Guidelines for a Safety-Oriented Application
VFD Cable Selection Guide
| VFD Motor Properties Selection Chart for VFD Cables per NEC Small motor properties AWG size selection chart for VFD cables: VFD XLPE TR, VFD Combo XLPE, VFD Symmetrical XLPE, and VFD XLPE Auto |
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| Drive HP | 230 V 3Ø AWG |
460 V 3Ø AWG |
575 V 3Ø AWG |
| 1/4 - 3 | 14 | 16 | 18 |
| 5 | 14 | 14 | 16 |
| 7 1/2 | 12 | 14 | 14 |
| 10 | 10 | 14 | 14 |
| 15 | 8 | 12 | 14 |
| 20 | 6 | 10 | 12 |
| 25 | 4 | 8 | 10 |
| 30 | 3 | 8 | 10 |
| 40 | 2 | 6 | 8 |
| 50 | 1/0 | 4 | 6 |
| 60 | 2/0 | 3 | 4 |
| 75 | 3/0 | 2 | 3 |
| 100 | 300 MCM | 1/0 | 2 |
| 125 | 500 MCM | 2/0 | 1/0 |
| 150 | -- | 3/0 | 2/0 |
| 200 | -- | 300 MCM | 4/0 |
| 250 | -- | 400 MCM | 300 MCM |
| 300 | -- | -- | 400 MCM |
| 350 | -- | -- | 500 MCM |
| 400 - 500 | -- | -- | -- |
| Note: The above table references the suggested wire AWG to use based on Horse Power (HP) and the Full Load Current (FLC) times 125% per NEC Art. 430-22 (G) (1) and (2) for small motors. For special motor types NEC Art. 430-22 (A) - (G) may give additional restrictions for conductor sizes. |
| Amperes (FLC) were determined from NEC Art. 430-250. |
| VFD Cable Selection Guide - 1pr | |||
| Drive HP | 230 V 1pr AWG |
460 V 1pr AWG |
575 V 1pr AWG |
| 1/4 - 3 | 14 | 16* | 16* |
| 5 | 14 | 14 | 14 |
| 7 1/2 | 10 | 14 | 14 |
| 10 | 8 | 14 | 14 |
| 15 | 6 | 10 | 12 |
| 20 | -- | 8 | 10 |
| 25 | -- | 8 | 8 |
| 30 | -- | 6 | 8 |
| 40 | -- | -- | 6 |
| 50 | -- | -- | -- |
| * If the circuit is protected according NEC 43022 (G) (1) (1) or (G) (1) (2). |
| * Otherwise AWG 14. |
| VFD Cable Selection Guide - 2pr | |||
| Drive HP | 230 V 2pr AWG |
460 V 2pr AWG |
575 V 2pr AWG |
| 1/4 - 3 | 14 | 14 | 16* |
| 5 | 12 | 14 | 14 |
| 7 1/2 | 10 | 14 | 14 |
| 10 | 8 | 12 | 14 |
| 15 | 4 | 10 | 10 |
| 20 | -- | 8 | 10 |
| 25 | -- | 6 | 8 |
| 30 | -- | 6 | 6 |
| 40 | -- | -- | 6 |
| 50 | -- | -- | -- |