Frequently Asked Questions
Molded Case Circuit Breakers
Square D Circuit Breakers
Yes. According the UL White Book (Product Category DIVQ), multipole common trip circuit breakers rated 125/250V are suitable for use for a single-phase multiwire circuit, with or without the neutral connected to the load. Courtesy of Mike Holt Enterprises 2008
Part number 1239L20 will suit any of 1239/20 series.