200 amp panelboard

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pelican

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I need to design 120/240v single phase service for part of a Children's Village in Brazil. It's for Rio street kids. That would be 5 houses now, and 2 in the future. Two of the homes would have runs of 210 feet and the others 125-150 feet. Each house will have a 100 amp panelboard. I will propose the power co. mount a 50kva transformer pole and one meter. The power co. will run the transformer's secondary to their junction box just below the transformer. I will tie into this secondary buss-junction box with my secondary cables and run down the pole, and enter the top of a 200 amp outdoor panelboard positioned adjacent to the pole. Need to build a trough at the bottom of this 200 panel to support the cables as they leave the panel to the houses. Can I use 7-black 60 amp breakers in that 200 amp panel to serve the home's 100 amp panels? Plan on exiting the bottom of the trough with conduit, but then DB the runs to each house. Would it be better to install 60 amp disconnect switches on a rack at the base of the pole instead of the 200 amp panel? If so, please be specfic, thanks. Oh, and if this is okay by NEC any suggestions re: cable size, conduits, etc. would be appreciated. Unfortunaelty I did not get to meet with the power co. on my visit there. You must submit your plans to them first. Thanks!!!

[ July 14, 2004, 10:44 AM: Message edited by: pelican ]
 
Re: 200 amp panelboard

Seems to me that it would be easier with a 200a 120/240, 1ph, 3w NEMA #R 3closed panelboard with a 200at main breaker on the pole below the transfomer with 2p 60at breakers. If 6 60a breakers of less you could eliminate the main breaker with the 6 disconnect rule per the NEC.
Thec all you would need is a NEMA 3R rated enclosure below the panel to make your transition to the underground feeds.
 
Re: 200 amp panelboard

Neither setup will meet NEC. NEC requires a minimum 100amp service to each home, not 60.

Why not have power company primary meter a padmount transformer, and run individual underground service laterals from transformer to each house.

Power suppliers usually will not run more than 4 homes (with usual 100amp loads) from a 25kv transformer. They usually allow around 5kv per house. Your 50kv transformer should be able to handle the connected load.

Rick Miell
 
Re: 200 amp panelboard

IF the issue is safty and economy then I would go with tmpldl's suggestion. I would imagine that in its use in brazil there is not a need for 100amp service per dwelling. using a 3r panel would save a lot of time and money. I would encourage you to do an actual load calc keeping in mind any plans for future loads of AC or expansion. Eric
 
Re: 200 amp panelboard

Please delete this item. I have new info and would like to post a new scenerio, thanks.
 
Re: 200 amp panelboard

Rather than delete the entire topic, I will close it. Members can continue the discussion on your new topic.
 
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