Observed a 240v receptacle (ev charger) wired with 8awg AL, supplied by a 50 amp gfci breaker.
Generally speaking, the ocpd should be 30 amps for the 8awg AL conductors. Are there any exclusions/exceptions beyond my general knowledge that would make a 50 amp ocpd appropriate for a 240v receptacle?
Thank you, Robert!
I know there are different temperature ratings for conductors, receptacle terminals, etc. that allow different ocpd ratings, however, most of those are still out of my comprehension & memory.
Yeah, that was 6awg copper used for the neutral on the gfci breaker. Maybe they used some surplus when they trimmed the cable at the top 60 amp breaker.
This home also had a couple 14awg conductors to 20 amp ocpds in the sub. I figured the bozo finished out with what he had on the truck but just wanted to check the 240v receptacle since I knew there were some ampacity differences that I am not totally familiar with.
Thanks to the both of you! Y’all are always a wealth of knowledge & accuracy!
I know that it can be very confusing as there are several variables that can affect the ampacity of the branch circuit. You have the conductor ampacity itself based on the material and size, the terminal temperature limit at each end, and the wiring method (SE cable, NM cable, MC cable, etc.).