As a 4th year IEC apprentice, I wish all of my teachers had your skill and passion to teach. Thanks for filling in the gaps, look forward to many more videos
I've been teaching apprentices in the field correction factors on scraps of drywall during breaks for years. From now on I'm just sending them links to this channel. Thank for getting me back my lunch breaks!
Probably the best explanation on derating I have seen. Of special note was the use of the thhn or 90 degree rating. I believe this to be the most misunderstood aspect of the entire issue. Thanks.
Who is this man? He is doing a great job on his videos. I have been a licensed C-10 electrical contractor for 40 years. His material is wonderfull. This is all information that I had to learn the hard way.... by trial and error. Thank you.
Dave thanks so much for creating the videos!!! I have been a licensed electrician since early 90's and have been in many classes. Your explanations and teaching methods are excellent! Apprentices to Journeymen will greatly benefit from your videos and explanations!!! Dave please do a video on continuous loads and ampacity adjustment calculations when both are a factor in a conduit run?
Excellent video. I'm confused on one thing though. You mentioned 310.15(A) which states in 2nd paragraph: "The temperature correction and adjustment factors shall be permitted to be applied to the ampacity for the temperature rating of the conductor, if the corrected and adjusted ampacity does not exceed the ampacity for the temperature rating of the termination in accordance with the provisions of 110.14(C) ." My question is, WHICH ambient temperature correction factor would I use to correct the conductor's ampacity? The one of the lower-rated terminal or the one of the higher-rated conductor? And after I calculate this corrected ampacity, must it be less than the terminal ampacity under the conditions of use OR its ampacity after correction for ambient temperature? The code doesn't mention needing to correct termination ampacity as a requirement for this permission but it seems odd that it wouldn't be done, right?
I'm not an electrician but I do have an electrical engineering degree and am working on passing my local homeowner's electrical exam so I can pull my own permits. Your videos are super helpful! A couple suggestions I have for future content: * Service and feeder load calculations * Load calculation guidance specifically for level 2 home EVCS which isn't covered very well at least by NEC 2017 Article 220 or 625. Actually, given the massive amount of EV charging infrastructure in general it would probably be good to work on a series exploring best practices and code guidelines around that - both commercial and residential charging.
I also would love to see that as my company put in an 80A Ford lightning charger and used 100A wire and OCPD for continuous duty, and Inspector gadget is making us do a service calc for the home. I know the Chevy Bolt charger requires a NEMA 14-50 outlet which has to have GFCI protection and thats a $100 breaker, we try to hardwire most chargers and theres an exception saying GFCI breaker isnt required here in Oregon
I'm using 2014 NEC and I don't see 310.14 , what to do??? Another question why did you not incorporate 110.14 ( c) ( 1) . You consistently used the 90 degree col and I dont know why? When is it ok to use article 110.14 and when its ok to choose a starting col from 310.15 ?? Great presentation ,I'm just gonna have to go elsewhere to get my question answered!
Dave, I like the simplicity to which you pass knowledge. Thanks for your videos , i listened to them to get me up to date on NEC. Please do you have them in book or e-book form ? I am interested. Thanks
Thank you Dave! Nec is unclear on what constitutes “bundling” with regard to installing NM-B cables. Can you please provide any information that specifically speaks to this issue? Great video!!
I've been out of the electrical world for a while (EE turned CS) but I'm wiring up a shop right now and needed a refresher. I don't know that anyone could have said it any clearer, and outlined all the specific conditions so well.
wish these videos had been available when I went through my apprenticeship in the IEC twenty-three years ago. I'm now a second year electrical instructor for ABC of Iowa and use your videos regularly in my class. Your method of explaining is wonderful (especially the open neutral demonstration). Thank you for making these.
![Ampacity Table, NEC 2020 - [310.15], (13min:26sec)](/img/n.gif)
As a 4th year IEC apprentice, I wish all of my teachers had your skill and passion to teach. Thanks for filling in the gaps, look forward to many more videos
IEC was and still is a fucking scam brotha 😂
I've been teaching apprentices in the field correction factors on scraps of drywall during breaks for years. From now on I'm just sending them links to this channel. Thank for getting me back my lunch breaks!
Probably the best explanation on derating I have seen. Of special note was the use of the thhn or 90 degree rating. I believe this to be the most misunderstood aspect of the entire issue. Thanks.
So much better explained that Mike Holt's poorly edited endless rant. Thanks Dave!
Who is this man? He is doing a great job on his videos. I have been a licensed C-10 electrical contractor for 40 years. His material is wonderfull. This is all information that I had to learn the hard way.... by trial and error.
Thank you.
Thanks you Dave, excellent depicted analysis and like the visuals aid of magnets as bullet points.
Awesome video, thank you for being so thorough and understanding. I'll definitely be watching the rest of your videos.
Super helpful. You're a great teacher. Wish you the best
Dave, your videos are life savers. Thanks a lot!
Good to see you again Dave! Thanks for the video!
Thanks Luke, and thanks for following and supporting. Hope all is well.
Solid gold my man. Needed concise and you do that
He is a great on teaching, also passionate about it.
Hell yeah, great to see you back.
Dave thanks so much for creating the videos!!! I have been a licensed electrician since early 90's and have been in many classes. Your explanations and teaching methods are excellent! Apprentices to Journeymen will greatly benefit from your videos and explanations!!!
Dave please do a video on continuous loads and ampacity adjustment calculations when both are a factor in a conduit run?
Great VID, thanks for taking the time.
Excellent video. I'm confused on one thing though. You mentioned 310.15(A) which states in 2nd paragraph: "The temperature correction and adjustment factors shall be permitted to be applied to the ampacity for the temperature rating of the conductor, if the corrected and adjusted ampacity does not exceed the ampacity for the temperature rating of the termination in accordance with the provisions of 110.14(C) ."
My question is, WHICH ambient temperature correction factor would I use to correct the conductor's ampacity? The one of the lower-rated terminal or the one of the higher-rated conductor? And after I calculate this corrected ampacity, must it be less than the terminal ampacity under the conditions of use OR its ampacity after correction for ambient temperature?
The code doesn't mention needing to correct termination ampacity as a requirement for this permission but it seems odd that it wouldn't be done, right?
Hi Dave I’m your fans like your video a lot
So when we say “alowable ampacity” we’re talking about how many amps a load is allowed to pull through a wire?
Thank you for the class!
You good sir are a legend 🎉
Perfect explanation!
can you do a video about sizing feeder conductor for dweling units... thanks for your videos
Wow ur a great Instructor 👍
Running 14/2, or 12/2 NM-B: We are limited to 2 romex per stud hole, is that correct? Could both hot+neutral for each set of romex?
Thank you sir 👏🏼
thank you, sir
Adjustment factors don’t apply to conduits under 24” you just can’t exceed 60% fill
EXCELLENT VEDIO 👌👌🙏🙏
Someone give him a hand 👏
You forgot Conductor terminal at the LUG is only rated for 60° C
He said that
Thank you.
Thanks for your help
I'm not an electrician but I do have an electrical engineering degree and am working on passing my local homeowner's electrical exam so I can pull my own permits. Your videos are super helpful! A couple suggestions I have for future content:
* Service and feeder load calculations
* Load calculation guidance specifically for level 2 home EVCS which isn't covered very well at least by NEC 2017 Article 220 or 625.
Actually, given the massive amount of EV charging infrastructure in general it would probably be good to work on a series exploring best practices and code guidelines around that - both commercial and residential charging.
I also would love to see that as my company put in an 80A Ford lightning charger and used 100A wire and OCPD for continuous duty, and Inspector gadget is making us do a service calc for the home. I know the Chevy Bolt charger requires a NEMA 14-50 outlet which has to have GFCI protection and thats a $100 breaker, we try to hardwire most chargers and theres an exception saying GFCI breaker isnt required here in Oregon
I'm using 2014 NEC and I don't see 310.14 , what to do??? Another question why did you not incorporate 110.14 ( c) ( 1) . You consistently used the 90 degree col and I dont know why? When is it ok to use article 110.14 and when its ok to choose a starting col from 310.15 ?? Great presentation ,I'm just gonna have to go elsewhere to get my question answered!
Great job explaining this! You make it very understandable.
Ps: Soli Deo Gloria
Thank you so much for a very good explanation you are a good teacher indeed
where can i see in the book about the metalic and non metalic ?
Dave, I like the simplicity to which you pass knowledge. Thanks for your videos , i listened to them to get me up to date on NEC. Please do you have them in book or e-book form ? I am interested. Thanks
gifted teacher
Derate, not restrict
Terminology matters
Excellent explanation.........
Thank you Dave! Nec is unclear on what constitutes “bundling” with regard to installing NM-B cables. Can you please provide any information that specifically speaks to this issue? Great video!!
I've been out of the electrical world for a while (EE turned CS) but I'm wiring up a shop right now and needed a refresher. I don't know that anyone could have said it any clearer, and outlined all the specific conditions so well.
wish these videos had been available when I went through my apprenticeship in the IEC twenty-three years ago. I'm now a second year electrical instructor for ABC of Iowa and use your videos regularly in my class. Your method of explaining is wonderful (especially the open neutral demonstration). Thank you for making these.
nice trick with the magnets used as white board markers
By far one of the best teachers I have ever seen...better than mike holt 100%
Video was very helpful! 👍🏽
I like the clarity
This is GREAT!!!