Table
Single-Phase Transformer Full-Load Amps
Single-Phase Transformer Full-Load Amps reference with assumptions and boundary notes.
Reference boundary
Full-load current arithmetic only. It does not set primary or secondary protection.
Reference table
Convert common single-phase transformer kVA ratings to full-load current at 120, 240, and 600 V.
| Transformer kVA | 120 V A | 240 V A | 600 V A |
|---|---|---|---|
| 1 | 8.3 | 4.2 | 1.7 |
| 3 | 25 | 12.5 | 5 |
| 5 | 41.7 | 20.8 | 8.3 |
| 10 | 83.3 | 41.7 | 16.7 |
| 15 | 125 | 62.5 | 25 |
| 25 | 208.3 | 104.2 | 41.7 |
| 37.5 | 312.5 | 156.3 | 62.5 |
| 50 | 416.7 | 208.3 | 83.3 |
| 75 | 625 | 312.5 | 125 |
| 100 | 833.3 | 416.7 | 166.7 |
Use notes
- Use this table for preliminary reference and arithmetic checks only.
- Confirm equipment ratings, product markings, installation conditions, utility requirements, and the local authority requirements before design or field use.