Related Code Sections 802.1.8 Indirect/Special Waste, Elevator Pit Drain or Sump Pump The light switch for the equipment room must be adjacent to the entrance door on the latch side. Modern electronic elevator controls can be sensitive to temperature shifts. Compliance with the 2017 NEC for Elevator Controllers Additionally, ampacities of the individual conductors and flame-retardant properties of the overall cable are important factors. Elevator cab lights require emergency back-up power. For just $7.99 per month, you can gain access to more than 5,000 articles from all Elevator World Publications, this includes EW Global, EW Europe, EW India, EW Middle East, EW Turkey, and EW UK. These are part of Article 725, Class 1, Class 2 and Class 3 Remote-Control, Signaling, and Power-Limited Circuits. Limit switches placed throughout the height of the shaft communicate with the controller and stop the cab at each landing. In order to comply, the electrical system designer must determine the maximum available fault current at the elevator disconnecting means and assure the elevator disconnecting means overcurrent protective device will clear any overcurrent condition, up to the maximum available fault current, before any upstream overcurrent devices will operate. It employs specialists in Mobile, Alabama, and has technical and news correspondents around the world. ), advise the building owner to correct the condition. This may include wiring for signals, communication with the car, lighting, heating, air-conditioning and ventilation of the car or hoistway for fire-detecting systems and pit sump pumps. Sign up for our free e-newsletter. Hint: Duct Tape to the Rescue, NEC: Air Conditioning and Refrigerating Equipment Part 5. Flexible cords and cables part of listed equipment operating at 30 V (42 VDC) or less, similarly supported and protected, jacketed and flame retardant, are permitted. Suspending the cables from the supports by a means that automatically tightens around the cable when tension is increased for unsupported lengths up to 200 ft. An NEC Informational Note defines unsupported lengths. Elevator Pit Drain or Sump Pump | UpCodes 836 Troy Schenectady Road ; Latham, NY 12110 . This is the area within the hoistway beneath the car, and there are occasions when elevator technicians have to work in this area for maintenance and troubleshooting. First, it is now clear that elevator controllers must be marked by the manufacturer with their SCCR. The idea is quite simple. Heating and air-conditioning equipment located on the car must not be in excess of 600 V. All live parts of electrical apparatuses are to be enclosed to protect workers and the public against accidental contact. 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. It states an elevator is permitted to be run by an emergency or standby power system. A traction elevator's equipment room is typically located at the top of the building, directly over or adjacent to the shaft. These must also be insulated for the maximum voltage applied to any conductor within the cable or raceway system. Besides the initial determination requirement of paragraph (c) (1), the "host" employer must comply with the five (5) requirements of paragraph (c) (8) when engaging another employer (contractor) who will have employees in permit spaces under the control of the host employer. The new ADAAG guidelines now require that emergency power be available to elevators that have four or more stories of travel above or below the accessible floor [4.1.3(9)(1)]. (C) Duplex Receptacle. Corporate Office Also located in this room might be, but not limited to: exhaust fan, cooling unit (depending on local requirements and/or requirements set forth by the individual elevator supplier), lighting, voice and/or data drop serving the elevator cab emergency phone, elevator controller primary fused disconnect, elevator feeder shunt-trip circuit (i.e., shunt-trip circuit breaker), elevator cab lighting fused switch, and convenience receptacle(s). It is important, where mandated, that there be no more than a single disconnecting means, so if emergency action is required, first responders will not be able to power down the equipment from one location. In a time when increasing value is placed on even small amounts of real estate, elevator design must strive to configure, efficiently control and drive elements to whatever degree possible, and that is the thinking behind some alternate locations for these structures. The circuit(s) for the lighting and receptacles must be dedicated to the elevator area only. This is important as the tradition of using only time-current curves for the analysis of overcurrent device operation is usually not sufficient since the time-current curves traditionally stop at 0.01 second (not time zero). The traveling cable or raceway is also permitted to include shielded conductors and/or one or more coaxial cables. The sump pump/drain shall have the capacity to remove a minimum of 11.4 m. 3 /h (3,000 gal/h) per elevator. A traditional elevator installation (which includes a machine room) requires access inside the elevator shaft. The Uniform Building Code requires two-way communications between the central command center and the elevators, each elevator lobby, emergency power rooms, and by entries into enclosed stairways (Section 403.5.3). 2.2.2.6 . Specifically, Section 725.43 provides that overcurrent protection for conductors 14 AWG and larger is to be provided in accordance with the conductor ampacity without applying ampacity adjustment and correction factors. To address this issue, Code Making Panel (CMP) 12 of the National Electrical Code acted on several proposed changes to Article 620 during the revision cycle for the 2017 NEC that deal with the proper installation of elevator controllers. This is typically accomplished via a shunt trip device. As such, elevator controller manufacturers should make the effort to rethink their designs to avoid costly system design changes. Luminaires must be lensed or equipped with wire guards to protect the lamps. Part II of Article 620 concerns conductors used in elevator work, and several important requirements are covered. (All intentionally grounded elements must be held at equal potential.) 23.254.250.15 ASME A17.1, Section 2.2.5, National Electrical Code, Rule 620-85 4. You can email the site owner to let them know you were blocked. For example, wiring that is under exclusive utility control and has to do with the generation and distribution of electrical power is not NEC regulated. PDF C.1 General Requirements for All Elevator Installations Because of this, there is often a communications gap between the electrical system designer, whose design typically stops at the required elevator disconnecting means, and the architect who designs the elevator system. You are a subscriber that needs to Sign In. This device must be either a fused disconnect or a circuit breaker because ANSI/ASME A17.1 requires you to install an additional overcurrent protection device (OCPD) in the elevator equipment room. Flexible cords and cables in lengths not to exceed 6 ft. of a flame-retardant type and located to be protected from physical damage are permitted in machine rooms without being installed in a raceway. Flexible metal, liquid-tight flexible metal or liquid-tight flexible nonmetallic conduit 3/8 in. First, you'll need to install lighting in the elevator equipment room (Photo 1) and shaft pit (Photo 2). All rights reserved. Part VII, Overcurrent Protection, divides this topic into four categories for elevators and similar equipment, depending upon the nature of the specific equipment: For operating devices and control and signaling circuits, protection against overcurrent is in accordance with the requirements of Sections 725.43 and 725.45. A single dedicated receptacle supplying a permanently installed sump pump does not have to be a GFCI type. C.1.4 ELEVATOR PIT REQUIREMENTS 1. Additionally, duty on elevator and dumbwaiter motors is rated as intermittent, whereas duty on escalator and moving-walk motors is considered continuous. The Electrical Ups and Downs of Elevator Design | EC&M Get directions, reviews and information for Eazylift Albany LLC in Latham, NY. This requirement applies to all controllers, disconnecting means and other electrical equipment that may need servicing, inspection or maintenance. The basic requirement is for minimum clear distances of various depths for equipment operating at 600 V or less, nominal, depending upon voltage to ground and lateral distance to insulated or grounded surfaces or exposed live parts (not an issue in elevator machine rooms). Something went wrong. Otherwise, specify that the elevator supplier provide a battery back-up unit to power the lights in the event of an outage. Electricity is often one of the initial services to fail during a storm. Granle is a licensed professional engineer with Sebesta Blomberg & Associates, Rochester, Minn. https://www.facebook.com/ElectricalConstructionMaintenanceMagazine, https://www.linkedin.com/company/electrical-construction-maintenance/, ABCs Construction Backlog Indicator Down to Start 2023, The Most Popular Code Quizzes of the Week from 2021, The 10 Most Popular Photo Galleries of 2021, Whats Wrong Here? Part VIII, Machine Rooms, Control Rooms, Machinery Spaces, and Control Spaces, states elevator and similar-installation driving machines, motor-generator sets, motor controllers and disconnecting means are to be installed in a room or space set aside for that purpose. As recommended in NFPA 70E, the National Elevator Industry, Inc. (NEII) commissioned an arc-flash hazard analysis (in compliance with IEEE Standard 1584-2002 for procedures for calculating the incident energy of the arc flash) by an independent consultant to determine at what level an arc-flash hazard exists to employees who work on energized elevator equipment.
