Elevator emergency power feeder balancing

A system for balancing elevator car emergency power, the system comprising:

• a first feeder group of elevator cars configured to switch from building power provided through a first building power feeder to back-up power provided through a back-up power source;
• a second feeder group of elevator cars configured to switch from the building power provided through a second building power feeder to the back-up power provided through the back-up power source;
• and
• an elevator controller that selects at least one elevator car from the first feeder group of elevator cars and selects at least one elevator car from the second feeder group of elevator cars,
• wherein the back-up power source powers the selected elevator cars from the first feeder group and the second feeder group using the back-up power.

A computer program product for balancing elevator car emergency power, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause the processor to:

• switch a first feeder group of elevator cars from building power provided through a first building power feeder to back-up power provided through a back-up power source;
• switch a second feeder group of elevator cars from the building power provided through a second building power feeder to the back-up power provided through the back-up power source;
• select, using an elevator controller, at least one elevator car from the first feeder group of elevator cars;
• select, using the elevator controller, at least one elevator car from the second feeder group of elevator cars;
• and
• power the selected elevator cars from the first feeder group and the second feeder group using the back-up power from the back-up power source.