Search FAQs

How is I-Line phasing designated in circuit breaker catalog numbers?

Issue:
Determine the phase connection of I-Line breakers in the I-Line Panelboard

Product Line:
Panelboards and Molded Case Circuit Breakers

Resolution:
Below is a table that shows the catalog number suffixes for I-line breakers.
Table 9.121 represents the number system for Powerpact breakers.
Table 9.122 represents the number system for the older Legacy breakers.
The absence of a phase option suffix after a 3 pole catalog number will result in an ABC phase connection.