ECN Forum Forums Photo Discussion Forums Photos for General Discussion New Type Of Tee Condulet

What's that gray crud?

Yeah,
What is that in your left glove Scott?.
It looks like something covered with Duct-tape.
Duct tape has a very distinctive shade of silver, that is easily recognisable a mile away.

Looks like vermiculite .

The gray crud is either celulose(ground up newspaper with fire retardent) or rock wool both used as insulation. My guess would be cellulose

Another little thing of interest is that copper wire running across in front of the "tee".
That is the equipment grounding conductor

It is probably connected to the cold water system someplace, and runs to the boxes forthe bath, kitchen, and laundry
This was an acceptable method of grounding in the '50s and early'60s, and was used with romex that didn't have a grounding conductor.