You'll need to run telephone cables to the equipment room control panel, but the elevator supplier will take care of getting the cables to the elevator cab. Both electric and nonelectric elevators are to comply with Article 250, the code article that covers grounding and bonding in general. <> stream Power for the elevator controller must first enter a lockable safety disconnect device, located adjacent to the door of the equipment room. The ASME A18.1-2017 is the Safety Standard for Platform Lifts and Stairway Chairlifts. So to summarize, beginning with elevators having that contract date of January 1, 2009, the 120 volt (non-elevator electrical) circuit has no longer been required to be NEMA Type 4." Sent from my SM-A102U using Tapatalk For circuit breakers, time-current curves must be consulted as well as the circuit breaker manufacturers selective coordination tables. Motor feeder short circuit and ground-fault protection must be as required in Article 430, Part V for all motors. endstream 9 0 obj hbbd```b``WddiLd=XMX;XDrE$c ]"=]LL@"@$f 0 %G SECTION3004 CONVEYING SYSTEMS 3004.1General. This website is using a security service to protect itself from online attacks. To avoid this situation, designers can specify elevator controls with a safety feature commonly called a rescuvator. Section 620.62, Selective Coordination, is central to multi-elevator installations and must be closely observed. Part IX, Grounding, states that metal raceways, Type MC cable, Type MI cable or Type AC cable attached to elevator cars are to be bonded to metal parts of the car bonded to the equipment grounding conductor. . Home Articles Elevator World June 2012 Issue NEC Article 620: Elevators, Part 2. The many codes and guidelines that regulate the electrical design of an elevator can seem overwhelming, and dealing with the electrical inspector, elevator inspector, and Fire Marshal can be even more intimidating. Elevator Pit endobj 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. <> stream /Contents 37 0 R You'll be responsible for specifying the items related to the fire alarm and some controls, as well as supplying lighting and power to the equipment room and elevator pit. [emailprotected] The images below demonstrate hydraulic elevators and traction elevators and show the different locations where the need for sprinklers must be evaluated. The disconnecting means is also to be a listed device. (Cross-sectional areas of conductors are given in Chapter 9, Tables 5 through 8. Similarly, motor branch-circuit short circuit and ground-fault protection must be as required in Article 430, Part IV, for all motors. We're honored to be recognized by our employees and The Dallas Morning News by making the daily newspapers Top 100 Places to Work list for the 3rd year in a row, falling in at 28th in the midsize companies category. Elevator power disconnect (with utility feed marking) located in the machine room or other permitted location David Herres David Herres holds a New Hampshire Master Electrician's license and has worked as an electrician in the northern part of that state for many years. Cross-sectional areas of conduits are given in Chapter 9, Table 4. The standard for Elevator and Escalator Electrical Equipment is the ASME A17.5-2014. The two main types of elevators are hydraulic and traction. The electrical system designer calculates the maximum available fault current at the elevator controller. P Escalators, moving walks, conveyors, personnel hoists and material hoists shall comply with the provisions of Sections 3004.2 through 3004.4. x g*P1S0@ _j !wU!5corVIaVC.|<= Minnesota amendments to those documents are located in chapter 1307. All rights reserved. If the building code does not require sprinkler protection based on occupancy, constructions type, size, or height then the elevator is also not required to be protected. This blog will focus on one aspect of this fire protection; whether or not fire sprinklers are required. It applies to all electrical wiring and equipment . These are the principle NEC 2011 Article 620 mandates. You need at least one 120VAC GFCI-protected receptacle at each location. The conduit alone can't act as the grounding means. You will see an interesting new development below. PDF Compliance with the 2017 NEC for Elevator Controllers It is also important to note that the discussion above is for buildings that require sprinkler protection per NFPA 13. The party responsible for procuring the elevator control panel must state the minimum acceptable SCCR or the maximum available fault current where the controller will be installed. Similar provisions are attached to elevator-car heating and air-conditioning disconnecting means, and to other utilization equipment. If elevators are supplied by the emergency, legally required standby or critical operation power systems, then selective coordination is required per the 2017 NEC in 700.32, 701.27 or 708.54. It is important to note, that these selective coordination tables can indicate a lack of selective coordination at a given fault current for circuit breakers that do not show overlap on the time-current curves of the circuit breakers. This switch will ensure that the elevator won't descend into the elevator pit and allow maintenance people to work safely in the area beneath the cab. Otherwise, specify that the elevator supplier provide a battery back-up unit to power the lights in the event of an outage. The light switch for the equipment room must be adjacent to the entrance door on the latch side. The proposals resulted in adding new requirements in the 2017 NEC for: This article will also discuss other Code requirements that include selective coordination for elevators that are supplied by emergency, legally required standby or critical operation power systems or multiple elevators supplied from a single feeder, and shunt tripping of elevators where the elevator equipment room and/or shaft has a fire suppression sprinkler system.

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