Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Negative ground cable – bare copper?! › Reply To: Negative ground cable – bare copper?! November 5, 2021 at 1:31 am #992864 Jonathan GabrielParticipant I think you might just want to purchase the same gauge size electrical cable and cut off some insulation to your desired length and make yourself the proper connection.