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Nominal solid-wire dimensions; not an ampacity rating.
d(mm) = 0.127 × 92^((36−AWG)/39); A = πd²/4; 0, −1, −2, −3 = 1/0, 2/0, 3/0, 4/0
Convert AWG 4/0–40, diameter and wire cross section. Compare mm², inches and circular mils without assuming a safe current rating.
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Use d(mm) = 0.127 × 92^((36−AWG)/39); A = πd²/4. Convert AWG 4/0–40, diameter and wire cross section. Compare mm², inches and circular mils without assuming a safe current rating.
Sources: nvlpubs.nist.gov [1]
d ≈ 0.81182 mm; A ≈ 0.51762 mm². This is a calculated example under the model stated above; it is not a measured component specification.
AWG, mm, in, mm², in², CMA, kcmil. Convert prefixes before substituting values; keep the input and output units attached to every number.
Sources: nvlpubs.nist.gov [1]
No. Within the usual AWG series, larger numbers mean smaller conductor diameters. 4/0 is larger than 1/0.
Sources: nvlpubs.nist.gov [1]
No. AWG specifies conductor size. Insulated outside diameter and stranded bundle diameter must come from the wire datasheet.
Sources: nvlpubs.nist.gov [1]
No. Installation, insulation temperature, bundling, ambient conditions and applicable electrical rules also matter.
Sources: nvlpubs.nist.gov [1]
Answers use the stated model and units. Examples are calculated values, not measurements or component ratings.
