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Can primary breakers be exchanged in Mini-Power Zone Transformers for lower amperage ratings?

Mini Power Zone (MPZ) primary main breaker sizing

Product Line:
LV Transformers

Applies to Mini Power Zone (MPZ) Transformers by SquareD/Schneider Electric

Main breakers for Mini Power Zone (MPZ) Transformers are sized per NEC 450-3b


The primary mains supplied with an MPZ can be replaced by a lower ampacity breaker of the same voltage & AIC ratings and style. Care should be taken not to install a new, lower ampacity breaker which will allow nuisance tripping due to Transformer inrush.

CTA-ID : 254

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