The neutral goes nowhere. A 220V load just needs the two wires. If
an appliance also wants to run something on 110V, then it requires a
neutral. This is common when 220V is used for something like a
heating element and control electronics, light, clock, etc run on
110V. Just stick a wire nut on the extra wire and leave it
unconnected. You still need the bare wire connected to the green
screw, but that only comes into play as a safety device when
something goes wrong. The motor itself is running on the two wires
attached to L1 and L2.
At 09:55 PM 12/9/2009, John Mitchell wrote:
> I just received a new Ingersoll Rand compressor which in 220V
> single phase. The problem is the box has only 2 wiring
> connections, L1 and L2. There's also a greenish screw at the back
> of the box, which I assume is for the bare ground wire. So where
> does the neutral wire go?
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