Can an F-Line contactor be backfed?
Digest 177 Section 18 : Contactors and Starters IEC
North American Products
Yes. Electrically, the F Line contactor can be backfed. However, a UL inspector may have an objection, because of the L1 L2 and L3 line side marking and the T1 T2 and T3 markings on the load side.