Its essentially the same as EMER ELEC but you keep all your
fuel pumps. The elec distribution is the same as it is in EMER
ELEC except that in smoke configuration the fuel pumps are
connected upstream of the GEN 1 line connector. Proc sheds
roughly 75% of electrical equipment.
All explained in DSC 24 10 30 30 p19 of the new Airbuspeak
book.