nec elevator pit requirements

While the definitions are straightforward, their deployment in real-life building projects involves enormous legal and moral implications, given the fact that we are carrying large numbers of people hundreds of feet above the earths surface on a daily basis. PDF Elevator Acceptance Inspections - Tennessee %%EOF We shall now take a look at the principle requirements of Article 620, with particular emphasis on wiring requirements for elevator shafts, machine rooms and cars. q!^mDtsnEX3_ shvqu+X9@w3gSj`g This clear working space must be 30 in. If power is not being supplied to the elevator controller (e.g., open mainline fuses, etc. NEC Guidelines on Commercial Garages. The cover shall be secured and level with the pit floor. Something went wrong. For elevators with battery lowering systems, an additional contact must be supplied and wired to disable the battery lowering system when the elevator disconnect is manually operated for maintenance. Where necessary, it is mandated that suitable guards be provided to protect the cables against damage. Conductors supplying a single motor are to have an ampacity not less than the percentage of motor nameplate current determined from Section 430.22(A) and (E). Pit drainage must be designed to eliminate a minimum capacity of 3,000 gallons per hour (or 50 GPM) per elevator car. If the smoke detector at the designated landing goes into alarm, the elevator will stop at a predetermined alternate floor, which is usually the floor above the designated floor. The disconnecting means is to be located adjacent to or an integral part of the motor controller. It is stated that traveling cables are to be suspended at the car and hoistway ends, or counterweight end where applicable, so as to reduce the strain on the individual copper conductors to a minimum. Elevator cab lights require emergency back-up power. It is further specified the machine-room lighting switch be located at the point of entry. It need not be exactly centered on the equipment, and working spaces of adjacent pieces of equipment may overlap. Performance & security by Cloudflare. First, the ATS signals the elevators that it's about to switch over to emergency power preferably 30 sec or more prior to switching, which allows the elevator controller to bring each elevator cab to the nearest landing and stop, thus protecting the motors and electrical system.

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