My neighbor is building a garage and I was looking at the wiring which had been done by an electrician. The 220 volt circuits are wired with two conductors wire, black and white and bare copper ground wire. The white wire has black tape on it so the two black wires are the hot leads while the bare copper wire is common wire and there is no ground wire.
When I was taught to wire 220 volt circuits many years ago, I was taught to use three-conductor wire (red, white, black and bare copper) where the red and black were the hot leads, the white was the common and the bare copper was the ground. Has the electrical code changed? If they are using two conductor with a bare ground for 220 volt circuits, will they be using single conductor black wire with bare copper ground to wire 110 volt circuits? This change seem like a step backward and unsafe way to wire.
When I was taught to wire 220 volt circuits many years ago, I was taught to use three-conductor wire (red, white, black and bare copper) where the red and black were the hot leads, the white was the common and the bare copper was the ground. Has the electrical code changed? If they are using two conductor with a bare ground for 220 volt circuits, will they be using single conductor black wire with bare copper ground to wire 110 volt circuits? This change seem like a step backward and unsafe way to wire.
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