When I started this thread it was to point out how a so called travel adapter, probably designed to help you out to charge the phone or shaver, even a hair dryer is to much for it, but it may easily be misused, and it may cost lives.
The thread has been wider, and I use several US units not meant for use here in Norway. Mainly because it is not available here. All equipment made for DC with adapters are really no problem, most of the adapters are made for 100-240V 50-60Hz and draw far less then 1 amp so if I do not care to change it, an adapter will work well, I usually tighten the springs to get safer connection, and glue the plug adapter to the original adapter.
I also have equipment instruments and test tools only made for US standards. Then use an transformer 230 to 115V. 60 Hz transformers may get problems with 50Hz due to a need of more heavy cores, so I watch them carefully, but it is still a risk.
