I installed a generator interlock kit on a 100AMP HO panel box. all circuits run fine using utility power. when I switch to Generator power all circuits work fine except for the sump pump. I ran 12/2 from the other end of the house where the sump pump is, to the main panel to a 20amp breaker. it works fine on utility power but not generator power. Could I be suffering from line loss and if so how do i fix it?