whit3rd wrote:
On Tuesday, November 28, 2017 at 12:48:01 AM UTC-8, GS wrote:

Commercial isolation transformers get rid of common mode noise, and since
one leg of output is tied to ground, forms a new local neutral.

That's only true of SOME isolation transformers; the ones used for
bench safety when working on live equipment do NOT make the
neutral-ground connection.

All commercial isolation transformers must inform to code. All Tripplite
isolators are grounded. It worries me some think it's all the same. Easy
enough to examine or measure. Still can be a problem on equipment needing a
ground configuration for the circuitry.

Greg