File:T ratings oldest trick in the book 012.png

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Description
English: Furnace view of firestop test sample leading to UL Through-Penetration Firestop Listing C-BJ-8028. This test includes a 4000A aluminium and a 5000A copper bus duct.
Deutsch: Sicht innerhalb der Brandkammer während einer Abschottungsbrandprüfung bis zu ca. 1100°C. Diese Prüfung führte zu bauaufsichtlicher Zulassung UL System C-BJ-8028. Durchbrüche beinhalteten zwei Stromschienen: 4000A Aluminium und 5000A Kupfer.
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Author Achim Hering

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current03:04, 29 September 2015Thumbnail for version as of 03:04, 29 September 201512,465 × 7,002 (1.95 MB)Achim Hering (talk | contribs){{Information |Description ={{en|1=Furnace view of firestop test sample leading to [http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/showpage.html?name=XHEZ.C-BJ-8028&ccnshorttitle=Through-penetration+Firestop+Systems&objid=1082380546&cfgid...

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