# OOps

Originally Posted By: tallen
This post was automatically imported from our archived forum.

I have put the past behind me,

where , however, it now sits, making rude remarks.

www.whiteglovehomeinspections.net

30 Oct 2003-- 29 Nov2005

Originally Posted By: jbushart
This post was automatically imported from our archived forum.

Todd,

Why?

--
Home Inspection Services of Missouri
www.missourihomeinspection.com

"We're NACHI. Get over it."

www.monachi.org

Originally Posted By: Greg Fretwell
This post was automatically imported from our archived forum.

Just guessing, 159.8232?

My "sparky" is rusty.

Originally Posted By: tallen
This post was automatically imported from our archived forum.

Just cuz

--
I have put the past behind me,
where , however, it now sits, making rude remarks.

www.whiteglovehomeinspections.net

30 Oct 2003-- 29 Nov2005

Originally Posted By: pabernathy
This post was automatically imported from our archived forum.

well Mr Allen since your post was possibly directed in tripping me up…please explain the equation.

I teach NEC Code....not NEC Math other than load and calculations for computing as such, ampacity requirements and dwelling load calculations in order to obtain licensing in VA.

So it is fairly easy......YET.....lets post that on the Mike Holt forum and see how many electricians can give you this with out multiple choice which is used on most exams....refrence please.

I gave the formula for inductive reactance.......elighten me on the math to compute your question since it seems VERY important to you.

--
Paul W. Abernathy- NACHI Certified
Electrical Service Specialists
Electrical Contractor
President of NACHI Central Virginia Chapter
NEC Instructor
Moderator @ Doityourself.com

Originally Posted By: pabernathy
This post was automatically imported from our archived forum.

When teaching the NEC the math equations that come up are simular to as followes:

What is the current in ampere of a three-phase, 18KW, 208 volt load?

or

What is the powe loss in watts for a conductor tha carries 24 ampere and has a voltage drop of 7.2 volts?

These are questions on my masters exam......These are formulas we teach...sorry......I do not go much into millihenry induction or conversions of such.......hard enough for them to pass the test as it is now.

I do not recall a single " sparky " ( BTW- I hate that term ) that calculates these figures in the field.....we install to the ratings of the equipment and listings of the amp rating for REAL world installations.

--
Paul W. Abernathy- NACHI Certified
Electrical Service Specialists
Electrical Contractor
President of NACHI Central Virginia Chapter
NEC Instructor
Moderator @ Doityourself.com

Originally Posted By: jwortham
This post was automatically imported from our archived forum.

I’m gonna go with a voltage of 159.8232 VAC. (Same answer as Greg)

Assuming I remember my electronic formulas right, XL=2piFL

XL=6.2832 x 60 x.015 = 5.65488 Ohms.

5.65488 + 5 = 10.65488 Ohms.

E=IR

E=15 x 10.65488

E=159.8232 VAC.

If I am right, I'd be stunned. Been over 20 years since Navy Electronic school.

Originally Posted By: rbennett
This post was automatically imported from our archived forum.

Is the resistor in series or // with inductor??

rlb

Originally Posted By: pabernathy
This post was automatically imported from our archived forum.

no wait…I am the only one that is supposed to know this answer…I am a NEC Genious…Right?..Right???

Paul W. Abernathy- NACHI Certified

Electrical Service Specialists

Electrical Contractor

President of NACHI Central Virginia Chapter

NEC Instructor

Moderator @ Doityourself.com

Originally Posted By: pabernathy
This post was automatically imported from our archived forum.

Oh stop…you cant offend me…lol…Change the topic back and repost the question…dont remove it…hell I got it wrong…well I got the first part right but heck…I got it wrong…

Let me see.....I cant remember how it goes....

15 amps at 60 hertz with 5 ohms resistance and induction of 15 milihenrys...what is the voltage after deductions..something like that....post that sucker again...!..lol

Enlilghten us on how this is used in the electrical field today and why it is not covered in Mike Holts study guides and books for training to pass the NEC exam...lol

Heck I got close......I never really gave an answer...lol...but did get the formula right for the first part of it...lol

--
Paul W. Abernathy- NACHI Certified
Electrical Service Specialists
Electrical Contractor
President of NACHI Central Virginia Chapter
NEC Instructor
Moderator @ Doityourself.com

Originally Posted By: tallen
This post was automatically imported from our archived forum.

SO sad , I posted it for fun, No one was supposed to be able to figure it out.

The answer is 113.1 volts and if you spend the time to figure out ohms law it fits, I did not make it up..

As I said ....... Just checking. ![icon_biggrin.gif](upload://iKNGSw3qcRIEmXySa8gItY6Gczg.gif)

--
I have put the past behind me,
where , however, it now sits, making rude remarks.

www.whiteglovehomeinspections.net

30 Oct 2003-- 29 Nov2005

Originally Posted By: pabernathy
This post was automatically imported from our archived forum.

I would much more prefer to how you plan on using that knowledge in everyday electrical wiring…please enlighten me oh wise one.

Paul W. Abernathy- NACHI Certified

Electrical Service Specialists

Electrical Contractor

President of NACHI Central Virginia Chapter

NEC Instructor

Moderator @ Doityourself.com

Originally Posted By: jwortham
This post was automatically imported from our archived forum.

No way Todd.

They never would have accepted that in school.

Originally Posted By: rbennett
This post was automatically imported from our archived forum.

http://www.nachi.org/bbsystem/usrimages/D/DSC03709.JPG ]

Originally Posted By: pabernathy
This post was automatically imported from our archived forum.

now…answer my basic everyday in the field electrical math calculations that any electrician should know how to calculate because it is taught in every class…

Paul W. Abernathy- NACHI Certified

Electrical Service Specialists

Electrical Contractor

President of NACHI Central Virginia Chapter

NEC Instructor

Moderator @ Doityourself.com

Originally Posted By: pabernathy
This post was automatically imported from our archived forum.

ok…here is one for you…very simple…

A 5hp motor is located 90 feet from a 120/240v panelboard. What size conductor should be used if the motor nameplate indicated 52 ampere at 115volts? Terminal rated for 75 degree C.

In the field type question....give it a shot ole sparky !

--
Paul W. Abernathy- NACHI Certified
Electrical Service Specialists
Electrical Contractor
President of NACHI Central Virginia Chapter
NEC Instructor
Moderator @ Doityourself.com

Originally Posted By: tallen
This post was automatically imported from our archived forum.

whats the LRA goober.

It's listed on the plate.

--
I have put the past behind me,
where , however, it now sits, making rude remarks.

www.whiteglovehomeinspections.net

30 Oct 2003-- 29 Nov2005

Originally Posted By: pabernathy
This post was automatically imported from our archived forum.

you tell me…Mr. Goober… and dont say Locked Rotor Amps or anything gooberish…

Paul W. Abernathy- NACHI Certified

Electrical Service Specialists

Electrical Contractor

President of NACHI Central Virginia Chapter

NEC Instructor

Moderator @ Doityourself.com

Originally Posted By: tallen
This post was automatically imported from our archived forum.

On the fly , I am guessing it is 3 phase and would also install 12 awg THHN.

I have put the past behind me,

where , however, it now sits, making rude remarks.

www.whiteglovehomeinspections.net

30 Oct 2003-- 29 Nov2005

Originally Posted By: tallen
This post was automatically imported from our archived forum.

 pabernathy wrote: you tell me.....Mr. Goober...![icon_smile.gif](upload://b6iczyK1ETUUqRUc4PAkX83GF2O.gif)

Oh hh you got me .

whats the power factor?

--
I have put the past behind me,
where , however, it now sits, making rude remarks.

www.whiteglovehomeinspections.net

30 Oct 2003-- 29 Nov2005