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366.22 (A) Sheetmetal (B) Nonmetallic
20 % maximum Cross Sectional Area Fill
Ampacity Correction Factors
Sheetmetal Gutters - no derating for up to 30 current
carrying conductors
Nonmetallic Gutters - Derate if more than 3 current
carrying conductors |
314.16
No. 18 - 1.5 cu in
No. 16 - 1.75 cu in
No. 14 - 2 cu in
No. 12 - 2.25 cu in
No. 10 - 2.5 cu in
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300.17
40 % fill
60 % Fill for Nipples
Ampacity Correction Factors
Derate for over three current carrying conductors
No derating for nipples (24 inches or less in
length)
No derating for Class 2 circuits
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