Electrical · IRC 2021 §E3705.2

Ambient Temperature Ampacity Correction

Hot attic example and excerpt of the ambient correction factors, with 60, 75 and 90 degree C columns, applied to allowable ampacity for ambient above 30 C (86 F).. Referenced to IRC 2021 §E3705.2.

The rest of Ambient Temperature Ampacity Correction is for members

You're reading the opening of Ambient Temperature Ampacity Correction. Members see the complete text, every cross-reference and the tools on this page — free for 14 days, no card required.

  • The annotated detail diagram with dimension callouts
  • The code section it illustrates, in full
  • Related diagrams in the same category
  • Download and insert into a project
Unlock Ambient Temperature Ampacity Correction — free for 14 daysSign in →

No card required. After the 14-day trial, plans start at $29/mo.

Our previews are real data — live counts, no placeholders. We publish our error log →