4300 Series Ancillary Cabinets Installation and Operation Manual
27
Table 10.3 - 431A Input/Output Power Cable Sizes
(Cable sizes for 75°C Copper Cable)
Recommended/Maximum Wire size and Torque Requirement
Trans- | Code | Input/Output Trans- | Xfmr Type |
| 30 kVA |
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| 50 kVA | Tightening | ||
former |
| former Voltage |
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| Torque | |||
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| Phase AWG* | Neutral AWG* | Phase AWG* | Neutral AWG* | ||||||
Input | B | 208V Δ to 208/120V Y | Input Iso | 2 | - 250 kcmil |
| N/A | 2/0 - 250 kcmil | N/A | 200 | |
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| C | 240V Δ to 208/120V Y | Input Iso | 3 | - 250 kcmil |
| N/A | 1/0 - 250 kcmil | N/A | 200 | |
| N | 380V Δ to 208/120V Y | Input Iso | 6 | - 250 kcmil |
| N/A | 3 | - 250 kcmil | N/A | 200 |
| N | 400/415V Δ to 208/120V Y | Input Iso | 6 | - 250 kcmil |
| N/A | 3 | - 250 kcmil | N/A | 200 |
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| S | 480V Δ to 208/120V Y | Input Iso | 6 | - 250 kcmil |
| N/A | 4 | - 250 kcmil | N/A | 200 |
| M | 600V Δ to 208/120V Y | Input Iso | 6 | - 250 kcmil |
| N/A | 6 | - 250 kcmil | N/A | 200 |
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| X | 208/120V Y 4 wire input | N/A | 1/0 - 250 kcmil | 4/0 - 350 kcmil |
| 250 kcmil | 350 kcmil | 200 | ||
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| (No Transformer) |
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| K | 480/277V Y to 208/120V Y | Input Auto | 6 | - 250 kcmil | 3 | - 350 kcmil | 3 | - 250 kcmil | 2/0 - 350 kcmil | 200 |
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Output | F | 208/120V Y 4 wire input | N/A | 1/0 - 250 kcmil | 4/0 - 350 kcmil |
| 250 kcmil | 350 kcmil | 200 | ||
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| (No Transformer) |
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| H | 208/120V Y to 220/127V Y | Output Auto | 1 - 250 kcmil | 4/0 - 350 kcmil | 4/0 - 250 kcmil | 350 kcmil | 200 | |||
| J | 208/120V Y to 240/139V Y | Output Auto | 2 - 250 kcmil | 3/0 - 350 kcmil | 3/0 - 250 kcmil | 350 kcmil | 200 | |||
| P | 208/120V Y to 380/220V Y | Output Iso | 4 - 250 kcmil | 1 - 350 kcmil | 1 - 250 kcmil | 4/0 - 350 kcmil | 200 | |||
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| Q | 208/120V Y to 400/230V Y | Output Iso | 4 - 250 kcmil | 1 - 350 kcmil | 2 - 250 kcmil | 3/0 - 250 kcmil | 200 | |||
| K | 208/120V Y to 480/277V Y | Output Auto | 6 - 250 kcmil | 3 - 350 kcmil | 3 - 250 kcmil | 2/0 - 250 kcmil | 200 | |||
| M | 208/120V Y to 600/347V Y | Output Iso | 6 - 250 kcmil | 4 - 350 kcmil | 4 - 250 kcmil | 1/0 - 250 kcmil | 200 | |||
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* Wire capacity for Phase lugs is 250 kcmil - 6 AWG, Neutral lugs is 350 kcmil - 6 AWG.
