Hi Mike,
The only appliance that is "legal" for ground and neutral together is an
electric stove. That is now being phased out to a 4 wire circuit. The 3
wire version for the stove had to be a dedicated circuit. Nothing else
fed but the stove.
What you have for 3 wire 220 volt outlets are probably the 20 amp
window air conditioner type outlets. That would be 2 hot and ground. If
they are dedicated circuits you could run it like the stove, but the
proper thing to do would be to run a fourth wire for the neutral.
You may look into tying the fan and pilot light across 1/2 the primary
winding of the transformer in the amp to get the 120 volts for them. The
transformer primary works like an auto transformer in that case from the
220 line. Then you would not need any neutral. Just the two hots and
ground. Unless there is something else that needs 120 volts.
73
Gary K4FMX
Michael Tope wrote:
> Hi All,
>
> Our club just inherited a Henry 2K-D which I was planning to
> wire for the 220VAC service that we have available in the
> shack. My quandry is how to properly connect the 4 wire
> 220VAC wiring on the Henry (2-hot, 1-neutral, and 1-ground)
> to the 3 pole 220 outlets in the shack? While its clear to me
> that tying the neutral and the safety ground connnections on
> the Henry together will work functionally, I am wondering if
> this would be kosher from a safety/code point of view. Is
> the third wire in a 3 prong 220 outlet supposed to be a safety
> ground or is it actually allowed to carry neutral current in the
> case where both 110V and 220V are needed inside the box
> (it looks like the pilot bulbs and blower in the Henry use one
> "phase" of the 220V circuit to get 110VAC)?
>
> Thanks,
>
> Mike, W4EF..................
>
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