Power for the elevator controller must first enter a lockable safety disconnect device, located adjacent to the door of the equipment room. The circuit(s) for the lighting and receptacles must be dedicated to the elevator area only. You need at least one 120VAC GFCI-protected receptacle at each location. above the seal plate, adjacent to the ladder. The light switch in the pit must be mounted 42 in. The light switch for the equipment room must be adjacent to the entrance door on the latch side. Luminaires must be lensed or equipped with wire guards to protect the lamps. 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.įirst, you'll need to install lighting in the elevator equipment room ( Photo 1) and shaft pit ( Photo 2). Your elevator supplier will take care of all the wiring and related code requirements for the elevator cab and the various controls. A traction elevator's equipment room is typically located at the top of the building, directly over or adjacent to the shaft. The elevator equipment room that serves a hydraulic elevator is almost always located on the lowest floor adjacent to the elevator shaft. Motors for traction elevators were traditionally DC or synchronous, but new installations use AC motors and VFDs for speed control. Traction elevators raise and lower the elevator cab with cables, a pulley system, and counter weights powered by a motor at the main drive wheel. In such cases, it's economically justifiable to specify a traction type elevator. Cylinders in hydraulic elevators usually aren't suitable for buildings taller than five stories. Limit switches placed throughout the height of the shaft communicate with the controller and stop the cab at each landing. Fluid pressure in the cylinder raises and lowers the elevator cab. The pump sends hydraulic fluid from the reservoir to the cylinder, buried deep below the elevator shaft. Hydraulic elevators comprise a hydraulic reservoir, pump, cylinder, and controller. The two main types of elevators are hydraulic and traction. And as the designer, you can become the fulcrum on which all of these requirements and authorities exert their leverage, but an understanding of elevator basics can help you handle the pressure. As they review the plans and the construction site, they may have conflicting interpretations or requirements. 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. Then again, DIY elevators are a thing.When you're designing an electrical system for a building, don't let elevator requirements bring you down. We love the supremely satisfying clickiness of this build, and the reverse engineering prowess on display, but we can’t find much practical use for something like this. The reason remains a mystery, but we suppose that a hotel built by Penthouse publisher would have plenty of secrets. Interestingly, he found logic that prevented the elevator from being called to some floors from anywhere but inside the car. It’s a lovely piece of work, with buttons and lights to mimic the control panel inside the elevator car, as well as the call stations that would have graced each lobby of the hotel. With the original logic in hand, set about building a simulator for the panel. Very clever stuff, and it presented him with the data needed to develop a ladder-logic diagram of the board, with the help of some custom software. This uses a custom PCB with a microcontroller on-board that plugs into each relay socket and probes the connections between it and every other socket. This is a relay-only control panel, after all, with most of the relays missing and a rat’s nest of wires connecting the sockets. The video below highlights his efforts, which were considerable given the age and state of the panel. But fortune favors the bold, and when he found the remains of an elevator control panel in an abandoned Croatian resort hotel, undertook an extensive and instructive reverse-engineering of the panel. Well, at least not opportunities that don’t also include the risk of incarceration. We have to admit that in the hardware hacking universe, there aren’t generally too many chances to hack elevators.
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