NEMA Locking Blade Configurations Chart
| Voltage | 15 Ampere | 20 Ampere | 30 Ampere | ||||
| Receptacle | Plug | Receptacle | Plug | Receptacle | Plug | ||
| 2 Pole 2 Wire | |||||||
| 125V | L1 |  L1-15R |
 L1-15P |
||||
| 250V | L3 |  L2-20R |
 L2-20P |
||||
| 277V AC | L3 | Reserved For Future Configurations | |||||
| 600V | L4 | Reserved For Future Configurations | |||||
| 2 Pole 3 Wire Grounding | |||||||
| 125V | L5 |  L5-15R |
 L5-15P |
 L5-20R |
 L5-20P |
 L5-30R |
 L5-30P |
| 250V | L6 |  L6-15R |
 L6-15P |
 L6-20R |
 L6-20P |
 L6-30R |
 L6-30P |
| 277V AC | L7 |  L7-15R |
 L7-15P |
 L7-20R |
 L7-20P |
 L7-30R |
 L7-30P |
| 347V AC | L24 |  L24-20R |
 L24-20P |
||||
| 480 V AC | L8 |  L8-20R |
 L8-20P |
 L8-30R |
 L8-30P |
||
| 600 V | L9 |  L9-20R |
 L9-20P |
 L9-30R |
 L9-30P |
||
| 3 Pole 3 Wire | |||||||
| 125/250V | L10 |  L10-20R |
 L10-20P |
 L10-30R |
 L10-30P |
||
| 3Ø 250V | L11 |  L11-15R |
 L11-15P |
 L11-20R |
 L11-20P |
 L11-30R |
 L11-30P |
| 3Ø 480V | L12 |  L12-20R |
 L12-20P |
 L12-30R |
 L12-30P |
||
| 3Ø 600V | L13 |  L13-30R |
 L13-30P |
||||
| 3 pole 4 Wire Grounding | |||||||
| 125/250V | L14 |  L14-20R |
 L14-20P |
 L14-30R |
 L14-30P |
||
| 3Ø 250V | L15 |  L15-20R |
 L15-20P |
 L15-30R |
 L15-30P |
||
| 3Ø 480V | L16 |  L16-20R |
 L16-20P |
 L16-30R |
 L16-30P |
||
| 3Ø 600V | L17 |  L17-30R |
 L17-30P |
||||
| 4 Pole 4 Wire | |||||||
| 3ØY 120/208V |
L18 |  L18-20R |
 L18-20P |
 L18-30R |
 L18-30P |
||
| 3ØY 277/480V |
L19 |  L19-20R |
 L19-20P |
 L19-30R |
 L19-30P |
||
| 3ØY 347/600V |
L20 |  L20-20R |
 L20-20P |
 L20-30R |
 L20-30P |
||
| 4 Pole 5 Wire Grounding | |||||||
| 3ØY 120/208V |
L21 |  L21-20R |
 L21-20P |
 L21-30R |
 L21-30P |
||
| 3ØY 277/480V |
L22 |  L22-20R |
 L22-20P |
 L22-30R |
 L22-30P |
||
| 3ØY 347/600V |
L23 |  L23-20R |
 L23-20P |
 L23-30R |
 L23-30P |
||
