[BC] KOMO Fire

[RichardBJohnson at comcast.net]

It is bus duct, and is a sandwich of copper bus-bar and insulation, encased in steel. The joints are held together by compression from a few bolts, and the failure was at one of the corner joints. It is an all-too-common "modern" construction which allows the main bus wiring to be installed as though it was simply wall-board strapping. There are many more failures in store for this kind of construction.

Cheers,
Richard B. Johnson
Book: http://www.AbominableFirebug.com/

----- Original Message -----
From: "Dave Dunsmoor" <mrfixit at min.midco.net>

>
http://www.techflash.com/venture/Photos_Inside_the_Fisher_fire50049932.html
>
> Hopefully this will answer some of your questions.
>
> Clay Freinwald