Electrical · E-V6FEA

Generator to Multiple Elevator Interface Wiring

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This diagram details the interface wiring between an automatic transfer switch, building management system panel, and multiple elevator machine room controllers. Pre-transfer signal dry contacts provide closure thirty seconds after transfer back to normal power, while emergency position dry contacts close when connected to the generator. Two number fourteen gauge wires connect each elevator controller from the pre-transfer and emergency position contacts using different color wire pairs for each elevator. Elevator controls are programmed to operate only one elevator at a time on generator power.

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