George I do thank you for the kind words and rest assured I learn much from all your questions here.

I think you are an asset to ECN. [Linked Image]

Now here are my thoughts on the question.

I don't know anything about it. [Linked Image]

I use what is either in the job specifications or what the purchasing department gets me.

It is always true fire rated seal, but I suspect we use it for areas we really do not have to.

I defer to Roger on fire proofing he always seems to have the info at his fingertips. [Linked Image]

Bob

Bob Badger
Construction & Maintenance Electrician
Massachusetts