Selective coordination in elevators
Selective coordination is required when more than one elevator is supplied by a common feeder, per NEC Article 620-62. Figure 2 shows an example of a coordination study illustrating the feeder breaker overcurrent protection, the elevator fuse overcurrent protection, and the elevator motor start-up curves.
Keith Lane is president and CEO of Lane Coburn & Assocs. He is a member of the Consulting-Specifying Engineer editorial advisory board, and was a 2008 40 Under 40 award winner. Lane has more than 20 years of experience designing, commissioning, and optimizing mission critical facilities.
– See how selective coordination studies are used in mission critical environments below.