ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Strobing LEDs
by HotLine1 - 10/07/22 03:05 PM
How's Florida doing with Hurricane Ian?
by Bill Addiss - 09/28/22 12:41 PM
Tough being a lineman's kid
by Bill Addiss - 09/28/22 12:39 PM
GFCI's pops in large numbers
by dsk - 09/26/22 04:35 AM
AFCI’s Revisited
by sparky - 09/24/22 09:58 AM
New in the Gallery:
240/208 to a house
240/208 to a house
by wa2ise, October 9
Now you know.
Now you know.
by Tom_Horne, September 7
Who's Online Now
0 members (), 28 guests, and 12 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#154363 06/08/05 11:59 PM
Joined: Mar 2004
Posts: 98
O
Member
Hi all.
Question for load calculation.
Ive got 2- 50 amp 480 volt 1 ph 70% duty welders.
Using the multiplier .84 for the 70 % duty cycle, I am to use this on the first 2 welders correct?
Also,if using a 3rd welder,using the 85 %,is this 85% of the .84 multiplier.
Your opinions appreciated

Stay up to Code with the Latest NEC:


2020 NEC & Related Reference & Study Guides
2020 NEC & Related Reference & Study Guides
Pass Your Exam the FIRST TIME with these Exam Prep Combos:
 

>> Master Electrician Exam Prep     >> JourneyMan Electrician Exam Prep
 

#154364 06/09/05 01:45 AM
Joined: Jul 2004
Posts: 9,745
Likes: 13
G
Member
That's the way 630.11(B) reads to me

(B) Group of Welders. Conductor ampacity shall be based on the individual currents determined in 630.11(A) as the sum of 100 percent of the two largest welders, plus 85 percent of the third largest welder...


Greg Fretwell
#154365 06/09/05 09:00 AM
Joined: Aug 2003
Posts: 1,374
R
Moderator
I have moved this to the NEC forum. Please post your comments here:

https://www.electrical-contractor.net/ubb/Forum2/HTML/002126.html


Ryan Jackson,
Salt Lake City

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *
2023 National Electrical Code (NEC)
2023 NEC Now Available!
 
* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Potseal
Potseal
Saskatchewan
Posts: 264
Joined: February 2013
Top Posters(30 Days)
dsk 3
Popular Topics(Views)
297,835 Are you busy
228,539 Re: Forum
213,373 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5