[R-390] RE:

[polaraligned]

> 
> How old are you? BX caused fires back in the 1960s and 1970s. 
> Well documented.
> 
> 
> Ken Gordon W7EKB



My question ken is that if fires caused by BX are well documented
then why are so many commercial buildings required to use it? 
Why do whole citys require it?
Was it an installation problem that caused the fires?
What was the mechanism by which the fires were caused?
What is different now that it does not cause fires?

Just trying to learn,
Scott