I get lots of "As Directed" work orders, and it usually works out pretty well, but can draw the line as far as anything unsafe, unethical, or contrary to Code. I just don't do the work. Knowingly doing something wrong "as directed" won't save your a** in court, whether you have a disclaimer or not.
I didn't mean to sound so drastic.Sorry Some of the worst customers I've run into are the "I've already got the parts, just need them installed" ones. You get to the job and they've got a new 40A breaker to replace that pesky 20 that keeps tripping. These seem to be the same ones that'll blame you if anything goes wrong.