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	Subject - Service Panel/Combo and Sub panels menehune Is it permissible under the current NEC to have 200A Service Panel/Combination with 4 100A subpanels connected? To clarify: My intension is to separate panelboard for each wings of the house. Each panelboard loads will not exceeds 60A. The Service Panel manufacturer has pre-installed 200A breaker to serve as main disconnect. I am to install 4 additional 100A breaker on the load side to serve each panelboard installed. Would this be acceptable or violation. If this question is unclear please net me know for further clarification. I appreciate your comments. Thank you. Ryan_J You will violate 230.90(A) if the calculated load is 60 amps on each panel (60*4=240amps). menehune Thanks Ryan J. for the educational input. I stated my question wrong. From the Service Panel, there are 2 doulbe pole 200A breakers to serve as a main disconnect. This panel has provision for 40 single pole breaker. Now, I wanted to connect 4 100A breaker and feeder out from it to supply 4 100A subpanels. My total load from the 4 panels will not exceeds 150A. Under the current NEC regulation, is it permissible to connect 4 100A panels and feeder from the 200A Service panel? How would you go about connenting 4 100A subpanels from a 200A meter box bombination? Thanks for the replies. Menehune Ryan_J As long as the service conductors (and therefore the equipment) have overload protection rated not more than 200 amps, you are fine as per teh exception I referenced above. If you turn off the two 100 breakers and that kills off the rest of the main panel, you are OK. If it takes 6 breakers to shut everything down, you will have to do the calculations to be certain that you meet the exception. Does that make any sense?