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,l7CLHmcX9*F -{Q|^"XL`b1y]$,y *R/2Rn{\xG L*vMP.uKW,)68]Y}+ FYS1B=Q0S>Hc Elevator power disconnect (with utility feed marking) located in the machine room or other permitted location David Herres David Herres holds a New Hampshire Master Electrician's license and has worked as an electrician in the northern part of that state for many years. All Rights Reserved | Contact Us | Privacy Policy. If your specifications require a vent at the top of the shaft for venting smoke, you must provide a key switch with a pilot light to control that vent. For some manufacturers, such as Eaton, testing has been completed to determine the selective coordination ability of current-limiting BussmannTM series fuses with upstream Eaton circuit breakers. 988 0 obj <>stream Elevator cab lights require emergency back-up power. It employs specialists in Mobile, Alabama, and has technical and news correspondents around the world. 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. CLAIMED . The basic idea is that there must be a separate, dedicated circuit for car lights, receptacles and ventilation on each car. 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. The Electrical Ups and Downs of Elevator Design | EC&M 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. tC|[S9G?+uJP>&/TOy o PK ! h-`7 Many professionals believe the NEC is applicable only for voltages over a certain level, but that is not the case. Requirements in Article 620 modify the articles in Chapter 3. Hydraulic elevator pit | Electrician Talk The disconnecting means is to be an externally enclosed, operable, fused motor circuit switch or circuit breaker capable of being locked in the open position. NEC 70620.85 Smoke detectors to recall elevators on Phase I recall are required to be located on each landing, Article 620s Definitions section includes two terms that describe spaces not attached to the outside of a hoistway. 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. Guarding: Where possible, install temporary guarding to protect from inadvertent contact. Depending on your local codes, you can do this by installing heat or smoke detectors within 24 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. The article stands apart from the rest of the code in the sense it exempts these categories of circuits from the general requirements for wiring in most occupancies, found in Chapter 3.