Q&A Friday - Transformer Secondary Conductors

This #EatonTechTalk will take a look at transformer secondary conductors. Yup, you would think that things are clear there. But I'd love your opinion on this topic.
We'll also hit any questions that have come in on KZbin and via email regarding past LIVE sessions and more. We'll have a Friday discussion to close the week on a technical note.
References for this session:
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See you online!

[@manuellastrollo2168]

love listening & learning from sir Tom & sir Ryan..salute to both of you sir!

[@Nahum17good]

This is awesome! Thank you so much gentlemen. Keep em coming.

[@Roommate625]

This content is ridiculously good! Tom and Ryan have great chemistry and I could watch them sharing knowledge anytime.

[@intheskymusic]

U guys rock!!

[@pierrebelarge892]

"Feeder tap, tap conductors, secondary conductors" need to be addressed in the NEC in order to come up with the proper term as a definition. Otherwise each will call it what they may.

[@pierrebelarge892]

This is a great topic, and the two of you both bounced off each other very well. You make a great team.

[@MrMaxyield]

Please have Ryan Jackson on more often...!!!

[@kevinthompson4690]

Basically if you cant turn it off without pulling the damn meter it needs to be guarded of live parts, and not past service equipment because surprise now we have to install am Emergency disconnect.

[@TDUNPLUGGED]

one of the most dangerous areas in the power distribution system for sure.

[@ronshapiro4580]

Do you think language establishing maximum length of generator feeders originating at the alternator terminals is needed since it is currently vague per 240.21 “shall be located at the point where the conductors receive their supply”? Some AHJs limit to nearest practical but it is tough to enforce for large generators with free standing OCPDs and tight rooms. Or maybe the new language in 705.11 takes care of it.

[@TDUNPLUGGED]

@ronshapiro4580, I think it needs to be looked at. If you think about it, those conductors are feeders and they are not protected at their source but we don't have language like that what we find for transformers. It's definitely an area to explore more. maybe a future session on this one is in store.

[@pierrebelarge892]

If the primary overcurrent device supplying a transformer is opened, the secondary conductors lose their supply.

[@educationpower1823]

Is there a definition for, nearest point of entrance??

[@jeffbower5525]

No, it is at the discretion of the AHJ.

[@Nahum17good]

Did Ryan drop the “F” bomb?

[@pierrebelarge892]

I do not see how adding "energized" to 2023, 215.15 changes the ultimate meaning of the sentence without the term.

[@pierrebelarge892]

Devils advocate reply to Ryan's comment about Overcurrent protection at 240.21, as I read it. "Overcurrent protection shall be provided" - Article 100 - Overcurrent Protection Device, Branch Circuit. A device capable of providing protection for service, feeder, and branch circuits and equipment over the full range of overcurrents ..." I would think the "full range of overcurrents" is ground-faults, short-circuits and overloads??? Very similar language to 240.4. Let me know what you think. Pierre