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Electrical Wiring

3-wire Dryer Circuit

11 years ago

Am I correct that for a 3-wire circuit for a dryer the connections hot-hot-neutral (vs. hot-hot-ground) of a "straight" 240v circuit? If so, how does that work in places like Chicago where metal conduit is used? Did they always push a third wire and have a dedicated neutral and the conduit is the ground?

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Ron Natalie
11 years ago
last modified: 11 years ago
Yes, the code in the past (and for grandfathered installations now) allows the equipment ground to be connected to the grounded conductor (i.e., the neutral). In places where you have a legitimate ground (either because the grounding wire has been run or you have metal conduit), you really should have a FOUR WIRE plug under any modern version of the electrical code. Yes, when you use the conduit as the ground, you need a separate grounded conductor if there are any 120V loads.

Most dryers and ranges have a jumper (or some similar provision) for connecting the equipment frame to the neutral terminal or not depending on your existing wiring.
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