In the US are these cords required to be UL or CE approved?
No.
But look. Americans are such snowflakes they can’t ride a bicycle any more without a helmet. So of course everyone gets their panties in a bunch over electricity. A simple amp mod question a while back generated:
1. You’ll kill yourself
2. Even if you unplug it (!)
3. You’ll burn the neighborhood down.
Not kidding. Actual comments. The Greatest Generation we are not.
A picture of the actual amp mod in question can be seen here: https://systems.audiogon.com/systems/8367
Looks pretty scary, don't it?
This thread will now go on for pages and pages, getting worse hour by hour and day by day, until at last its the same three guys bantering endlessly back and forth. So much potential. So wasted. So sad.