View all text of Subpart B [§ 18.20 - § 18.54]
§ 18.24 -
Minimum clearances between uninsulated electrical conductor surfaces, or between uninsulated conductor surfaces and grounded metal surfaces, within the enclosure shall be as follows:
Minimum Clearances Between Uninsulated Surfaces
| Phase-to-Phase Voltage (rms) | Clearances (inches) | Phase-to-Phase | Phase-to-Ground or Control Circuit | 0 to 250 | 0.25 | 0.25 | 251 to 600 | 0.28 | 0.25 | 601 to 1000 | 0.61 | 0.25 | 1001 to 2400 | 1.4 | 0.6 | 2401 to 4160 | 3.0 | 1.4 |
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