nec elevator pit requirements

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 is because the material may contribute fuel to a fire that has originated elsewhere. The architect has a choice of either traction or hydraulic elevators. The next section, 620.36, concerns different systems in one raceway or traveling cable. 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. There are options available to achieve this depending upon the customers needs. It states an elevator is permitted to be run by an emergency or standby power system. The disconnecting means is to be in the machine room or similar location, with provision for being locked in the open position. For instance, a typical elevator controller may traditionally have SCCR ratings from 5 to 10 kA. It is worth noting that these NEC terms, used throughout Article 620, have been chosen to correlate with A17.1-2007 usage. David Herres 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. Society of Mechanical Engineers. In an elevator machine room, where space may be limited in the first place, the working-space mandate must be factored in very early in the design process lest an unthinkable amount of rework be necessary. (All intentionally grounded elements must be held at equal potential.) Generally, it is decreed that the supply voltage is not to exceed 300 V between conductors (allowing for the familiar 240-V concept), although there are exceptions. A single means for disconnecting all ungrounded main power-supply conductors is required and must be designed so no pole can be operated independently. The conduit alone can't act as the grounding means. The cord is to be a hard-usage, oil-resistant type not over 6 ft. in length. Fuses: Verify that the correct size, type and capacity are installed. Pits shall be maintained in a clean and dry condition. The circuit(s) for the lighting and receptacles must be dedicated to the elevator area only. Pit light with guard (ten foot candles min. 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. These are the individual branch circuits required for car lighting, receptacles, auxiliary lighting and ventilation on each elevator car; individual branch circuits for machine-room and similar location lighting and receptacle; and branch circuits for hoistway pit lighting and receptacle(s). The disconnecting means is to be located adjacent to or an integral part of the motor controller. 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. tC|[S9G?+uJP>&/TOy o PK ! You need to Subscribe to continuing reading. Acceptable types of wire for this application are given in Table 400.4, which occurs in an earlier chapter and lists various types of elevator cable for lighting and control in both unclassified and hazardous locations. NEC Article 620 covers elevators, dumbwaiters, escalators, moving walks, platform lifts and stairway chairlifts. 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. 3. This room is to be secured against unauthorized access (kept locked). These may include: The author would like to recognize Jonathan Kennedy for his assistance in creating this article. You must run a separate insulated grounding conductor with the feeder conductors from the electrical source to the elevator controller.

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