Panel Sizing Question

Maybe an electrical enclosure manufacturer (search GlobalSpec and/or the Web) could provide some information, but it might require a fee.

Some, but not all, breakers are designed to allow adjacent mounting.

This is a problem with so many variables that comprehensive software might be hard to produce, or so complex to understand that GIGO errors could be likely.

Fundamentally, there must be a heat balance between the I²R losses in the panel versus enough surface area of the enclosure to transfer this heat to the environment. (This may be assisted by various cooling schemes.)

Google "eletrical panel.sizing". I'm on my phone or I'd cut n paste some for you.

Maybe something like this...?

http://www.schneider-electric.ie/documents/panelbuilders/en/shared/technical-ressources/mv_design_guide.pdf

The most efficient way to do this is by seeking and paying for the services of a design engineer experienced with the local design codes and ambient conditions. He/she will use his own software package to verify that his design is appropriate for the local conditions, not the other way around.

Nowadays there are softwares for every application in engineering,isn't there one for dimensioning of panelboards.

It saves time.

It can also damage property and kill people. Your lack of professional and personal ethics is appalling. Maybe you want a Darwin Award, but few here do.

I made no allusions to your ethnicity, location, or education; I'm totally indifferent to it.

This is an engineering forum, all anybody should care about is the accuracy, appropriateness, and safety of the information in their posts.

Those writing computer programs can easily consult those with experience in switchboard manufacture and produce a software for this application. Iam positive there will be one or more but it may be in China,Japan,Germany,Israel etc. Search engines give Siemens,GE,Eaton,Schneider,NV energy etc

Yes, but I don't want to do that, because I don't want you or anyone else setting up in competition with my panel building factory. Go swivel!

Well, congratulations. You have, once again, turned a benign discussion into a politicial rant.

I do not know that derivative of the function f(e) = engineering topic goes f'(e) = politics. Tangential to that first derivative might be f"(e) = religious belief.

Here is a standard guide of Schnieder

GA from me

pictures are half-erased,why?.

SolarEagle #3 and Legolaz #10 link to Merlin Gerin's guide and a pocket calculator might solve your 'theory' problems, but your question suggests you are looking at minimum dimensions - and if so - this is where you could depart from the practical world.

My early experience is that 'minimum' sized switch-gear and bus-bar chambers gave no room for making the 'mechanical' connections.

No room to feed cables or conduits, no room on the bars to drill holes for all the cable lugs, no room to get hands in for nuts and bolts and spanners.... 'keyhole' engineering in this respect was a damned menace.....I guess your quest will make it worse today.

Depending on ratings/size of components space could be allowed for them.

Read the applicable codes and standards, the information is in there and it varies from country to country. Haven't we said this before?

Software is available but only properly qualified people should be designing and signing off on switchboards. Use of the wrong software to different (or obsolete) standards or reliance on software rather than proper knowledge, training and design experience is extremely dangerous.

Publish the names of softwares for switchboards

What, no please?

Have you tried an internet search yourself first? I have no idea of your actual requirements, skill set, budget, preferred switchboard equipment supplier, standards and codes you need to comply with, etc so I will refrain from offering any names that will likely as not be of little help for you (some of which have already been mentioned above).

If this is all to complicated just read the applicable standards and codes, the information is in there as well as online in guide form.

If you get desperate, call a local switchboard manufacturer and ask them what they use.

I found a site sponsored by your favorite organization.

(spoiler: Look before you leap into a rant)

Methods Of Effective Internet Research - UN.edu

Thank you,i will try.

Go to the below mentioned link. Hope it would answer your question.

https://electricalnotes.wordpress.com/2012/08/26/safety-clearance-for-electrical-panel/

If two MCCBs touch each other what is the derating factor to be applied.

It is recommended to use interphase barriers or terminal shield to ensure insulation of live parts, unless insulated bars are used to connect devices and busbar.
Have a look at the link below,
http://www2.schneider-electric.com/resources/sites/SCHNEIDER_ELECTRIC/content/live/FAQS/162000/FA162261/en_US/Safety%20Clearances.pdf

#28 is my answer for question in #27 and I dint expect an Off topic score for that.

Don't worry. I make a point of reading 'Off-Topic' replies. Quite often they are very much to the point and sometimes worth a GA. But CR4 does not allow you to add a GA to an OT.

You can, every GA is worth +1 point, every OT is worth -1 point.

Score:

• +2 or higher = Good Answer
• +1 = Almost Good Answer
• -1 to 0 = Jury is still out
• -2 or lower = Off Topic

If the score is non-zero, the voiting box will ask if you agree with the current 'direction of travel,' with a 'yes' moving the score further from zero, and a 'no' moving the score closer to zero.

Thanks for the tip. The GA option box was not there when I first looked at #28 - when it had 2 OT's. Now it is there - and only 1 OT.

Once you determine the required voltage and KW for the service application, you need only to visit any major manufacturer's website to view and download their appropriate switchboard physical size and specifications.

Most of the major companies such as Siemens, General Electric, Square D, Schneider, ETC. offer free design software from their website(s).

If you are working with or designing an IT distribution room I would seriously consider componentized modular rack mounted systems as it can make the installation much more organized, easier to service, and easier to troubleshoot.

Choose your preferred supplier and contact their technical sales support to find out what they have available then if they do not supply what you need I would contact other suppliers.

Please provide the link for one of these websites giving "panel sizing"