Previous in Forum: The LED Revolution   Next in Forum: Underground Cables vs Inductance
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
9 comments
Rate Comments: Nested
giri
Power-User

Join Date: May 2009
Location: Some where on Earth !!!.
Posts: 243
Good Answers: 2

Panel SFU Rating & Cable Size

11/21/2011 12:23 PM

I want to procure a panel load of 12 no. of welding receptacle feeders of 63A rating,Pls tell me what should be the incomer cable size & how its calculated.What should be the main SFU rating of the panel.Pls guide me.

__________________
 "Know something about everything and everything about something"
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
wareagle
Guru
United States - Member - New Member

Join Date: Jun 2008
Location: Alabama
Posts: 1604
Good Answers: 63
#1

Re: Panel SFU Rating & Cable Size

11/21/2011 1:31 PM

Do you the NEC as your reference.
Register to Reply
giri
Power-User

Join Date: May 2009
Location: Some where on Earth !!!.
Posts: 243
Good Answers: 2
#2
In reply to #1

Re: Panel SFU Rating & Cable Size

11/22/2011 3:02 AM

Even that would be okey to refer,though I work in India.

Thanks.

__________________
 "Know something about everything and everything about something"
Register to Reply
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#3

Re: Panel SFU Rating & Cable Size

11/22/2011 3:14 AM

British Standard 7671.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
giri
Power-User

Join Date: May 2009
Location: Some where on Earth !!!.
Posts: 243
Good Answers: 2
#4
In reply to #3

Re: Panel SFU Rating & Cable Size

11/22/2011 4:58 AM

I would be happy if you can give a rough estimate of the same.

Thanks.

__________________
 "Know something about everything and everything about something"
Register to Reply
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#9
In reply to #4

Re: Panel SFU Rating & Cable Size

07/05/2024 9:29 AM

Declined. Prices can be ascertained by contacting the British Standards Institution website. All that is needed to obtain a copy is a valid credit/debit card.

The other option is to delegate the task to a qualified local Electrician.

<unsubscribes>

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
electricalexpert65
Guru

Join Date: Oct 2009
Posts: 2061
Good Answers: 169
#5

Re: Panel SFU Rating & Cable Size

11/22/2011 5:52 AM

What is the diversity factor and what is the simultaniety factor?
Register to Reply
giri
Power-User

Join Date: May 2009
Location: Some where on Earth !!!.
Posts: 243
Good Answers: 2
#7
In reply to #5

Re: Panel SFU Rating & Cable Size

11/23/2011 2:22 AM

What I can say is that,maximum 3-4 feeders will be ON at a single time.

I cant find any desinger over her.

Pls help for atleast approaximate estimation of the same if you have any idea.

__________________
 "Know something about everything and everything about something"
Register to Reply
wareagle
Guru
United States - Member - New Member

Join Date: Jun 2008
Location: Alabama
Posts: 1604
Good Answers: 63
#6

Re: Panel SFU Rating & Cable Size

11/22/2011 11:33 AM

The NEC section that covers welders is 630. Google NEC 630 welders.
The information below should cover it for you.

http://www.youtube.com/watch?v=_R7yGDwb_z8

http://wordpress.novanumeric.com/?p=58

http://books.google.com/books?id=8cT8D9_WP7MC&pg=PA177&lpg=PA177&dq=nec+630+welders&source=bl&ots=2c9rpRgQkz&sig=bZ__NUxgOxgureHID7Wj_lsgZTU&hl=en&ei=183LTrGqBMTbtwfGraxh&sa=X&oi=book_result&ct=result&resnum=1&ved=0CDIQ6AEwAA#v=onepage&q=nec%20630%20welders&f=false

http://books.google.com/books?id=u9sN06pNaHoC&pg=SA4-PA80&lpg=SA4-PA80&dq=nec+630+welders&source=bl&ots=OQ22rlbU0a&sig=ObPe1mebdL7hTtAzDUaFXZBxmnY&hl=en&ei=zczLTsXKE5OutweTi-mFAQ&sa=X&oi=book_result&ct=result&resnum=3&ved=0CCgQ6AEwAg#v=onepage&q=nec%20630%20welders&f=false
Register to Reply
wareagle
Guru
United States - Member - New Member

Join Date: Jun 2008
Location: Alabama
Posts: 1604
Good Answers: 63
#8

Re: Panel SFU Rating & Cable Size

11/23/2011 12:34 PM

The information I gave you give a diversity factor for you project.
Register to Reply
Register to Reply
Have a Different Question?
9 comments
Copy to Clipboard

Users who posted comments:

electricalexpert65 (1); giri (3); PWSlack (2); wareagle (3)

Previous in Forum: The LED Revolution   Next in Forum: Underground Cables vs Inductance

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (90 right now)
Show Members
Advertisement