Transformer Secondary Conductors - NEC 240.4(F) & 240.21(C)(1)
Sizing Transformer Secondary Conductors when they are considered protected by the Primary OCPD per NEC 240.4(F) and 240.21(C)(1). [Code references are from the 2020 NEC, but most will correspond with prior editions.]
Пікірлер: 11
please continue making videos, your explanations of electrical theory and difficult articles of the code to interpret are easily understood in your quick and concise videos
Amazing video. Keep up the good work
this video helped me a ton, thank you
oh man you are awesome, i really get it
Think you just answered my question about secondary OCPD for single phase 208 to 230 buck boost transformer. Dont need it. thanks Dave!
great video
If you had the #1/0 conductor on the secondary windings and the circuit got overloaded to 140 amps, what would keep the transformer from burning out?
How do you size the circuit breaker when the transformer secondary voltage is 220v/30A and the primary is 24v/200A. Thanks
310.15(B)(16) for your ampacity table. Great guide, by the way. You call it 310.16 a few times but no worries :)
@davegordon6819
3 жыл бұрын
Thanks for the complement, and as "Ideal Alaska" mentioned, T-310.15(B)(16) in the 2017 NEC has been relabeled as T-310.16 again in the 2020 NEC. I have, however, clarified this by adding a note in the video description as only a www.nfpa.org/NEC/NEC-adoption-and-use/NEC-adoption-maps for list of states.) Thanks again.
@paulmendez7679
Жыл бұрын
Just a friendly reminder that it depends on what code book year is being used.