Transformer Secondary Conductors - NEC 240.4(F) & 240.21(C)(1)

[@shawn693]

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

[@andyramone8497]

Amazing video. Keep up the good work

[@koryabel6319]

this video helped me a ton, thank you

[@michaelwas8549]

Think you just answered my question about secondary OCPD for single phase 208 to 230 buck boost transformer. Dont need it. thanks Dave!

[@eslamelfayoumy3009]

oh man you are awesome, i really get it

[@victorco.6308]

great video

[@insylem]

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?

[@jboy4real]

How do you size the circuit breaker when the transformer secondary voltage is 220v/30A and the primary is 24v/200A. Thanks

[@kain0wnz]

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]

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]

Just a friendly reminder that it depends on what code book year is being used.

[@josephmingarelli1100]

Former name in 2017 and before