CPT Voltage Groups
| Voltage Group | Primary Voltage | Secondary Voltage |
|---|---|---|
| A | 220×440, 230×460, 240×480 | 110, 115, 120 |
| B | 240x480 | 24 |
| C | 120x240 | 24 |
| E | 550/575/600 | 110, 115, 120 |
| F | 208/277 | 120 |
| G | 200x220x440, 208x230x460, 240×480 | 110x115x120 |
| I | 380x400x415 | 110×220 |
| J | 200/220/440, 208/230/460, 240/480 | 23/110, 24/115, 25/120 |
| K | 240×480 | 120×240 |
