SBay_ecologist

Good question. I am being told that in older buildings they are. However, I would like to make sure that this is the case.

How would I determine if the junction box is grounded?

Thanks

kok328

To check if a box is grounded, you'll need a voltmeter.
Put one lead of the meter to the known hot wire and the other lead to the junction box.
If the box is grounded, you'll get a reading of 110-120 VAC.
If the box is not grounded, you will get a reading of 0 VAC.

JoeD

Even with 120 volt reading it still might not be a valid ground by code. Certain types of armored cable will show a ground connection but are not valid grounds.