NEMA 14-50 outlet installation – uninsulated ground ok to use? Leave a comment

Purchased a new house that is pre-wired for electric car charging with 4 wires: red, black, white, and 1 uninsulated wire (see picture). I’m trying to install a NEMA 14-50 outlet (for a Tesla) and its pretty straight forward, but hesitant to install the uninsulated ground to the outlet. Is ok to use the uninsulated ground? If not, what would be the alternative?enter image description here

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