“quandry” instersting word, isnt it.
Here is what I have:
New construction. Square D 400 amp rate Box. The plans call for the main disconnect to be 22,000 Vac. Max (whatever that is).The listed breaker for that is a QO-OH breaker. There area two distribution panels, and one service pane. There is one 125 amp QB125 breaker and one 150 amp QB150 breaker.
On the plans it states that the interrupting short circuit amps at the meter bank = 17812 AMPS. Use 22,00 ALL Minumuim
According to the electrical inspector, these breakers will not trip if there is a power surge to the box but they will burn, leaving the house unprotected.
Any thoughts on this.