 4 1/2 3 3/4 4 1/2 2 3/4 2 3/4   7/8
182T 4 1/2 3 3/4 4 1/2 2 3/4 2 3/4 2 1/2 1 1/8
182TC 4 1/2 3 3/4 4 1/2 2 3/4 3 3/8   1 1/8
182TR 4 1/2 3 3/4 4 1/2 2 3/4 2 1/4 2 1/4 1 1/8
183AT 4 1/2 3 3/4 5 2 3/4 2 1/4 2 1 1/8
184 4 1/2 3 3/4 5 1/2 2 3/4 2 1/4 2 7/8
184AT 4 1/2 3 3/4 5 1/2 2 3/4 2 1/4 2 1 1/8
184JM 4 1/2 3 3/4 5 1/2 2 3/4     7/8
184JP 4 1/2 3 3/4 5 1/2 2 3/4     7/8
184TC 4 1/2 3 3/4 5 1/2 2 3/4 2 3/4   1 1/8
184T 4 1/2 3 3/4 5 1/2 2 3/4 2 3/4 2 1/2 1 1/8
184TR 4 1/2 3 3/4 5 1/2 2 3/4 3 3/8 2 1/4 1 1/8
185AT 4 1/2 3 3/4 6 1/4 2 3/4 2 1/4 2 1 1/8
186ACY 4 1/2 3 3/4 7 2 3/4 2 1/4 2 7/8
186AT 4 1/2 3 3/4 7 2 3/4 2 1/4 2 1 1/8
L186AT 4 1/2 3 3/4 7 2 3/4 2 1/4 2 1 1/8
186ATC 4 1/2 3 3/4 7 2 3/4 2 1/4   1 1/8
187AT 4 1/2 3 3/4 8 2 3/4 2 1/4 2 1 1/8
188AT 4 1/2 3 3/4 9 2 3/4 2 1/4 2 1 1/8
189AT 4 1/2 3 3/4 10 2 3/4 2 1/4 2 1 1/8
189ATC 4 1/2 3 3/4 10 2 3/4 2 1/4   1 1/8
1810AT 4 1/2 3 3/4 11 2 3/4 2 1/4 2 1 1/8
               
203 5 4 5 1/2 3 1/8 2 1/4 2 3/4
204 5 4 6 1/4 3 1/8 2 1/4 2 3/4
213 5 1/4 4 1/4 5 1/2 3 1/2 3 2 3/4 1 1/8
213AT 5 1/4 4 1/4 5 1/2 3 1/2 2 3/4 2 1/2 1 3/8
213JM 5 1/4 4 1/4 5 1/2 3 1/2     7/8
213JP 5 1/4 4 1/4 5 1/2 3 1/2     1 1/4
213T 5 1/4 4 1/4 5 1/2 3 1/2 3 3/8 3 1/8 1 3/8
213TC 5 1/4 4 1/4 5 1/2 3 1/2 3 3/8   1 3/8
213TR 5 1/4 4 1/4 5 1/2 3 1/2 4 1/8 2 5/8 1 3/8
214AT 5 1/4 4 1/4 6 1/4 3 1/2 2 3/4 2 1/2 1 3/8
215 5 1/4 4 1/4 7 3 1/2 3 2 3/4 1 1/8
215AT 5 1/4 4 1/4 7 3 1/2 2 3/4 2 1/2 1 3/8
215JM 5 1/4 4 1/4 7 3 1/2     7/8
215JP 5 1/4 4 1/4 7 3 1/2     1 1/4
215T 5 1/4 4 1/4 7 3 1/2 3 3/8 3 1/8 1 3/8
215TC 5 1/4 4 1/4 7 3 1/2 3 3/8   1 3/8
215TR 5 1/4 4 1/4 7 3 1/2 4 1/8 2 5/8 1 3/8
216AT 5 1/4 4 1/4 8 3 1/2 2 3/4 2 1/2 1 3/8
217AT 5 1/4 4 1/4 9 3 1/2 2 3/4 2 1/2 1 3/8
218AT 5 1/4 4 1/4 10 3 1/2 2 3/4 2 1/2 1 3/8
219AT 5 1/4 4 1/4 11 3 1/2 2 3/4 2 1/2 1 3/8
219ATC 5 1/4 4 1/4 11 3 1/2 2 3/4   1 3/8
2110AT 5 1/4 4 1/4 12 1/2 3 1/2 2 3/4 2 1/2 1 3/8
2110ATC 5 1/4 4 1/4 12 1/2 3 1/2 2 3/4   1 3/8
224 5 1/2 4 1/2 6 3/4 3 1/2 3 2 3/4 1
225 5 1/2 4 1/2 7 1/2 3 1/2 3 2 3/4 1
253AT 6 1/4 5 7 4 1/4 3 1/4 3 1 5/8
254 6 1/4 5 8 1/4 4 1/4 3 3/8 3 1/8 1 1/8
254AT 6 1/4 5 8 1/4 4 1/4 3 1/4 3 1 5/8
254T 6 1/4 5 8 1/4 4 1/4 4 3 3/4 1 5/8
254TC 6 1/4 5 8 1/4 4 1/4 4   1 5/8
254TR 6 1/4 5 8 1/4 4 1/4 4 1/2 2 7/8 1 5/8
254U 6 1/4 5 8 1/4 4 1/4 3 3/4 3 1/2 1 5/8
255AT 6 1/4 5 9 4 1/4 3 1/4 3 1 5/8
256AT 6 1/4 5 10 4 1/4 3 1/4 3 1 5/8
256T 6 1/4 5 10 4 1/4 4 3 3/4 1 5/8
256TC 6 1/4 5 10 4 1/4 4   1 5/8
256TR 6 1/4 5 10 4 1/4 4 1/2 2 7/8 1 5/8
256U 6 1/4 5 10 4 1/4 3 3/4 3 1/2 1 3/8
257AT 6 1/4 5 11 4 1/4 3 1/4 3 1 5/8
258AT 6 1/4 5 12 1/2 4 1/4 3 1/4 3 1 5/8
259AT 6 1/4 5 14 4 1/4 3 1/4 3 1 5/8
283AT 7 5 1/2 8 4 3/4 3 1/4 3 1/2 1 7/8
284 7 5 1/2 9 1/2 4 3/4 3 3/4 3 1/2 1 1/4
284AT 7 5 1/2 9 1/2 4 3/4 3 3/4 3 1/2 1 7/8
284T 7 5 1/2 9 1/2 4 3/4 4 5/8 4 3/8 1 7/8
284TC 7 5 1/2 9 1/2 4 3/4 4 5/8   1 7/8
284TR 7 5 1/2 9 1/2 4 3/4 4 3/4 3 1/8 1 7/8
284TC 7 5 1/2 9 1/2 4 3/4 3 1/4 3 1 5/8
284U 7 5 1/2 9 1/2 4 3/4 4 7/8 4 5/8 1 5/8
285AT 7 5 1/2 10 4 3/4 3 3/4 3 1/2 1 7/8
286AT 7 5 1/2 11 4 3/4 3 3/4 3 1/2 1 7/8
286T 7 5 1/2 11 4 3/4 4 5/8 4 3/8 1 7/8
286TC 7 5 1/2 11 4 3/4 4 5/8   1 7/8
286TR 7 5 1/2 11 4 3/4 4 3/4 3 1/8 1 7/8
286TS 7 5 1/2 11 4 3/4 3 1/4 3 1 7/8
286U 7 5 1/2 11 4 3/4 4 7/8 4 5/8 1 7/8
287AT 7 5 1/2 12 1/2 4 3/4 3 3/4 3 1/2 1 7/8
288AT 7 5 1/2 14 4 3/4 3 3/4 3 1/2 1 7/8
289AT 7 5 1/2 16 4 3/4 3 3/4 3 1/2 1 7/8
               
323AT 8 6 1/4 9 4 3/4 4 1/4 4 2 1/8
324 8 6 1/4 10 1/2 5 1/4 4 7/8 4 5/8 1 5/8
324AT 8 6 1/4 10 1/2 5 1/4 4 1/4 4 2 1/8
324TR 8 6 1/4 10 1/2 5 1/4 5 1/4 3 1/2 2 1/8
324TS 8 6 1/4 10 1/2 5 1/4 3 3/4 3 1/2 1 7/8
324U 8 6 1/4 10 1/2 5 1/4 5 5/8 5 3/8 1 7/8
325AT 8 6 1/4 11 5 1/4 4 1/4 4 2 1/8
326 8 6 1/4 12 5 1/4 4 7/8 4 5/8 1 5/8
326AT 8 6 1/4 12 5 1/4 4 1/4 4 2 1/8
326T 8 6 1/4 12 5 1/4 5 1/4 5 2 1/8
326TR 8 6 1/4 12 5 1/4 5 1/4 3 1/2 2 1/8
326TS 8 6 1/4 12 5 1/4 3 3/4 3 1/2 1 7/8
326U 8 6 1/4 12 5 1/4 5 5/8 5 3/8 1 7/8
327AT 8 6 1/4 14 5 1/4 4 1/4 4 2 1/8
328AT 8 6 1/4 16 5 1/4 4 1/4 4 2 1/8
329AT 8 6 1/4 18 5 1/4 4 1/4 4 2 1/8
363AT 9 7 10 5 7/8 4 3/4 4 1/2 2 3/8
364 9 7 11 1/4 5 7/8 5 5/8 5 3/8 1 7/8
364AT 9 7 11 1/4 5 7/8 4 3/4 4 1/2 2 3/8
364S 9 7 11 1/4 5 7/8 3 1/4 3 1 5/8
364T 9 7 11 1/4 5 7/8 5 7/8 5 7/8 2 3/8
364TR 9 7 11 1/4 5 7/8 5 3/4 3 3/4 2 3/8
364TS 9 7 11 1/4 5 7/8 3 3/4 3 1/2 1 7/8
364U 9 7 11 1/4 5 7/8 6 3/8 6 1/8 2 1/8
365 9 7 12 1/4 5 7/8 5 5/8 5 3/8 1 7/8
365AT 9 7 12 1/4 5 7/8 4 3/4 4 1/2 2 3/8
365T 9 7 12 1/4 5 7/8 5 7/8 4 7/8 2 3/8
324T 8 6 1/4 10 1/2 5 1/4 5 1/4 5 2 1/8
365TR 9 7 12 1/4 5 7/8 5 3/4 3 3/4 2 3/8
365TS 9 7 12 1/4 5 7/8 3 3/4 3 1/2 1 7/8
365U 9 7 12 1/4 5 7/8 6 3/8 6 1/8 2 1/8
366AT 9 7 14 5 7/8 4 3/4 4 1/2 2 3/8
364AT 9 7 11 1/4 5 7/8 4 3/4 4 1/2 2 3/8
367AT 9 7 16 5 7/8 4 3/4 4 1/2 2 3/8
368AT 9 7 18 5 7/8 4 3/4 4 1/2 2 3/8
369AT 9 7 20 5 7/8 4 3/4 4 1/2 2 3/8

Related Topics

  • Electrical - Amps and electrical wiring, AWG - wire gauge, electrical formulas, motors and units

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