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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 11:00 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

06-22-2020
08:43 PM - Quickservice quoted varmit in post Cordless Bandsaw
I beg to disagree. I have c...
05-25-2020
08:40 AM - varmit quoted paulengr in post codes regarding control panels
First statement is right ther...
05-24-2020
10:26 PM - paulengr quoted varmit in post codes regarding control panels
If I am reading between the...
05-23-2020
10:00 PM - paulengr quoted varmit in post codes regarding control panels
Maybe I am naive, but how w...
05-16-2020
07:57 PM - SeabeeElectrician quoted varmit in post Military Electrician Needing Help on Developing Install
There would be two separate...
01:25 PM - John Valdes quoted varmit in post Rockwell training worth the cost?
If you have an AB dealer ne...
09:00 AM - varmit quoted SeabeeElectrician in post Military Electrician Needing Help on Developing Install
I'm a bit confused. Are you suggesting...
05-15-2020
11:14 PM - SeabeeElectrician quoted varmit in post Military Electrician Needing Help on Developing Install
I appreciate the challenge ...
05-12-2020
08:02 PM - Bird dog quoted varmit in post A trickle in my fingers and toes
you have installed what is ...
07:47 PM - 460 Delta quoted varmit in post Dumb question, troubleshooting
Most of the stuff that I wo...
07:30 PM - varmit quoted Jbox in post Greetings, from Kentucky
Hello everyone, I'm new h...
05:47 AM - splatz quoted varmit in post 1920s overhead crane controls
https://www.hubbell.com/ecm...
05-11-2020
09:25 PM - varmit quoted 460 Delta in post Dumb question, troubleshooting
Don't assume that the one bad ...
04-23-2020
10:48 AM - splatz quoted varmit in post Megger testing
Any Romex and devices that ...
10:26 AM - varmit quoted Ryan1 in post Megger testing
We are being contracted to...
10:17 AM - varmit quoted electricbysullivan in post Megger testing
My father is an old commercial industri...
04-19-2020
01:30 PM - varmit quoted micromind in post What are the top UL listed motors?
Based on my experience, the to...
01:22 PM - varmit quoted John Valdes in post What are the top UL listed motors?
Do you use metric (IEC) motors m...
12:32 PM - John Valdes quoted varmit in post What are the top UL listed motors?
The only new motors, that I...
04-08-2020
10:27 PM - bill39 quoted varmit in post Bored, let’s go old school tools
I am old so here is my list...

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