CFR › Title 46 › Part 111 › §111.60-446 CFR §111.60-4Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkEach cable conductor must be 18 AWG (0.82 mm 2) or larger except—(a)Each power and lighting cable conductor must be 14 AWG (2.10 mm 2) or larger; and(b)Each thermocouple, pyrometer, or instrumentation cable conductor must be 22 AWG (0.33 mm 2) or larger.