He had been with Eaton (Cutler-Hammer and Bussmann) since 1993 and specializes in training on the design and application of overcurrent protective devices and equipment in electrical distribution systems in accordance with the National Electrical Code and equipment in accordance with the various product standards. Moreover, because motors have a higher starting current than other loads, the overcurrent protection protocol is unique to them and somewhat counterintuitive. When you're designing an electrical system for a building, don't let elevator requirements bring you down. To avoid this situation, designers can specify elevator controls with a safety feature commonly called a rescuvator. Traction elevators are typically faster and more energy efficient than hydraulic elevators, and are often used for high-rise buildings. For example, it is stated that the cross-sectional area of the individual conductors in a wireway are not to exceed 50% of the interior cross-sectional area of the wireway. For platform lifts and stairway chairlifts, the duty is intermittent. Overload protection for motors is to conform with Article 430, Part III, the general code area that covers motor and branch-circuit overload protection for all motors. As stated in Section 7 of the Elevator Industry Field Employees Safety Handbook: Unless it is not feasible, (i.e. Auxilliary gutters are permitted in machine and control rooms between controllers, starters and similar apparatuses. 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. Other requirements: Spa's and Hot Tubs 1996 NEC 15-20 Amp 120 volt Receptacle Requirements for Dwelling units: All outdoor It employs specialists in Mobile, Alabama, and has technical and news correspondents around the world. ASME A17.1 . Many of these are for portable lighting.). The electrical conductors and equipment for non-mine elevators that extend below grade are under NEC jurisdiction. 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 974 0 obj <>/Filter/FlateDecode/ID[<64E135C225F1064D91BC8119D14516A9>]/Index[953 36]/Info 952 0 R/Length 105/Prev 204101/Root 954 0 R/Size 989/Type/XRef/W[1 3 1]>>stream Guarding: Where possible, install temporary guarding to protect from inadvertent contact. The disconnecting means must disconnect the elevator from the emergency, standby and normal power systems. Section 620.37 re-emphasizes that only wiring used in connection with the elevator is permitted within the hoistway, machine room, control room/machinery space or control space. Many professionals believe the NEC is applicable only for voltages over a certain level, but that is not the case. 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). A separate branch circuit shall supply the hoistway pit lighting and receptacle (s). Part of the reason that elevator usage is extraordinarily safe is that construction and maintenance are regulated by the wonderfully robust ASME A17.1 2007/CSA B44-07 Safety Code for Elevators and Escalators, which contains overall construction and maintenance requirements everything from seismic mandates to machine-room lighting. -inch conduit is needed to the sump pump. In the event of a breakdown, that phone must automatically call a location staffed 24 hours a day. Liquid-tight flexible nonmetallic conduit, Flexible cords and cables, or conductors grouped together and taped or corded, are permitted without raceway, where they are part of listed equipment, a driving machine or a driving-machine brake, Flexible metal conduit, liquid-tight flexible metal or nonmetallic conduit, 3/8 in. Thus, the traveling cable must be supported by a steel supporting member. Louisiana State Uniform Construction Code Council adopts the 2014 NEC, Basic three-phase power measurements explained, Safety After the Storm Operating Portable Generators. He has focused on writing since 2006, having written for such magazines as ELEVATOR WORLD, Electrical Construction and Maintenance, Cabling Business, Electrical Business, Nuts and Volts, PV Magazine, Electrical Connection, Solar Connection, Solar Industry Magazine, Fine Homebuilding Magazine and Engineering News. Overcurrent devices protecting these branch circuits are to be located in the machine room or similar location. The electrical energy does not traverse the human body, but proximity to the explosion means severe injury is possible from the intense heat and concussive shockwave. In fact, an entire elevator system for a project is most often designed and specified by the architect who has little understanding of the electrical distribution system. 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. It is further specified the machine-room lighting switch be located at the point of entry. This is not the elevator companys responsibility. Since 1953, Elevator World, Inc. has been the premier publisher for the global vertical transportation industry. To safeguard the passengers and electrical equipment, ASME A17.12.8.2.3.2 requires the power source to the elevator control panel to shut down prior to the discharge of water from a sprinkler head. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. High-rise buildings pose additional concerns. +90 (216) 348 4876, India Office It does specify wiring methods allowed, though, in 620. But, building codes had been in existence for many centuries. A clean and dry elevator pit and machine/control room provided (ASME A17.1 Rule 2.1.2) Machine/control room meets manufacturer's requirement of preserving ambient temperature control and humidity (ASME A17.1 Rule 2.7.9) Elevator floor covering installed with appropriate smoke and flame spread (ASME A17.1 Rule 2.14.2) All Rights Reserved | Contact Us | Privacy Policy. above the seal plate, adjacent to the ladder. Bonding of elevator rails to a lightning-protection system grounding conductor is permitted, but the conductor itself is not to be located in the hoistway. 1. The disconnecting means is also to be a listed device. For instance, one method to reduce the available fault current is to add an isolation transformer ahead of the elevator controller. Motor controllers are permitted outside the spaces specified above. The proposals resulted in adding new requirements in the 2017 NEC for: Marking the elevator controller short-circuit current rating (SCCR) by the elevator control-ler manufacturer. As we have seen, a limited number of these are approved for elevator locations car, hoistway, pit and machine room. Instruments: Use category III multimeters and be familiar with their use and limitations. Traditionally, the electrical system design engineer has given little attention to the elevator controller. Related Code Sections 802.1.8 Indirect/Special Waste, Elevator Pit Drain or Sump Pump ranged from 0.06 cal/cm2 to 0.95 cal/cm2, which indicates that the arc-flash hazard to employees is primarily to the hands and arms. The two documents are in harmony and should be used in conjunction. Motor feeder short circuit and ground-fault protection must be as required in Article 430, Part V for all motors. A single dedicated receptacle supplying a permanently installed sump pump does not have to be a GFCI type. By subscribing, you agree to our User Agreement and Privacy Policy & Cookie Statement. When the elevator car is at the top landing, it is the length of cable as measured from the point of suspension on the car to the bottom of the loop. The locking capability is important so during maintenance, the equipment will not be inadvertently energized. 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. 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. Doors must open in the direction of travel and be equipped with panic bars, pressure plates or other devices that are normally latched but open under simple pressure. Since 1953, Elevator World, Inc. has been the premier publisher for the global vertical transportation industry. 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. All Rights Reserved | Contact Us | Privacy Policy. Hammurabi, sixth king of Babylon and creator of the Babylonian Empire, decreed: If a builder builds a house for someone and does not construct it properly, and the house which he built falls in and kills its owner, then that builder shall be put to death. Here are 23 ways that both chapters and the national office can meet todays major challenge of making members feel valued, IAEIs Online Training allows you to learn at your own pace or live with an expert instructor, from the comfort of your laptop or PC. This requirement applies to all controllers, disconnecting means and other electrical equipment that may need servicing, inspection or maintenance. They are differentiated from other similar structures by the fact that they are not attached to the outside perimeter or surface of the walls, ceiling or floor of the hoistway. You are seeing this message for one of three reasons: You have reached your limit of free content. 3. Cross-sectional areas of conduits are given in Chapter 9, Table 4. Fireman telephone jacks and telephone cabling are typically sufficient for each of these locations. A separate 120VAC, 15A circuit is required for cab lighting and accessories, and it must have its own local disconnect and OCPD in the equipment room as well. You must run a separate insulated grounding conductor with the feeder conductors from the electrical source to the elevator controller. NEC Article 620 contains numerous other disconnect provisions, which must be carefully scrutinized prior to design work so the installation is compliant. Choose topics from a full list of courses covering electrical topics that cover what you need to know from the NEC and other electrical codes and standards. If a smoke detector goes into alarm, it signals the elevator to go into Fire Recall Function, at which point the controller directs the elevator cab to travel to its pre-programmed designated landing, open its doors, and remain stopped there until the alarm clears. A further requirement concerns elevator-car air-conditioning and heating. Selective coordination is also required for multiple elevators per NEC 620.62. For this reason, the NEC provides for adequate working space around electrical equipment that may need to be serviced. The next section, 620.36, concerns different systems in one raceway or traveling cable. C.1.4 ELEVATOR PIT REQUIREMENTS 1. The circuit(s) for the lighting and receptacles must be dedicated to the elevator area only. It is of great importance for the design engineer to communicate with their local authority having jurisdiction (AHJ) to determine fire alarm requirements for the respective elevator installation. 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. 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? Car air-conditioning and heating units 3. +1-251-479-4514 | [emailprotected], Trkiye Office It is mandatory, as in the car, that these items have a separate, dedicated branch circuit, and the required lighting is not to be supplied through a GFCI.