Wire Sizes Explained for Mobile, Marine & Off-Grid Electrical Systems
23 de junio de 2024 · 7 min · 154K visitas
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Nate explains the American Wire Gauge (AWG) numbering system for mobile, marine, and off-grid DC and AC electrical systems, covering the full range from 18 AWG (smallest common size) to 4/0 (four-ought, the largest practical size in these applications).0:48 The AWG scale counts down from 18 to 1, then continues as 0, 2/0, 3/0, and 4/0 — larger numbers meaning smaller wire — a counterintuitive convention rooted in the historical wire-drawing process.0:48 Sizes beyond 4/0 shift to circular mils (250 kcmil, 350 kcmil, etc.) but rarely appear in marine or off-grid work.2:36 The metric alternative — cross-sectional area in mm² — is explained as the standard outside the United States.3:17 Multi-conductor wire labeling is covered in detail: the first number is gauge, the second is the count of current-carrying conductors, giving designations like 16-2, 10-3, and 6-4.4:23 Romex 12-2 is a specific exception: it contains three physical wires because the bare ground wire is not counted as a current-carrying conductor and is labeled "12-2 with ground."4:59 Stranded triplex wire, by contrast, labels all conductors including the insulated ground.5:55 Wire sizing for specific loads is deferred to a later lesson in the academy.6:25
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