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#3735 - 08/27/01 11:48 PM Installing Panels and breakers  
Anonymous
Unregistered

I'm confused (I guess). A 200 AMP panel can handle what? Heck I'm lost now. I Thought I had it! Ok: You have 11 15 amp breaker's, can the 200 Amp panel handle this many breakers. Where does the 40 Amp, and 30 Amp breakers come in? How the heck do you wire a panel (In layman terms)? The reason I ask, is because I've had 3 different Journeyman tell me 3 different things. I'm assuming they do not know the calculations of how you know when to stop installing breakers etc.. LOST!!!!!!!!!!!!!!!!!!!!!


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#3736 - 08/28/01 06:33 AM Re: Installing Panels and breakers  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,306
Foca Se;
it is somewhat a 'code loop', but it should start with a 'demand load calculation', look in the appendix at the examples... [Linked Image]


#3737 - 08/28/01 06:49 AM Re: Installing Panels and breakers  
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
A 200 amp panel can handle 200 amps. However, this is not determined by adding up the breaker values.
Due to load diversity, it is very unlikely that each branch breaker will be loaded to its maximum value. As long as your calculated load does not exceed the panel rating, you are O.K. The same thing applies to Service Entrance conductors. A 200 amp service might, for practical resons, feed a 150 amp and 100 amp panel. As long as the calculated load does not exceed the Service Conductor rating.


#3738 - 08/30/01 10:42 PM Re: Installing Panels and breakers  
Anonymous
Unregistered

Quote
Originally posted by Redsy:
A 200 amp panel can handle 200 amps. However, this is not determined by adding up the breaker values.
Due to load diversity, it is very unlikely that each branch breaker will be loaded to its maximum value. As long as your calculated load does not exceed the panel rating, you are O.K. The same thing applies to Service Entrance conductors. A 200 amp service might, for practical resons, feed a 150 amp and 100 amp panel. As long as the calculated load does not exceed the Service Conductor rating.

Thank you for the info! This was what I figured. Thanks!


#3739 - 08/31/01 11:28 AM Re: Installing Panels and breakers  
WARREN1  Offline
Member
Joined: May 2001
Posts: 176
Greenville, SC, USA
Art. 220 of your NEC deals with the calculations. They are not that complex, however, you need to know how to do them corectly. Once you read through Art. 220, if you have questions, this BB and the great supportive people here will be glad to help.


#3740 - 08/31/01 08:28 PM Re: Installing Panels and breakers  
Anonymous
Unregistered

Quote
Originally posted by WARREN1:
Art. 220 of your NEC deals with the calculations. They are not that complex, however, you need to know how to do them corectly. Once you read through Art. 220, if you have questions, this BB and the great supportive people here will be glad to help.

Thanks!



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