Q&A Friday - Transformer Secondary Conductors
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- Опубликовано: 27 ноя 2024
- 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 RUclips 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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This content is ridiculously good!
Tom and Ryan have great chemistry and I could watch them sharing knowledge anytime.
love listening & learning from sir Tom & sir Ryan..salute to both of you sir!
This is awesome! Thank you so much gentlemen. Keep em coming.
This is a great topic, and the two of you both bounced off each other very well. You make a great team.
U guys rock!!
Great videos
Can we touch on the temp ratings of copper buss like a section of gear that service wires connect to. The bus feeds to the next section that has the Ultility ct and then main. Could the 90 rated wire and pressure connectors be code compliant? The service conductors would start at the utility transformer with 90 degree pressureconnectors? Thanks
"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.
Well i was confused bedore watching this and now I have more questions. I am not sure if adter two years that I'll get help but I'm hoping so. I have 4 transformers 3 feed one panel each with a main breaker on the panel. The forth one feeds two panels (both wth main breakers) directly off of the windongs.
All panels are more than 25' away. Is a fused disconnect required?
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.
@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.
Is there a definition for, nearest point of entrance??
No, it is at the discretion of the AHJ.
Please have Ryan Jackson on more often...!!!
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.
one of the most dangerous areas in the power distribution system for sure.
If the primary overcurrent device supplying a transformer is opened, the secondary conductors lose their supply.
I do not see how adding "energized" to 2023, 215.15 changes the ultimate meaning of the sentence without the term.
Did Ryan drop the “F” bomb?
Breakers on the transformer isn't a great idea.
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