Thanks Brian. That explains a lot. I thought it was somewhat odd that most ethernet magnetics provide much greater isolation than required by the safety standard. My thinking was it was for use in a greater range of applications and maybe even for use where the Norway/Sweden deviations apply, but that didn't make since because the parts only had a hipot rating and not supplementary insulation with a stated creepage/clearance figure.
So, based on the info you've given, it seems there are a certain number of ethernet products out there that may not conform to all of the IEEE specs. (I'll keep make/model notes on testing I do in the future)
