Im wiring an elevator in a residence, Threes phase 120/208. A 60 amp breaker feeds a heavy duty siemens disconnect on the fourth floor. the load side of that disconnect goes to another heavy duty disconnect in the top of the shaft. I need to install contacts so that a battery backup system will be able to raise or lower the car incase of loss of power. im a journeyman, though i have never run into this and am on my own can anyone offer a little guidence?