Main Service Panel Upgrade Question.
I have a 1950s stucco home with a 100A flush service panel with meter; the panel does not have a main breaker. I would like to upgrade to a 200A service with a main, but a new 14.4 wide panel will not fit in the bay where the original panel is located. The original panel is 12” wide and so is the bay (it is close to a corner and all other bays are 16” O.C.).
One idea is to install a surface mount panel over the smaller original flush 100A panel. But if I do this the mast head conduit would be left attached to the original panel and the service conductors feed into the new 200A panel from a knockout in the back. Would this be a NEC violation? The service conductors would be replaced and continuous from the new panel to the mast head.
Thanks in advance for any advice.