Short-circuit Faults on Electrical Wires Exposed to External Radiant Heat

• HAGIMOTO Yasuaki

  National Research Institute of Police Science

• WATANABE Norimichi

  National Research Institute of Police Science

• OKAMOTO Katsuhiro

  National Research Institute of Police Science

Bibliographic Information

Other Title

• 放射熱による電気配線の短絡
• ホウシャ ネツ ニ ヨル デンキ ハイセン ノ タンラク

Abstract

Short-circuit faults on electrical cords exposed to external radiant heat are usually initiated by an arcing through charred insulating material or a physical (metal-to-metal) contact of hot conductors. In this study, various types of PVC and rubber-insulated power cords were exposed to external radiant heat by using a cone heater and initial electrical activities on the cords were investigated. Types of short-circuits depended upon the size and types of cords, materials of insulation, strength of external radiant heat, and duration of exposure to the heat flux. Physical shorts occurred on PVC-insulated cords at 20 kW/m² when their conductors were twisted or pinched. PVC-insulated cords required 40 kW/m² to start arcing shorts. Arcing shorts occurred on rubber-insulated cords at 20 kW/m², though physical shorts did not occur at 40 kW/m². The authors discussed on when and how short-circuit faults are produced on electrical cords under exposure to external radiant heat.

Journal

• Bulletin of Japan Association for Fire Science and Engineering

  Bulletin of Japan Association for Fire Science and Engineering 54 (2), 49-55, 2004

  Japan Association for Fire Science and Engineering

Details

• CRID: 1390001205948297600
• NII Article ID: 10013767248
• NII Book ID: AN0018688X
• DOI: 10.11196/kasai.54.2_49
• ISSN: 18835600
• ISSN: 05460794
• NDL BIB ID: 7144932
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7144932
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed