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View Full Version : What is the maximum size of a subpanel from a 100 amp main service panel

john1945
Nov 19, 2010, 06:11 AM
stanfortyman
Nov 19, 2010, 06:14 AM
Usually 100A.
john1945
Nov 19, 2010, 06:31 AM
Thank you !
donf
Nov 19, 2010, 08:02 AM
The manufacture of the panel issues a specification list for the panelboard.

On that list is the maximum size breaker for that subpanel.

The size of the breaker can vary by manufacturer.