How to Convert 2-Wire House Wiring to 3-Wire Ground | Hunker Author: Heather Skyler2-Wire Vs 3-Wire. The third prong on an outlet is typically called "the ground." The ground wire The Box Must Be Grounded. You can retrofit your 2-wire outlets with new 3-wire or GFCI Remove Old 2-Wire Receptacles. Once you're certain that your electrical box is grounded, it's time Connect the New 3-Wire Receptacles. Now, it's time to install the new receptacles. First, you must See all full list on hunker 2-Wire (no ground) Electrical Outlet Installation Wiring 2-Wire (no ground) Electrical Outlet Wiring How to wire an electrical plug outlet or wall plug when no ground wire is present or how to add a grounding conductor. POST a QUESTION or READ FAQs about how to install and wire electrical outlets or receptacles in buildings.