Article 352 rigid nonmetallic conduit type rnc wiring. Article 392 of the national electrical code lists the specific requirements. Both the zone system and the division group classify the different gases in ascending order of more easily ignitable. City of phoenix amendments to the 2008 national electrical code nec approved on april 1, 200. Copies of proposals are published in the nec rop for the 20 annual revision cycle. The child care and development block grant act established the child care subsidy program as a block grant in 1992. We will honor all prepaid classes when we are able to resume and will add additional days to accomodate missed dates. Bonding is the permanent joining of metallic parts. Nec 2017 code changes chapter 3 wiring methods and materials changes from the 2014 code are highlighted in yellow. Dollard local 98 philadelphia electrical jatc this session is eligible for 1 continuing education and 1 contact hours.
The nec 2017 is upon us, and the following represents a synopsis of how it has changed over the 2014 code. Article 388 1999 nec article 352 part b surface nonmetallic raceways article 388 surface nonmetallic raceways. Reprinted with permission from nfpa 70hb14, the national electrical code. Afcis help protect individuals and families from injuries andor death by detecting dangerous arcing in electrical wires and shutting down an electrical system before a fire can start. Nec 2017 code changes chapter 3 wiring methods and. Cable tray size as per national electrical code2002. An attempt is made in every nec article to follow a specific format in order to make the code as easy to read as possible. Per nec 392, the national electrical code section for. The navy enlisted classification nec system, of which the nec coding system is a part, supplements the enlisted rating structure in identifying personnel on active or inactive duty and billets in manpower authorizations. Article 392 covers cable tray systems, including ladder, ventilated trough, ventilated channel, solid bottom, etc. The scope of every article is provided first with a.
Overview of significant 2017 nec changes florida building. Safely installing, maintaining and inspecting cable trays. The nfpa received 4,012 public inputs pis recommending code changes. Article 392 does allow these types to be installed as power conductors if they are larger than 10 and marked for use in tray. Electrical equipment may be mounted on or supported by a structure such as a concrete pad for outdoor equipment clarifies pedestals such as. New articles 425 fixed resistance and electrode industrial process heating equipment 691 largescale photovoltaic pv electric power production facility 706 energy storage systems 710 standalone systems 712 direct current microgrids. We close with article 392, a support system, and the last string articles 394 through 398 for open wiring. At this time we would like to thank you for your support.
Nec 3 short contract ecsc and short subcontract ecss. Chapter methods and materials mike holt enterprises. With the series concluded, this article collects each entry and both webinars into a single location. Nec 3 engineering and construction contract ecc and subcontract ecs nec 3 professional services contract psc. In this brief video i provide an overview of the 5 new nec articles in the 2017 nec, including. Article 505 was rewritten because the division classification and the zone classification were difficult to merge. Group a in the nec division system is the most easily ignitable acetylene, whereas group a. An indepth look at the 2005 nec, section 392 types of cable trays. Significant changes electrical contractor magazine. Ground wires must be larger than 4 awg but are not required to be marked. A look at the 2017 nec significant changes a look at the 2017 nec significant changes michael j. The 2017 edition of the nec includes five 5 new articles, three of which focus on the generation, distribution, and storage of electrical power, areas of considerable interest and activity in the electrical industry.
Cable tray manual based on the 2014 national electrical code cable tray manual 2014 cable tray manual bline series cable tray systems man1 eaton mark shown is the property of its respective owner. Cable tray and cable management nema catalog eaton. The course addresses additional code revisions that apply to all types of occupancies. This table gives you an ampacity of 496 a for a 500 mcm, 75 c conductor at 40 c ambient temp, or 560 amp at 30 c ambient temperatura using the. Notice as you read through the various wiring methods that, for the most part, the section numbering remains the same in each article. Multiconductor cables rated 600 volts or less shall be permitted to be installed in the same cable tray.
Once there, click on the free access tab and select the applicable year of nfpa 70 national electrical code. According to nec article 392, multiconductor tray cable may be installed in any standard cable. Article 691 of the 2020 national electrical code nec provides the requirements for largescale photovoltaic pv supply stations that are not under exclusive electric utility control. National electrical code chapter 2 article 200 covers the use and identification of grounded conductors, providing requirements for identification of terminals, wiring systems, and grounded conductors. Article 425 fixed resistance and electrode industrial process heating equipment. Cable tray is classified by the nec nfpa 70 the national electrical code as a. Combine components to configure a system that meets application requirements.
Article 300 general requirements for wiring methods and materials part i. Article 392 cable trays wiring methods and materials. Nec codes identify a nonratingwide skill, knowledge, aptitude, or qualification that must be documented to identify people. When using solid bottom cable tray, the allowable cable area is reduced from 50% to 40%. Cable types that are not presented in the table include singleconductor building wire types such as thhnthwn, xhhw and rhhrhw. Article 430, part vi, where tapped from the load side of the motor branchcircuit protective. There were 3,745 proposals and 1,625 public comments for. Metallic cable trays that support electrical conductors shall be grounded as required for conductor enclosures in accordance with 250. These codes assist in the assigning of billets and in manpower authorizations. That which is built or constructed, other than equipment electrical. A cable tray system is a unit or assembly of units or sections and associated fittings. Rapid shutdown increased from 3 words to over 1100 words. Carlon 2002 national electrical code changes pertaining to. This type of conduit must not be used in hazardous locations except where permitted by sections 503.
Derating factors shall not apply to conductors in nipples having a length not exceeding 600 mm 24 in. All questions are listed in straight order not random order throughout the complete quiz. Quick tray pro wire mesh cable tray system networking racks. In the 1999 nec this product was part b of the surface metal raceway article. Ii no of single conductor cables wiring methods and materials changes from the 2014 code are highlighted in yellow.
An accommodation combining living, sleep ing, sanitary, and. Where only qualified maintenance personnel are available, certain cables are permitted in ladder, ventilated trough, and ventilated channeltype cable trays. For these hours to appear on your certificate, you must. As the 2017 nec development cycle came to a close, we embarked on a tenpart series of articles and a twopart webinar detailing the most significant changes in the 2017 nec.
However, the ampacity of singleconductor cables are restricted to the requirements of 392. Article 392 1999 nec article 318 cable trays table 392. Wiring harness manufacturing is a sophisticated and challenging business where quality, accuracy, and speed are essential to success. Ventilated cable trays provide for the greatest allowable fill due to increased airflow. Dc loads, standalone systems ac loads, and battery storage systems have historically been considered part of article 690. Nec codes identify a nonrating wide skill, knowledge, aptitude, or qualification. E29 a look at the 2017 nec significant changes johnston.
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