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varmit varmit is offline

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  1. Ryan@1stDay
    08-17-2016 12:22 AM - permalink
    Ryan@1stDay
    Hi

    I am currently trying to size my circuit conductors and breaker for a paint booth.
    The electrical in the booth consists of:
    - 20 LED lights @ .45amps each..... 9amps
    - 1 10hp 208volt motor....... NEC FLC 30.8amps
    - 1 7.5hp 208volt motor...... NEC FLC 24.2amps

    Now, what I have found is based on article 430.24 I will size my conductors based 125percent of the largest motor(38.5amps), plus the sum of the s2nd motor(24.2amps), plus the 9amps for th lighting load..

    This would bring me to, 71.7amps(#4THHN)

    Now, would I then take that total(71.7amps) and apply T430.52 to size my Breaker?? In which case, 71.7amps @ 175percent would be a 125amp breaker.?

    I feel like I am missing/overlooking something here..

    Thank you in advance for all your help!

About Me

  • About varmit
    Professional Biography
    I have done electrical work for 48 years, mostly industrial and commercial with some residential in my early career. Mostly these days I do controls, instrumentation and VFD work.
    What is your electrical related field/trade:
    Master Electrician/Instrument Tech
    General Location
    Northern Kentucky
    Special Skills, Interests, and Hobbies
    Ride and race bicycles
    Occupation
    Electrician, controls tech, junk equipment fixer
  • My Company
    Service Area
    Cincinnati/Northern Kentucky

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General Information
  • Last Activity: Today 05:56 AM
  • Join Date: 04-19-2009
  • Referrals: 0

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Quotes

04-28-2017
10:52 PM - MechanicalDVR quoted varmit in post Harbor Freight Milwaukee Tool Knock Offs
The plastic parts could be ...
04-26-2017
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I would bet on the electron...
04-21-2017
07:15 PM - splatz quoted varmit in post Klein 2000 not so heavy duty (?)
I really like the Santronic...
04-05-2017
05:48 AM - valewoodelectric quoted varmit in post Working Space
The oldest code book that I...
04-02-2017
11:45 PM - Semi-Ret Electrician quoted varmit in post Working Space
The oldest code book that I...
03-25-2017
10:39 PM - sbrn33 quoted varmit in post Lufkin 6' folding ruler. What gives?!
I have used stick rulers my...
10:33 PM - MechanicalDVR quoted varmit in post Lufkin 6' folding ruler. What gives?!
I have used stick rulers my...
03-15-2017
06:42 AM - MechanicalDVR quoted varmit in post Voltage Fluctuation
Check voltage phase to phas...
03-12-2017
11:05 PM - MechanicalDVR quoted varmit in post Old code books
Folks, Does anyone have a ...
10:25 PM - varmit quoted ppsh in post Zinsco Remediation
Not sure if my first post...
10:25 PM - brian john quoted varmit in post Old code books
Folks, Does anyone have a N...
03-11-2017
05:37 AM - varmit quoted stuiec in post AB powerflex 525
not sure if you're talking ...
03-10-2017
10:38 PM - telsa quoted varmit in post CNC Transformer and breaker sizing
Minimum required circuit am...
10:26 PM - stuiec quoted varmit in post AB powerflex 525
Referring back to the origi...
03-03-2017
09:51 PM - varmit quoted TRurak in post Multiple services allowed?
Now that I think about it, ...
02-26-2017
02:27 PM - John Valdes quoted varmit in post Feed pump
...with your statement Varmit. The motor cannot c...
02-24-2017
09:44 PM - varmit quoted jrfhope83 in post 5 Questions for research paper!
[QUOTE=jrfhope83;3702257]Hi everyone!...
02-19-2017
12:24 PM - Semi-Ret Electrician quoted varmit in post Grounding conductor from meter can
Grounding has more variable...
09:54 AM - rankin quoted varmit in post Bending offset
I always considered bending...
02-18-2017
02:03 PM - MechanicalDVR quoted varmit in post Tool Transport
I have a hand truck similar...

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