Technical FAQs

Ask a Question

Video: What is the 3 phase breaker phasing in a factory assembled I line panel?

Issue:
What is the 3 phase breaker phasing in a factory assembled I line panel?

Product Line:
Panelboards

Environment:
I-line panels and breakers

Cause:
breaker phasing from the factory

Resolution:
Factory assembled I-Line panels have ABC phased breakers on the left and CBA phased breakers on the right. The reason for this is the NEC code requires breaker
connections to be ABC from top to bottm and from left to right. When the ABC breaker is turned to be mounted on the right side of the panel, the connection is still ABC
top to bottom but it the connections will now be right to left which is in violation of the NEC Code. However, for RTI I-line panels, it is up to the installer to make sure
they know which breakers will be mounted on the right so they can order them with the CBA configuration. 

Please see the video below that shows a detatiled explanation:

Was this helpful?
What can we do to improve the information ?