I saw a panel in an old church the other day that was a Square D XO series. Has anyone ever heard of this line? It appeared to be another one of SquareD's proprietary systems, and it didnt look like anything available today would fit. Should this one be disconnected and trashed?
BTW, there was a small 2 cicuit 30 amp cicuit breaker disconnect panel for a water heater next to the XO panel made by............yup, you guessed it, FPE!!!