What is the replacement part number for a 1 pole miniature QB branch breaker for an NQB Panelboard?
Issue:
What replaces 1P QB Branch breaker in an old NQB panelboard?
Product Line:
Legacy Circuit Breakers
Environment:
Applies tominiature 1 pole QB frame breaker 15-50 A 120/240 V
Resolution:
There were two versions of the NQB panel:
The NQB panel built from 1947 to 1950 used the ML Series branch breakers.
The NQB panel built from 1950 to 1958 used QB type 3 3/4 in long branch breakers.
Both panels and branch breakers are obsolete, no longer available with no viable replacement. Will have to look at replacing the panelboard.
What replaces 1P QB Branch breaker in an old NQB panelboard?
Product Line:
Legacy Circuit Breakers
Environment:
Applies tominiature 1 pole QB frame breaker 15-50 A 120/240 V
Resolution:
There were two versions of the NQB panel:
The NQB panel built from 1947 to 1950 used the ML Series branch breakers.
The NQB panel built from 1950 to 1958 used QB type 3 3/4 in long branch breakers.
Both panels and branch breakers are obsolete, no longer available with no viable replacement. Will have to look at replacing the panelboard.
Released for: Schneider Electric USA
