I think the #14 would be fine if fed with a 15A or smaller circuit. If it's a commercial application it would more than likely be fed with 20A and be required to be #12.
Here is another thought. I did some wiring today in a Notifier fire alarm system power supply and noticed that at the branch circuit terminal bar the connection point for the "ground" did not say ground it said earth. both on the term strip and on the directory inside the panel cover. I wonder if something like this has raised the question.
