ohmti787
Member
- Location
- Orlando, FL
- Occupation
- Electrical Engineer
Came across this article, which i think might be an exception to the 125% rule for wire and OCPD sizing.....maybe?
To give an example: i have this 36A PV system broken down into three separate strings. each string will have it's own 20a breaker inside the AC combiner box. if i go off of the 125% (36*1.25 = 45), i can put a 50A breaker/fuse between the AC combiner and the grid and call it a day. but this section will require me to upsize the ocpd to 60a as well as the wires. i guess i'm not following the logic behind this article. can somebody shed some light?
To give an example: i have this 36A PV system broken down into three separate strings. each string will have it's own 20a breaker inside the AC combiner box. if i go off of the 125% (36*1.25 = 45), i can put a 50A breaker/fuse between the AC combiner and the grid and call it a day. but this section will require me to upsize the ocpd to 60a as well as the wires. i guess i'm not following the logic behind this article. can somebody shed some light?