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If you are installing new switches in an old farm house what do you do if there aren’t any ground wires?

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    How old is the bigger question? Your boxes should be metal. So, in that case, you’ll want to see if they are grounded using a voltage tester. If they are then you would install a screw / pigtailĀ ground wire from the box to your switch or outlet.

    If the box is not grounded, thenĀ upgrading your electrical system would be a great idea.