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Eliminate one wire from the 3 phase 208 volt and install a 240/250 volt 2 pole breaker . but the oven has to be rated for 240 volts check the nameplate on the oven or it will not work.
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Some three phase resistive load devices will allow the device to be used on single phase. The wiring diagrams will be on the nameplate of the device. It usually involves the repositioning of jumpers to create new connections within the device to keep the resistive coil currents equal. This is to provide equal heating throughout the oven. Other wise there would be cool spots where the third phase leg resistive coils had been taken out of the circuit.
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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
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always use a test meter to ensure the circuit is, in fact, de-energized.
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Jordan208 volt oven on 240 volts
Not a good idea. Theoven will operate above its given specified wattage. A 208 volt oven run off of 240 volt will have a wattageoutput increase. Ohms law stated that current is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit.
For example if the oven is 5000 watts at 208 volts, the current is I = W/E 5000/208 = 24 amps. The resistance of the oven is R = W/I (squared) =5000/24 x 24 (576) = 8.68 ohms.
Applying 240 volts to the sameoven whose resistance is 8.68 ohms results in this new oven wattage rating. W = E (squared)/R = 240 x 240 (57600)/8.68 = 6636 watts. This is 1636 watts higher than the manufacturer's specified safety rating.
This higher wattage will present itself as heat and maybecome high enough to do substantial damage to surrounding areas.
The other way around,
a 240 voltoven can be run off of 208 but the wattage will be reduced.
W = watts, I = amperage, R
= resistance in ohms and E = voltage.
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