wireday
Senior Member
- Location
- New England
- Occupation
- Master electrician
When derating conductors for conduit fill, can we change wire size back after the derated section?
Derating
- Thread starter wireday
- Start date
- Status
- Location
- New Jersey
- Occupation
- Journeyman Electrician
The ampacity adjustment is only required for the portion of the run where the number of CCC's exceeds 3 in a raceway. If it's only a small portion of the entire run that exceeds 3 CCC's then 310.15(A)(2) Exception may apply so no derating is required at all.
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