Motors: Conductor sizing and overcurrent protection

Рет қаралды 7,478

Ryan Jackson

Күн бұрын

This video shows how to size conductors and overcurrent devices for motors.

Пікірлер: 36

@karlringsdorf5858 5 ай бұрын

I heard a comment that I still use when teaching this material. FLC = Full Load CODE, use the tables to size conductors, OCPD, devices. FLA = Full Load ACTUAL use for sizing the Overloads. Great little cheat, for remembering it.

@marianoetom1531 5 ай бұрын

A very gifted instructor.

@Matthew-fk2vv 4 ай бұрын

Sure, the NEC sits there accessible in our rooms, work vehicles & classrooms etc. It's instructors like this gentleman, however, who inspire us to read and apply it to our work. Good teachers are a gift to the world, thank you for sharing, sir.

@boeing757pilot 4 ай бұрын

Agree. He's an outstanding instructor!

@stillthakoolest 5 ай бұрын

Thanks for all you do Ryan. One of the best instructors out there. Great video

@boeing757pilot 5 ай бұрын

Definitely. He's excellent!

@rafalszachnowicz2831 5 ай бұрын

I really enjoy your videos. The topic is explained in a very logical and easy to understand way. Much better than procedural instruction given at school: you do this, then take this and based on that you do that because the table allows you this if that but not this because of that. Thank you. You helped another electrician to enjoy his job.

@boeing757pilot 5 ай бұрын

Thanks! You're an excellent instructor. You clearly explain the concept, address the nuance, anticipate and answer questions, and explain the "why" and applications.. Excellent. I wish many of my flight instructors were as good.

@RyanJacksonElectrical 5 ай бұрын

Thanks for the donation! And thanks for the kind words, that's very nice of you to say.

@boeing757pilot 5 ай бұрын

@@RyanJacksonElectrical You're quite welcome, Ryan!

@jsb7546 Ай бұрын

That is exactly it, the why to me is really important. I know a lot of guys that just say hey that's code so just do it, but having that why really helps me understand the code a lot more.

@boeing757pilot Ай бұрын

@@jsb7546 Absolutely!

@jsb7546 Ай бұрын

I love the videos man. Nice to have a guy like you that helps clarify some things in the code. Im always bugging the masters and other journeyman I know about code and you are honestly a better resource them some of them.

@Roommate625 5 ай бұрын

Ryan, always a pleasure watching you and I love the refreshers. Being a little bold and hopefully not requesting too much, I'd love a refresh on multi-motor crane calculations and arc welder calculation for conductor, etc. Again, thank you for everything you do for the electrical community!!!

@EdwardPerez-s2x 5 ай бұрын

I watched the entire video it helped me better to understand article 430 about motors rules . Thank you..

@savemyneighborhood 5 ай бұрын

Thank you, Ryan. Love your explanation and concept as it is easy to understand.

@benedalati1527 4 ай бұрын

One word, Just Excellent.

@9bnmadden 5 ай бұрын

Awesome video, very informative! Thank you, Ryan.

@ed6837 3 ай бұрын

Excellent video!! Thank you.

@Farmerdave11008 5 ай бұрын

Thank you Ryan!

@jeffreyknowles6265 5 ай бұрын

I need to replace the service on my house, I am a union electrician, I normally do not do Residential work.I would like to see a video from you about what I need to know about arc fault breakers. I graduated from my locals apprenticeship program in 1996, way before arc fault circuits.

@margaretosgood9706 3 ай бұрын

I'm a little confused about when to use the 430.6 (1) Exception No 3. 42 minutes into this video, there's a motor nameplate with both HP and full load current. Why are the NEC Part XIV tables used instead of the nameplate values?

@mattv5281 5 ай бұрын

I'm glad I only have to size the circuit for my 6.5hp shop vac based on the FLC (13A). Otherwise it looks like I'd need an 80A 120V circuit for it!

@manuellastrollo2168 4 ай бұрын

is voltage drop a factor if the motor is 150ft, 30Hp 3Ph?

@JohnThomas-lq5qp 3 ай бұрын

I disagree with the too high of a value motor amps when connecting 2, 4 or 6 pole plain jane Nema frame motors that in my 50 years as a commercial electrician covered over 99% of installtions. Of the thousands of motors that I have replaced, moved, installed or PM'ed never came across a single motor that was within 10% of the NEC ampere. Just went 125% of the motor FLA & if a long run would calculate voltage drop and would increase wire size if needed. We had AHU'S that had two 60 to 125 HP motors where both supply motors ran 24/7 but seldom over 50% of full speed and on VFD'S. I could run over 1200 amps of AHU motors from a 800 amp distribution panel for 50 years snd never trip out the 800 amp breaker because of constant reduced speeds feed from VFD'S. Only time a supply motor ran close to full speed was when other motor was down for PM or rare replacement.