Therealcrt
Senior Member
- Location
- Kansas City
- Occupation
- Electrician
If I have 10 number 12 THHN conductors in a three-quarter inch conduit EMT D-Ray the conductors to 50% of their ampacity. I can use 310.16 tables under the 90° C for my adjustment factor which is number 12 rated for 30a but 50% now they’re only ready for 15 A. Could I still put them on a 20 amp breaker or do I need to remove a conductor from the conduit to only adjust to 70% making the conductor rated for 21 A