I am working to convert a hard wire light fixture which I have purchased to a plug in light fixture. The light fixture was designed for outdoor use, but I will be using it inside. Coming out of the light fixture is what seems to be a regular lamp cord for the hot and neutral, but there is a an exposed copper ground wire that is not protected/sheathed.
I am concerned about the ground wire being exposed because I plan to take the fixture, splice it onto an extension cord or other lamp wire, but so the lamp wire will look better going down the wall, I plan to threat the wire through metal chain.
What should I do about the ground wire in this case, it seems odd that it is exposed and would be hanging out by itself, but this is in the installation diagram so I guess its on purpose. Can I just cut the ground off since this is for indoor usage or is it safe running along the main cord with the chain around it?
Should I just by a regular extension cord (if so what gauge/rating) or are there certain things I need to know based on the light to choose a more power cord for this purpose? Want to make sure I ground and protect everything.
Edit: Reference Photo