NEMA Straight Blade Configurations Chart
| Voltage | 15 Ampere | 20 Ampere | 30 Ampere | 50 Ampere | 60 Ampere | ||||||
| Receptacle | Plug | Receptacle | Plug | Receptacle | Plug | Receptacle | Plug | Receptacle | Plug | ||
| 2 Pole 2 Wire | |||||||||||
| 125V | 1 |  -15R |
 -15P |
||||||||
| 250V | 2 |  -15P |
 -20R |
 -20P |
 -30R |
 -30P |
|||||
| 277V AC | 3 | Reserved For Future Configurations | |||||||||
| 600V | 4 | Reserved For Future Configurations | |||||||||
| 2 Pole 3 Wire Grounding | |||||||||||
| 125V | 5 |  -15R |
 -15P |
-20R |
-20P |
-30R |
-30P |
 -50R |
 -50P |
||
| 250V | 6 |  -15R |
 -15P |
 -20R |
 -20P |
 -30R |
 -30P |
 -50R |
 -50P |
||
| 277V AC | 7 |  -15R |
 -15P |
 -20R |
 -20P |
 -30R |
 -30P |
 -50R |
 -50P |
||
| 347V AC | 24 |  -15R |
 -15P |
 -20R |
 -20P |
-30R |
-30P |
 -50R |
 -50P |
||
| 480 V AC | 8 | Reserved For Future Configurations | |||||||||
| 600 V | 9 | Reserved For Future Configurations | |||||||||
| 3 Pole 3 Wire | |||||||||||
| 125/250V | 10 |  -20R |
 -20P |
 -30R |
 -30P |
 -50R |
 -50P |
||||
| 3Ø 250V | 11 |  -15R |
 -15P |
 -20R |
 -20P |
 -30R |
 -30P |
 -50R |
 -50P |
||
| 3Ø 480V | 12 | Reserved For Future Configurations | |||||||||
| 3Ø 600V | 13 | Reserved For Future Configurations | |||||||||
| 3 pole 4 Wire Grounding | |||||||||||
| 125/250V | 14 |  -15R |
 -15P |
 -20R |
 -20P |
 -30R |
 -30P |
 -50R |
 -50P |
 -60R |
 -60P |
| 3Ø 250V | 15 |  -15R |
 -15P |
 -20R |
 -20P |
 -30R |
 -30P |
 -50R |
 -50P |
 -60R |
 -60P |
| 3Ø 480V | 16 | Reserved For Future Configurations | |||||||||
| 3Ø 600V | 17 | Reserved For Future Configurations | |||||||||
| 4 Pole 4 Wire | |||||||||||
| 3ØY 120/208V |
18 |  -15R |
-15P |
-20R |
-20P |
-30R |
-30P |
-50R |
-50P |
-60R |
-60P |
| 3ØY 277/480V |
19 | Reserved For Future Configurations | |||||||||
| 3ØY 347/600V |
20 | Reserved For Future Configurations | |||||||||
| 4 Pole 5 Wire Grounding | |||||||||||
| 3ØY 120/208V |
21 | Reserved For Future Configurations | |||||||||
| 3ØY 277/480V |
22 | Reserved For Future Configurations | |||||||||
| 3ØY 347/600V |
23 | Reserved For Future Configurations | |||||||||
