Subpanel Help

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  #1  
Old 02-27-15, 08:45 AM
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Subpanel Help

I was hoping for some advice on a basement finish. I'm looking into subpanels and have decided to do a 100 amp off my 200 amp main.

My question is can I buy a load center subpanel with a pre-existing 100 amp breaker, remove it, put it into my main and connect to the new subpanel? Or doesn't the anatomy of the load center panel allow for this kind of alteration?

Just wondering since 100 amp breakers can cost almost as much as some panels, why not just buy the kit and alter it?

Thanks in advance for your advice...

DB
 
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  #2  
Old 02-27-15, 09:00 AM
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The mounting of many main breakers is different than a plug on breaker.
 
  #3  
Old 02-27-15, 09:44 AM
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Yes, 100 amp breakers are expensive. 60 amp is the sweet spot for a panel feed. Are you sure that you need that much?

One option is to install wires capable of supporting 100 amps and just use a 60 amp breaker until you see a bigger load.
 
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Old 02-27-15, 09:53 AM
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The 60 amp sub panel can supply 120 amps of power at 120 volts or the 60 amps at 240 volts.
 
  #5  
Old 02-27-15, 01:58 PM
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Thanks for the responses...

I plan on using the 100 amp panel for 15 amp breaker for lighting, 15 amp fridge, 15 amp up flush toilet gfi, 3 - 20 amp outlets (wet bar counter gfi, bath gfi, and walls).
The reason for the 100 amp is a possible future garage. It may be overkill but if I do a garage I will be putting in a lift.
The panels I've been looking at have the 100 amp down in the normal spaces for breakers not up on top like a main panel.
So can I get one of these 100 amp load centers with some 20 amp breakers as a package deal to save some money?

DB
 
  #6  
Old 02-27-15, 06:10 PM
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What brand is your main panel?
 
  #7  
Old 02-27-15, 08:08 PM
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My main is a Cutler-Hammer.

I'm looking at an Eaton/Cutler-Hammer BR2020B100V; 20 space, value pack comes with 5-20amp and 1-30amp (2 pole). The picture shows 100 amp in panel so can I assume it comes with it? Would I be able to do as planned with this box?
Thanks so much for any input.

DB
 

Last edited by fricker; 02-27-15 at 08:52 PM.
  #8  
Old 02-28-15, 04:41 AM
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The key here is:

My question is can I buy a load center subpanel with a pre-existing 100 amp breaker, remove it, put it into my main and connect to the new subpanel?
If your question is understood by me that you want to remove the 100amp breaker from the new panel you are purchasing to be used as the sub panel and place that breaker in the main panel to feed your new sub panel you must now determine how many circuits will be on the new sub panel. By your description it will be at least 6 or more circuits on the new sub panel. In this case you now hit the "6 throw rule". A load center which requires more than six throws of the hand to open all circuits in a load center then requires a main breaker. In this case you will have to have a main breaker in the sub panel anyway.
 
  #9  
Old 02-28-15, 06:20 AM
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There are MLO panels out there probably not at the big box stores.
Cutler-Hammer BR2040L200 Main Lug Load Center Galvanized at EssentialHardware.com
Geo
 
  #10  
Old 02-28-15, 06:26 AM
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Not sure that the 6 operations apply here as it is not a service.
Please prove me wrong.
Geo
 
  #11  
Old 02-28-15, 09:01 AM
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The six throw rule would not apply because it is not a detached structure.

You would either need a main breaker or a main lug panel. If you were to remove the main breaker from the panel you posted you would not have anyplace to attach the feeder wires. A BR 100 amp breaker is what you need in the 200 amp panel. The sub panel can be a main lug, this should save you money over buying a sub with a main breaker.

Is your main service panel also Cuttler Hammer BR?
 
  #12  
Old 02-28-15, 08:15 PM
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I'm looking at an Eaton/Cutler-Hammer BR2020B100V; 20 space, value pack comes with 5-20amp and 1-30amp (2 pole). The picture shows 100 amp in panel so can I assume it comes with it? Would I be able to do as planned with this box?
That panel has a backfed main breaker with a hold down kit. Remove the screw and the main breaker comes out and could be installed in the main panel, but that would leave no way to feed the subpanel. The backfed main not only is overcurrent protection and disconnect, but it also provides the lugs to feed the panel. You remove that main and you might as well throw that panel away.

Just buy a main lug panel and don't be so cheap about it.
 
  #13  
Old 03-01-15, 11:28 AM
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Moderator - yes, my main service is Cutler/Hammer.

CasualJoe- Thanks for the opinion...Your definition of cheap is different than mine. The anatomy of a load center was part of my question so I could understand if it made sense to do this and not throw an extra $50 on the 100amp breaker. I appreciate your explanation of the logistics of why it may not work but the 'cheap comment' was unnecessary.

DB
 
  #14  
Old 03-01-15, 11:35 AM
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Ignore Joe, he gets cranky sometimes.

Is the main panel a Cuttler Hammer BR or CH?
 
  #15  
Old 03-01-15, 05:05 PM
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I find main breaker panels to be cheaper than main lug only.
 
  #16  
Old 03-01-15, 05:58 PM
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My main is BR, Tolyn. I found a reasonable main lug and breaker. I will post what they are soon for your input.
 
  #17  
Old 03-01-15, 06:48 PM
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Found Eaton BR 1224L125V1 main lug 12 space value pack with 5 - 20 amp breakers and Eaton double pole 100 amp breaker. Both total $80. Seems like a decent deal.
 
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