⚡ QUESTION OF THE WEEK (2026)
An electrician is installing #10 AWG copper THHN conductors in a location with an ambient temperature of 42°C (108°F).
Using the 2026 NEC, determine the corrected ampacity of the conductors.
🔎 Study Challenge: Don't just calculate it — find the information you need in the NEC first. Look for:
- The base ampacity for #10 AWG copper THHN.
- The applicable ambient temperature correction factor.
- The calculation to apply the temperature correction factor.
💬 Comment your answer and identify the NEC section(s) or table(s) you used.
⚡ 2026 NEC FastTraxTube.com
⚡ Study Credit: TRADEHOG.NET
⚠️ Educational question. Verify applicable requirements using the NEC edition and local amendments.
Start with 310.16 to find table ampacity which is 40Amps
go to 310.15B(1)(1) correction .87
40 x .84 +=34.8 amps after correction