On Monday, November 6, 2017 at 1:50:33 PM UTC-5, Pat wrote:

You do know that only 2 of the three bulbs should be lit for a good
outlet, right? The ones going from hot to ground and hot to neutral
should be on. The one going from neutral to ground is always off
unless hot and neutral have been swapped due to a wiring mistake.

Yes. Like this:

http://www.liberty-hi-railers.com/im...let_tester.jpg

The neutral line lights only when there are swaps, and only in two of five conditions.

Peter Wieck
Melrose Park, PA