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
          • Cable Ampacity - Misconception 1
            Cable Ampacity - Misconception 1 A typical cable sizing misconception is discussed. From: engineering4all Views: 9 0 ratings Time: 05:12 More in Education
          • AMPACITY INNOWICA 2014
            AMPACITY INNOWICA 2014 From: kastom Views: 5 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: 8 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: 6 0 ratings Time: 17:20 More in Music
          • How to Use Table 310.15(B)(16) to Calculate Ampacity
            How to Use Table 310.15(B)(16) to Calculate Ampacity Using Table 310.15(b)(16) to Calculate Ampacity. Chris Coache and Butch Stearns have an in-depth discussion on ampacity and why temperature is critical to un... From: NEC Connect Views: 180 0 ratings Time: 01:07 More in Education
          • Go & See Tour in Essen beim Projekt AmpaCity
            Go & See Tour in Essen beim Projekt AmpaCity eMobility meets Smart Grid: Besuch in der Umspannanlage Herkules, wo RWE im April 2014 das weltweit längste Supraleiterkabel erstmalig in den realen Betrieb ... From: voRWEg gehen mit RWE Views: 158 1 ratings Time: 03:10 More in Entertainment
          • Ampacity - Asimov's Sideburns
            Ampacity - Asimov's Sideburns Live at Fląder 2014. From: bl4ckh0lesun Views: 25 1 ratings Time: 09:19 More in People & Blogs
          • Ampacity - Ultima Hombre
            Ampacity - Ultima Hombre All rights belong to their respective owners.Only For Promotion!!! https://www.facebook.com/ampacityband?fref=ts http://ampacity.bandcamp.com/ www.ampacityba... From: Stoner Deluxe Views: 289 8 ratings Time: 13:15 More in Music
          • Ampacity Masters Of Earth
            Ampacity Masters Of Earth From: Magdalena Wysocka Views: 187 5 ratings Time: 19:06 More in People & Blogs
          • RWE AmpaCity Trailer
            RWE AmpaCity Trailer From: RWEKonzern Views: 225 3 ratings Time: 02:24 More in Science & Technology
          • necconnect Webisode 8 | Breakdown: Ampacity as a Temperature Requirement
            necconnect Webisode 8 | Breakdown: Ampacity as a Temperature Requirement Ampacity as a Temperature Requirement - Chris Coache and Butch Stearns have an in-depth discussion on ampacity and why temperature is critical to understandi... From: NEC Connect Views: 493 0 ratings Time: 05:03 More in Education
          • necconnect Webisode 8 | Breakdown 5: Ampacity and Conditions of Use
            necconnect Webisode 8 | Breakdown 5: Ampacity and Conditions of Use Chris Cloche discusses why ampacity adjustments and corrections based on conditions of use are necessary. Chris also answers a few questions about conditions... From: NEC Connect Views: 731 0 ratings Time: 05:31 More in Education
          • RWE AmpaCity Cinematic Trailer
            RWE AmpaCity Cinematic Trailer Ein Leuchtturmprojekt für den effizienten Stromtransport. Mit dem Projekt Ampacity in Essen erprobt RWE in der Praxis, wie zukünftig der Strom in Ballungsr... From: voRWEg gehen mit RWE Views: 3308 1 ratings Time: 02:24 More in Entertainment
          • 6 15 Conductor Ampacity Summary
            6 15 Conductor Ampacity Summary From: MikeHoltNEC Views: 418 2 ratings Time: 01:09 More in Education
          • Comment calculer Ampacity
            Comment calculer Ampacity From: les poids et mesures Views: 0 0 ratings Time: 01:26 More in Howto & Style
          • Future Trend News #13: AmpaCity,FanWings,UseCloak,Spaghettification,Narrative Clips,Orchids,MH370
            Future Trend News #13: AmpaCity,FanWings,UseCloak,Spaghettification,Narrative Clips,Orchids,MH370 Multi-Paralleluniverses with Many-Worlds, AmpaCity or the Super-Mega Power Conducters, FanWings, Bio Gas, Ho(ok)cer, Curated?, Beacon, UseCloak, Marianne Wil... From: Roman Retzbach Views: 10 0 ratings Time: 08:17 More in People & Blogs
          • Properties of Wire Conductors - Conductor Ampacity
            Properties of Wire Conductors - Conductor Ampacity From: EE306 Views: 72 0 ratings Time: 13:20 More in Education
          • Cómo calcular cobre traza Ancho Ampacity
            Cómo calcular cobre traza Ancho Ampacity From: cálculos financieros Views: 4 0 ratings Time: 02:59 More in Howto & Style
          • ‪Ampacity 2‬
            ‪Ampacity 2‬ Electrical Design. From: technology video tutorials Views: 7 0 ratings Time: 48:47 More in People & Blogs
          • ‪Ampacity 3 ‬
            ‪Ampacity 3 ‬ Electrical Design. From: technology video tutorials Views: 1 0 ratings Time: 50:10 More in People & Blogs
          • ‪Ampacity 1‬
            ‪Ampacity 1‬ Electrical Design. From: technology video tutorials Views: 54 1 ratings Time: 36:02 More in People & Blogs
          • Ampacity
            Ampacity Just a song idea. Fender Jaguar, POD HD500, and Tascam 2488 Neo were used in recording. From: TheRebreather Views: 36 0 ratings Time: 02:06 More in Music
          • NEC 2014 -- Conductor Ampacity (310.15)
            NEC 2014 -- Conductor Ampacity (310.15) Visit http://www.MikeHolt.com/14code to explore Mike's complete range of 2014 NEC training products. For over 35 years Mike Holt Enterprises has specialized ... From: MikeHoltNEC Views: 6964 41 ratings Time: 42:03 More in Education
          • NEC 2014 -- Ampacity of Conductors (445.13)
            NEC 2014 -- Ampacity of Conductors (445.13) Visit http://www.MikeHolt.com/14code to explore Mike's complete range of 2014 NEC training products. For over 35 years Mike Holt Enterprises has specialized ... From: MikeHoltNEC Views: 2360 11 ratings Time: 04:17 More in Education
          • Conductor Ampacity Tables Ch#06 01 22 14
            Conductor Ampacity Tables Ch#06 01 22 14 Conductor Ampacity Tables. From: Chad Kurdi Views: 250 3 ratings Time: 42:31 More in Education

          •      Related on Wikipedia




























               

              Powered free by PHPmotion