On Sep 1, 5:40*pm, (chuckferguson)
wrote:
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Hi,
I install home computers, and recently I was in a beautiful old house to
install a machine but found there were only two-prong ungrounded outlets.


Two prongs does not always mean no ground. In many old homes the
outlets are connected via metal conduit which provides a ground.
Without checking you can not be sure it is grounded even if it has a
metal conduit.

Since there are so many variations around and in older homes there
often are non-code wiring, I suggest that to be safe, either assume
there is no ground, or have it professionally checked.