ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
A 5-20(20a) receptacle is legal on a 15a circuit?
by libellis - 10/10/21 12:46 PM
GFCI's pops in large numbers
by dsk - 10/07/21 03:46 PM
Backup Generator Done Right
by timmp - 10/06/21 02:07 PM
How's all our Non-US folks doing?
by dsk - 09/30/21 05:06 AM
Well I am back to stay (nearly 6 years)
by Bill Addiss - 09/26/21 11:09 PM
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 (), 5 guests, and 23 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

Building Codes & Related References
#154364 06/09/05 01:45 AM
Joined: Jul 2004
Posts: 9,667
Likes: 5
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
 

* * * * * * *

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

 

Member Spotlight
MarkC10
MarkC10
CA, Inland Empire
Posts: 43
Joined: September 2013
Top Posters(30 Days)
dsk 5
Popular Topics(Views)
284,541 Are you busy
217,274 Re: Forum
203,620 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5