Can circuit breakers be reverse-fed or back-fed? A compiled list included.
Electrical Distribution Equipment
Any circuit breaker that does NOT have Line and Load (or + and - on DC breakers) identifying markings may be reverse fed. This includes all Square D industrial thermal-magnetic and electronic trip circuit breakers. See the compiled list below:
Breakers that can be back fed and exceptions (This is a work in process list, it is probably not inclusive and does not yet include legacy breakers):
HOM (Excludes those with suffix GFI, EPD, AFI, CAFI and DF.)
QO and QOB (Excludes those with suffix GFI, EPD, EPE, AFI, CAFI and DF.)
Multi 9 products (Excludes the products rated 125VDC, and 250-500Vdc. Also excludes ID Residual current switches, GFP, DPN VIGI and Vigi modules.)
E frame for NF panel (Excludes those with suffix EPD.)
Powerpact H, J and L frame (Excludes those with T or R suffix, which are breakers with replaceable trip units. Also excludes those with Fxx suffix, which are "frame only" sold without terminations or trip unit.)
Powerpact M, P and R frame
Masterpact NT and NW (Excludes Masterpact DC rated breakers)
SEF and SED Circuit Breakers, with or without ground fault
NOTE: Any Legacy or Powerpact breakers with GFM and ELM module attached cannot be reverse fed.