Torrey Hills wrote:
On Aug 18, 5:52 pm, Bob AZ wrote:

On Aug 18, 1:30?pm, wrote:


Figured you guys would know...
I have found a used 220 v 3-phase oven that I would like to use in my
shop. The problem is that I only have 220v single phase.

First of all determine if the heater elements are 220v or 110 volts.
If they are 220 your unit is probably wired delta. If 110 volts then
WYE. They are marked somewhere. Also determine the KW rating of each
heater element.

Remove all the wiring.

If the elements are 220 then wire each individually to a 2 pole 220
volt breaker. No neutral needed.

If 110 volts then wire each individually to a single pole 110 volt
breaker. A neutral will be needed.

As another said watch out for the neutrals. If you end up wiring for
110 volts make sure you wire them to alternate hotlegs of the 220
single phase in your panel. Don't make the neutral wiring smaller than
any 110 volt wiring.

Also any wiring within the heater must be, HPN I believe it the word,
IOW high temperature rated. And the terminals on the heaters also heat
rated. (I am not up on the wire and terminal types.)

I am guessing here but I would imagine that this heater is too much
for the 220 single phase service you have to your shop. An upgrade
might be in order.

Bob AZ


Yes, I agree. It is important to determine if the elements are for
220V or 110V (3 phase makes it 08V live to live), it makes a big
difference. From a different angle, 137 A power draw may be a little
high for a typical home. You may need to make sure your main breaker
can take it.

Ken

Opportunities are never lost. The other fellow takes those you miss.

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YOur household electric stove and oven doing a Thanksgiving dinner
takes more than a small heat treat oven. Its not a car bottom heat
treat oven I hope. My 12 x 12 x 20 inch 2000 degree F oven is less
than 5000 watts. That is only roughly 25 amps at 220 volts.




John