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varmit varmit is offline

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  1. Ryan@1stDay
    08-17-2016 12:22 AM - permalink
    [email protected]
    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 06:43 AM
  • Join Date: 04-19-2009
  • Referrals: 0

Mentions

08-22-2019
12:18 PM - Navyguy mentioned varmit in post Planning a Electrical Run
...would be similar to varmit explanation. I woul...
05-28-2017
12:00 PM - MerakVerer mentioned varmit in post Best multimeter?
varmit Thank you I have loo...

Quotes

09-17-2019
07:27 PM - JRaef quoted varmit in post 25 hp Wye Delta motor problem
Everything has "always work...
09-14-2019
03:33 PM - Switched quoted varmit in post Torque wrench
I have two of the "click" t...
09-01-2019
04:49 PM - varmit quoted acro in post Grounded B phase - where to bond?
Keep in mind that in most...
09:52 AM - varmit quoted acro in post Grounded B phase - where to bond?
But. Wthout a ground on t...
09:37 AM - acro quoted varmit in post Grounded B phase - where to bond?
If the generator is a wye u...
08-21-2019
10:56 PM - paulengr quoted varmit in post Planning a Electrical Run
Depending on your plant rul...
08-20-2019
06:34 AM - Paul SA quoted varmit in post Planning a Electrical Run
...kill. i agree with Varmit don't over think it ...
06-18-2019
09:15 PM - DashDingo quoted varmit in post shirts
!00 percent cotton T shirts...
06-11-2019
09:44 AM - Jarp Habib quoted varmit in post I line breakers ABC CBA left side right side rotation
You never know how some els...
06-08-2019
05:13 PM - gpop quoted varmit in post Oversized breaker in drive panel
430.122 is what would apply...
01:36 PM - frenchelectrican quoted varmit in post Check Out This Panel
The problem was the high pe...
01:12 AM - gpop quoted varmit in post How organized is your work vehicle?
I usually only do industria...
06-07-2019
09:26 AM - 99cents quoted varmit in post Back pan or no back pan?
Always use an enclosure wit...
06-03-2019
06:51 AM - Southeast Power quoted varmit in post I line breakers ABC CBA left side right side rotation
I suspect that someone, whe...
05-30-2019
09:49 AM - CoolWill quoted varmit in post 480v Ungrounded Delta
Ungrounded Delta services w...
05-28-2019
09:30 PM - varmit quoted Cow in post Strange Service
The old building per you...
05-16-2019
05:34 AM - splatz quoted varmit in post Advantage between 10 inch, 9.5 inch and 9 inch linesman pliers
Channellock, the company, m...
12:23 AM - micromind quoted varmit in post Which CB do I need for these VFDs?
If this is not a wye power ...
05-12-2019
07:19 PM - drsparky quoted varmit in post Is anyone running a NV200 for a service truck?
That is odd. The City Expre...
06:39 PM - varmit quoted drsparky in post Is anyone running a NV200 for a service truck?
Get the Chevy City Express in...

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