As mentioned, traditional installations of a traction or hydraulic elevator include a separate machine room. Accordingly, for this application, the minimum size is reduced to 20 AWG for lighting circuits. IAEI News Magazine. ELECTRIC PASSENGER & FREIGHT ELEVATORS ASME A17.1 2004 Electric Elevator Checklist 2004 Multi-car.doc Page 4 of 44 Page Completed for cars : - Last Updated: 8/1/05 Car Enclosure Electric 2.14 - Hydraulic 3.14 A17.1 (A17.2) COMMENTS CARS 1-6 Operating Control Devices ADA Requirements Part II of Article 620 concerns conductors used in elevator work, and several important requirements are covered. hbbd```b``+3dL `Y[gw9`RLJO*A$w$@L`F*{|0 P This, however, can result in a dramatic increase in cost, space availability (lack thereof), and reduced efficiency. 4.0 (2 Reviews) (2) CLAIMED . The hazards are external to the equipment enclosure since equipment SCCR testing and evaluation criteria for product standards are most often performed with the enclosure doors closed and latched, and the fault occurring external to the enclosure. While machine room-less designs have been commercially available for many years, their use may still be unknown to some AHJs. The Americans with Disabilities Act Accessibility Guidelines for Buildings and Facilities (ADAAG) now require the cab to have a special phone accessible by individuals with disabilities. Within cars, these additional wiring methods are permitted: The following additional wiring methods are permitted on the car assembly in lengths not exceeding 6 ft.: Within machine rooms, these additional wiring methods are permitted: The following wiring methods are permitted on the counterweight assembly in lengths not to exceed 6 ft.: Having looked at NEC 2011 mandates for elevator and related equipment installations, we will cover wiring methods, overcurrent protection, grounding and other related NEC provisions in part two of this series , running in the April 2012 issue of ELEVATOR WORLD. But, building codes had been in existence for many centuries. Many professionals believe the NEC is applicable only for voltages over a certain level, but that is not the case. It is important for design engineers to communicate this with the architect and owner during the design phase, as it will impact space needs elsewhere in the facility to accommodate electrical equipment. Something went wrong. The lighting is not to be connected to a GFCI, because the elevator car is not a place that should experience nuisance tripping. These requirements, found in Article 620 (part of Chapter 6, Special Equipment), are in addition to NEC Chapters 1-3, which stipulate general wiring protocols applicable in most residential, commercial and industrial venues. If the equipment must remain energized to perform work, effective insulation and safe electrical working practices should be observed. The electrical system designer needs to communicate this information to the person responsible for specifying the elevator controller, which is most often the architect. Home Articles Elevator World April 2012 Issue NEC Article 620: Elevators, Part I. GET YOUR CEUS TODAY, 1998-2021. Moreover, it is necessary to consider future worker safety for an indefinite period. 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 architect has a choice of either traction or hydraulic elevators. 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. C.1.4 ELEVATOR PIT REQUIREMENTS 1. The fan should be on a dedicated circuit. Lights and convenience outlets in elevator pits shall be installed to comply with the requirements of CCR, Title 24, Part 3, Article 620. 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. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. The idea is quite simple. All rights reserved. Notwithstanding, if sprinklers are installed in hoistways, machine rooms or the like, the disconnecting means is permitted to automatically open the power supply to the affected elevator(s) prior to the application of water. This is because the material may contribute fuel to a fire that has originated elsewhere. Modern electronic elevator controls can be sensitive to temperature shifts. When you consider that an elevator is an enclosed room with one or more doors that people voluntarily enter so they may travel hundreds of feet up or down, several observations are in order. One. For this reason, the NEC provides for adequate working space around electrical equipment that may need to be serviced. Section 620.85, GFCI Protection for Personnel, provides that 125-V, single-phase, 15- and 20-amp receptacles installed in pits, hoistways, machinery spaces, machine rooms, escalators and moving walks, and on elevator car tops are to be GFCIs. Something went wrong. Next, with multiple elevator banks, the controller will usually allow only one elevator at a time to operate, reducing the amount of emergency power required. , !! Of particular importance is the location of the disconnecting means so it can be found by an individual who may not be familiar with the installation. You are seeing this message for one of three reasons: You have reached your limit of free content. The branch circuit is to be protected by an overcurrent device located in the machine room, control room/machinery space or control space. The conductors must be in their original sheaths or grouped together and taped or corded. There are options available to achieve this depending upon the customers needs. It need not be exactly centered on the equipment, and working spaces of adjacent pieces of equipment may overlap. Nevertheless, the primary NEC focus is on elevators, and the intention is to mitigate the hazards associated with the use of electricity. Guarding: Where possible, install temporary guarding to protect from inadvertent contact. f?3-]T2j),l0/%b Any other utilization equipment associated with the elevator Cross-sectional areas of conduits are given in Chapter 9, Table 4. Your elevator supplier will take care of all the wiring and related code requirements for the elevator cab and the various controls. This lighting and receptacle circuit is separate from the circuit serving the motor. Limit switches placed throughout the height of the shaft communicate with the controller and stop the cab at each landing. Furthermore, at least one 125-V, single-phase, 15- or 20-amp duplex receptacle is to be provided in each machine room or similar location. As they review the plans and the construction site, they may have conflicting interpretations or requirements. Dan Neeser is a Senior Field Application Engineer with Eatons Bussmann Division. In some cases, it may require a means to test the shunt trip operation or have one contact operate the shunt trip of more than one elevator. For elevators that regenerate power back into a power source unable to absorb the regenerative power under overhauling elevator load conditions, a means to absorb this power is to be provided. Use Underwriters Laboratories or Canadian Standards Association-labeled scopes tested for 1,000 V. Lockout/tagout: When troubleshooting is complete and further work can be accomplished without the equipment being energized, follow the lockout/tagout procedures in Section 7 of the. ), advise the building owner to correct the condition. This clear working space must be 30 in. The main impetus for the creation of the NEC in the closing years of the 19th century was the collective anguish experienced by insurance underwriters who were losing vast amounts of money due to liability and physical damage claims resulting from Edisons electrification of, first, Lower Manhattan and then the world. . . If we fast forward more than 36 centuries, we see some important new developments in elevator technology. of the sprinkler heads. q!^mDtsnEX3_ shvqu+X9@w3gSj`g The traveling cable or raceway is also permitted to include shielded conductors and/or one or more coaxial cables. Thus, the need for door interlock functionality is recognized. So, we see that for elevator work, greater fill is allowed. It is of great importance that power to the various elevator functions can be quickly and reliably removed from the loads in case of emergency or for maintenance and troubleshooting. This website is using a security service to protect itself from online attacks. 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. The cord is to be a hard-usage, oil-resistant type not over 6 ft. in length. From the website: Mohawk Lifts offers car lifts and auto lifts for purchase, including 2 post lifts, 4 post lifts, storage lifts, heavy duty mobile column lifts, parallelogram lifts, and other specialty items. -inch conduit is needed to the sump pump. Article 511 provides the requirements for commercial garages areas used for the storage or repair of self-propelled vehicles that use combustibles (liquid or gas) for power. After reading this article, you should have learned about: The meanings of definitions for control room and control space versus machine room The purpose and specifications for working spaces Insulation types and minimum sizes of conductors Requirements for feeder and branch-circuit conductors Feeder demand factors for ele-vators. The traveling cable, of necessity, is exempted. 836 Troy Schenectady Road ; Latham, NY 12110 . (g) Stop Switch in Pits. Many new buildings are incorporating an elevator design that does not include an equipment room (sometimes called machine room-less elevators). Auxilliary gutters are permitted in machine and control rooms between controllers, starters and similar apparatuses. These conductors may be covered with suitable shielding for telephone, audio, video or higher-frequency communications circuits. NEC 2011 also addresses branch circuits for machine room or control room/machinery space or control-space lighting and receptacles. Conductors supplying more than one motor, motor controller or power transformer are to have an ampacity not less than the sum of the nameplate current ratings of the equipment plus all other connected loads. Follow the manufacturers instructions and precautions. The demand factor ranges from 1.00 for one elevator on a single feeder to 0.72 for 10 or more elevators on a single feeder. Conductors supplying a single power transformer are to have an ampacity not less than the nameplate current rating of the power transformer plus all other connected loads. above the seal plate, adjacent to the ladder. Elevator motors are inherently intermittent duty. These must also be insulated for the maximum voltage applied to any conductor within the cable or raceway system. Smoke detectors, which are required in all elevator lobbies and elevator equipment rooms, must be connected to the elevator controllers directly by means of auxiliary contacts and wiring, or indirectly by means of output signals from the fire alarm control panel. 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. or larger is permitted to be installed in lengths in excess of 6 ft. Where motor-generators, machine motors or pumping-unit motors and valves are located adjacent to or underneath control equipment and provided with extra-length terminal leads not exceeding 6 ft. in length, such leads are permitted to be extended to connect directly to controller terminal studs without regard to carrying-capacity requirements. An example would be the elevator, as well as all wiring in a utility-owned administration building. 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).

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