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(D) Contact Conductors
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Contact wires shall have an ampacity not less than that required by Table 610.14(A) for 75°C (167°F) wire, and in no case shall they be smaller than as shown in Table 610.14(D).
Table 610.14(D) Minimum Contact Conductor Size Based on Distance Between Supports
| Minimum Size of Wire (AWG) | Maximum Distance Between End Strain Insulators or Clamp-Type Intermediate Supports |
|---|---|
| 6 | 9.0 m (30 ft) or less |
| 4 | 18 m (60 ft) or less |
| 2 | Over 18 m (60 ft) |
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