Ampacity derating factors for cables buried in short segments of conduit


     Related Videos
Stroke Risk Factors
  • Stroke Risk Factors

  • Dr. Daniel Barrow, chief of Neurosurgery at Emory University Hospital discusses possible stroke risk...

Hypertension Risk Factors Health Tip
31 Why So Many Species? The Factors Affecting Biodiversity
Grapes may aid heart risk factors
31 Why So Many Species? The Factors Affecting Biodiversity

     Related Hubpages

  •  Doc. Url:    Embed Code: 

  • IEEE  status
    (0) (0 Votes)
    Views: (2034)   Date: (Publication Date: April 2005)   Pages: ()
  • Author:  Vaucheret  P. Hartlein  R.A. Black  W.Z. ECL-Pechincy-Alcan  Ronchin  France;  

  • Abstract:  Abstract Buried cables are often routed through short segments of conduit, and when this situation occurs, the ampacity must be reduced or the cable will overheat as a result of the high thermal resistance created at the location of the conduit. This problem is examined for extruded cables by using a finite element heat transfer software program to determine the derating in ampacity that cables in conduits must experience in order to remain below a maximum conductor temperature. The derating factors are provided as a function of conduit length, soil resistivity, burial depth and number of cables in the conduit. The results show that once the length of conduit exceeds about 20 times its outer diameter, then the ampacity of the circuit must be reduced to the value that it would have if the entire length were buried in the conduit. Factors that result in lower cable ampacities, such as high soil thermal resistivity and deeper burial depths lead to larger derating factors.

     Related Documents

         Related Groups

           Related Science News

             More on Sciencestage

               Answers

                 News

                   Related on Youtube Results
            • How to Pronounce Ampacity
              How to Pronounce Ampacity Learn how to say Ampacity correctly with EmmaSaying's "how do you pronounce" free tutorials. @---@---@---@---@---@---@---@---@---@---@---@---@---@ Check out ... From: Emma Saying Views: 0 0 ratings Time: 00:16 More in Education
            • Ampacity Font Download
              Ampacity Font Download Ampacity Font Download Download : http://myfonts.us/OMLRJ7 Gallery and Sample : http://myfonts.us/hDOnii Ampacity Font Download, Ampacity Font Family, Ampaci... From: Andrea Rubasova Views: 0 0 ratings Time: 01:01 More in Science & Technology
            • 180 Tage AmpaCity
              180 Tage AmpaCity Seit inzwischen 180 Tagen fließt Strom durch das 10.000 Volt-Supraleiterkabel im Essener Stromnetz. Dass AmpaCity als eines der richtungsweisenden Energiewen... From: voRWEg gehen mit RWE Views: 100 1 ratings Time: 04:01 More in Science & Technology
            • How-To Calculate Unit Ampacity
              How-To Calculate Unit Ampacity From: Huk Ter Views: 0 0 ratings Time: 01:24 More in Howto & Style
            • Ampacity, Niemenazywo Live@Neptun, Gdansk (2014.10.12)
              Ampacity, Niemenazywo Live@Neptun, Gdansk (2014.10.12) From: Pawel Wojciechowski Views: 7 0 ratings Time: 18:09 More in Music
            • Ampacity, Niemenazywo Live@Neptun, Gdansk (2014.10.12)
              Ampacity, Niemenazywo Live@Neptun, Gdansk (2014.10.12) From: Pawel Wojciechowski Views: 5 0 ratings Time: 04:34 More in Music
            • Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 9/9
              Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 9/9 From: Obrazowo Views: 13 0 ratings Time: 07:07 More in People & Blogs
            • Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 8/9
              Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 8/9 From: Obrazowo Views: 11 0 ratings Time: 04:47 More in People & Blogs
            • Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 6/8
              Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 6/8 From: Obrazowo Views: 5 0 ratings Time: 10:00 More in People & Blogs
            • Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 4/8
              Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 4/8 From: Obrazowo Views: 2 0 ratings Time: 10:00 More in People & Blogs
            • Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 7/9
              Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 7/9 From: Obrazowo Views: 5 0 ratings Time: 10:00 More in People & Blogs
            • Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 5/8
              Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 5/8 From: Obrazowo Views: 6 0 ratings Time: 10:00 More in People & Blogs
            • Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 2/8
              Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 2/8 From: Obrazowo Views: 4 0 ratings Time: 10:00 More in People & Blogs
            • Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 3/8
              Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 3/8 From: Obrazowo Views: 24 0 ratings Time: 10:00 More in People & Blogs
            • Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 1/8
              Ampacity -"Ostatni rozkaz"/Nieme na żywo/kino Neptun/Gdańsk 17.10.2014 1/8 https://www.facebook.com/K3Marcello?fref=ts. From: Obrazowo Views: 105 2 ratings Time: 10:00 More in People & Blogs
            • ‪Ampacity 2 U#6 10 06 10 wmv‬
              ‪Ampacity 2 U#6 10 06 10 wmv‬ From: technology video tutorials plus Views: 0 0 ratings Time: 48:47 More in People & Blogs
            • ‪Ampacity 3 U#6 10 06 10 wmv‬
              ‪Ampacity 3 U#6 10 06 10 wmv‬ From: technology video tutorials plus Views: 0 0 ratings Time: 50:10 More in People & Blogs
            • ‪Ampacity 1 U#6 10 05 10 wmv‬
              ‪Ampacity 1 U#6 10 05 10 wmv‬ From: technology video tutorials plus Views: 1 0 ratings Time: 36:02 More in People & Blogs
            • 2014 NEC® - Generator Conductor Ampacity [445.13]
              2014 NEC® - Generator Conductor Ampacity [445.13] I created this video with the YouTube Video Editor (http://www.youtube.com/editor) From: MikeHoltNEC Views: 1331 10 ratings Time: 04:11 More in Education
            • Conductor Ampacity & wiring Methods EWR Ch#04 2 09 02 14
              Conductor Ampacity & wiring Methods EWR Ch#04 2 09 02 14 Conductor Ampacity & wiring Methods. From: Chad Kurdi Views: 58 1 ratings Time: 01:31:24 More in Education
            • Conductor Ampacity & wiring Methods EWR Ch#04 1 09 02 14
              Conductor Ampacity & wiring Methods EWR Ch#04 1 09 02 14 Conductor Ampacity & wiring Methods. From: Chad Kurdi Views: 90 1 ratings Time: 01:45:50 More in Education
            • Cable Ampacity - Misconception 1
              Cable Ampacity - Misconception 1 A typical cable sizing misconception is discussed. From: engineering4all Views: 13 0 ratings Time: 05:12 More in Education
            • AMPACITY INNOWICA 2014
              AMPACITY INNOWICA 2014 From: kastom Views: 22 0 ratings Time: 03:54 More in People & Blogs
            • Ampacity - Live at Red Smoke Festival, Pleszew, Poland, 26.07.2014 - Part 1
              Ampacity - Live at Red Smoke Festival, Pleszew, Poland, 26.07.2014 - Part 1 Poor quality, but it gives something like VHS-climate ;) And it works great with Ampacity's amazing music trip. From: Earanil Views: 80 0 ratings Time: 21:59 More in Music
            • Ampacity - Live at Red Smoke Festival, Pleszew, Poland, 26.07.2014 - Part 2
              Ampacity - Live at Red Smoke Festival, Pleszew, Poland, 26.07.2014 - Part 2 Poor quality, but it gives something like VHS-climate ;) And it works great with Ampacity's amazing music trip. From: Earanil Views: 28 0 ratings Time: 17:20 More in Music

            •      Related on Wikipedia




























               

              Powered free by PHPmotion